Tech Help, Panasonic KX-TD systems

Programming cheat sheet




  1. If you're trying to program your phone system from a digital phone, and the display shows "another use," it means that someone else is already programming from a phone, or that a PC is connected for programming. Programming can only be done from one phone at a time, or a PC, but not a phone and a PC simultaneously.

  2. The digital system installation manuals say that the maximum cable length for connecting a printer to the control unit is 2m (6.5 feet). If you are connecting a PC for programming or call detail recording, you should be able to go 50 feet or more.

  3. When using a KX-T7335 to program a KX-TA1232, the left and right arrow keys on the template cover the Intercom and Message buttons and DO NOT WORK as arrow keys during programming. In the front of the TA1232 Programming Guide (page 9) it mentions that the left and right arrow keys should be the FWD/DND and CONF buttons. The 7335 does not have those buttons pre-assigned, so in order to use the arrow keys during programming, you have to set two of the CO buttons to FWD/DND and CONF. For the left arrow, use Code 70 (CONF) and for the right arrow, use Code 4 (FWD/DND). Ignore the left/right arrow keys on the template. Thanks to Dick Snow for this valuable tip.

  4. We get calls from people who have trouble programming their phone system control units ("KSUs") and voice processing systems from a PC,  but we've never found the trouble to be caused by a bad Panasonic product, and it's almost never the fault of bad software.

  5. Many people don't realize they need a null modem adapter or AbleComm's special ProCable  for programming a voice processor. You need it (unless you want to make up your own null modem cable -- an activity best reserved for extreme geeks and masochists). 

  6. Most trouble turns out to be a bad or weird cable, or a bad or weird null modem adapter. Sometimes people will try two PCs, half a dozen cables and three or four null modems -- things that they'll SWEAR are perfect, but just don't work.

  7. Some cables that work fine with laptops don't work with desktops, and vice-versa.

  8. Some cables that work fine with Voice Processing Systems, don't work with phone systems, but we've never seen the opposite problem.

  9. We can tell you this much: AbleComm's special ProCable has never failed; and Radio Shack's own serial cable and their null modem adapter will work most of the time.

  10. You may have trouble if you use a 25-pin to 9-pin adapter, but a factory-made cable with 9 pins on one end and 25 on the other should be OK. The KX-TD308 control unit and the KX-TVS50, 80 and 90 have 9-pin connectors.


If your Panasonic KX-TD "system" phone is doing weird stuff, dial Intercom 790 to clean out the crap.

This is a good method for turning off a message waiting light that's on even though you don't have any voice mail messages waiting for you.

Panasonic KX-TD

user tips

(1) While it is possible to change the designated extension numbers ("intercom numbers") to give you a nice logical pattern (such as all phones on the third floor begin with 3), it is a major PITA and probably not worth the effort, unless you have a severe case of masochism.

(2) If you are on a call, and your phone doesn't ring or give you Caller ID when another call comes it, you need to program "Internal Call Waiting" for your phone. Press Intercom, then 7311 to activate.

(3) If you tap the HOLD button twice in rapid succession (deliberately or by accident) you'll notice that the light does a "double-wink."  This means that the call is now on "exclusive hold, and only the phone that put the call on hold, can take it off hold.

(4) Program #108 can be a terrific timesaver or a major PITA. It's used to establish "Automatic Hold" for all the multi-line phones and DSS/BLF consoles in the system. It saves time by automatically holding a caller on one line, when you want to use intercom or another line, without having to use the Hold button. It's a PITA, because it will often ACCIDENTALLY put lines on hold...even sending Music-On-Hold through the speaker on someone else's desk (which might be fun).

(5) You can eliminate the alerting tone that people hear when you join a conversation, by changing field # 13 in program 990 in the digital systems. This is good for managers who have to monitor staff members who interact with the public, and for kids who want to listen-in on parents' calls.

(6) The system can automatically correct the displayed time based on information sent with Caller ID, once a day. Change field # 30, in program 990.

(7) If you want to transfer a call to a phone that is programmed to forward the call outside, you need to do a "supervised" transfer. Press Transfer, then dial the intercom number or press a pre-programmed button for the person, and stay on the line until you hear ringing, then hang up. Thanks to Panasonic TechWizard Frank for this tip.




(KX-TD308, 816, 1232, 500, KX-TA1232)

A phantom extension is an artificial extension number (intercom number) that can be assigned to a programmable button on a multi-line "system" phone.

This feature allows a phone to have more than one extension number.

It's very useful when a Panasonic voice processor is connected to a phone system. If a Custom Service menu says "press two for technical support," and a caller presses two, the voice processor could then dial phantom extension number 195, and all the phones with buttons for extension 195 would ring, and someone could then tap the flashing button (which could be labeled "TECH"), and answer "technical support."

The same person might also have a button for extension 191, and answer "sales."

She would still have her normal extension number, and if her phone rang while her intercom button was flashing, she could answer "This is Sally."

In addition to voice processor transfers, calls can also be sent to phantom extensions when transferred manually by a human being, and you can use "DIL 1:1"  (programs 407 and 408) to direct a specific phone line to a phantom extension group.

The Phantom Extension numbers have to be numbers that are not used anywhere else in the system.

The KX-TD308 can have up to 16 phantom extensions. Some good ones are 100, 190, 200, 290

The KX-TD816 and 1232 can have up to 128 phantom extensions. Some good ones are 100,189,190,195, 200, 265-290

You can use other numbers, if you take them away from their programmed functions, and reassign new numbers for those functions.

You also need to assign the numbers as phantom extensions before you can use them (system program # 124). The phantom list starts with 001, 002, 003... only as a numbering scheme. Don't let that confuse you. If you want to make phantoms 100, 190, and 200, they will be 001=100, 002=190, 003=200 etc.

  • If you have a small business and want to seem big, create a big menu in your voice processor and load your phone with a bunch of phantom buttons and you can answer for sales, service, accounting, human resources, legal, import, export, men's room, or whatever you want. You can answer with different voices, foreign accents, even foreign languages... and you can transfer calls to yourself.

  • You can't forward a call from a phantom extension with the FWD/DND button..

  • If your phone system is a KX-TD816 or KX-TD1232, version 4 or later, you can establish voice mailboxes for phantom extensions, and you can have message waiting lights on several phones.

  • For older systems, you can have messages automatically forwarded to another mailbox. 


Photo of creepy guy shows Lon Chaney, in "Phantom of the Opera."




Panasonic often uses the archaic word "trunk" when they mean a "phone line." Trunk Groups are important if you want to change the way your phone system selects a line when you dial 9, or use speed dialing.


  • By default, in a KX-TD816 or KX-TD1232 digital phone system, or KX-TA1232 analog system, each phone line is in its own trunk group ("TRG."). If you have more than 8 lines in your system, lines 8 and up are in TRG 8.


If you dial 9, or use speed dialing to call someone where 9 was programmed ahead of the phone number, the system chooses the lowest group first, but highest number (last line) in the group. (If that line is in use, the system will choose the next line in the sequence.)

Program 401 allows you to change the trunk groups that your lines are in.

If you have 8 or fewer lines, and each one stays in its own group, the system will choose the first line first.

If you put all lines in one group, the system will choose last line first.

  • The KX-TD308 doesn't use trunk groups.

Program 103 allows you to change the line selection sequence. You could have 123, 321, or whatever you like.

Most important programming steps for Panasonic KX-TD systems


Our Panasonic phone systems have a huge number of programming options, but you can literally take the control unit out of its shipping box, hang it on the wall, plug it in, and start talking, with no programming at all.

We have listed the digital system programming steps that are most important for most people. NOTE: Many of the features have the same numbers in the analog KX-TA624, KX-TA824 and KX-TA1232. Some features discussed in the manuals are not available on older control units.


  1. "System Programming" is normally done from the lowest-numbered phone in the system, or another phone that has been designated as a "manager's phone."

  2. To get into system programming in a KX-TD system or the KX-TA1232, press PROGRAM, *, #, 1234. If your phone does not have a PROGRAM button, press the PAUSE button.

  3. To get into Station Programming (for one phone), press PROGRAM (or PAUSE), 99


  • 000 Date & Time (Do this first.)

  • 600 eXtra Device Port (DON'T set it up for jacks that have multi-line analog phones, including Panasonic "system" cordless phones.)

  • 001 System Speed Dialing (First make a list on paper.)

  • 601 Class of Service (allows & denies privileges)(allows & denies privileges)

  • 109 Expansion Unit Type (Turn power off & on after change.)

  • 603/604 DIL 1:N (determines which lines ring where & when)

  • 406 Caller ID Assignment (CID won't work without this.)

  • 607/608 Door Intercom Ringing (default is just one phone)

  • 505 Executive Busy Override (allows barging-in on calls)

  • 128 (KX-TD308) or 133 (KX-TD816 and 1232) Caller ID jack (for standard phones & displays)


The following features are useful, but may be less important. Items with asterisk* are important for Panasonic Voice Processing Systems.

  • 002 Speed Dialing Names (corresponds to numbers programmed in # 001)203 Intercept Time * (determines how soon un-answered calls go to Voice Processor or ans. machine)

  • 003 Extension Number (changes intercom numbers at jacks)407/408 DIL 1:1  ** (like 603/604, but just one jack per line)

  • 004 Extension Name (allows phones to display names on intercom calls)409/410 Intercept Extension * (sends un-answered call to Voice Processor, ans. machine, person.)

  • 006 Manager Extension (allows a second phone to program)

  • 009 Quick Dialing (allows one tap of touch-tone pad to make call. Requires #100 also)

  • 007 DSS/BLF (allows use of DSS/BLF display console)120 Programming Password (assigns password needed to program)

  • 102 Voice Processor Port *(Tells the system which jack goes to Voice Processing System. Original KX-TA624 only)

  • 124 Phantom Extension Number (sets up extension numbers for temporary shared use)

  • 110 Caller ID Code Set (used to display name when phone company sends number only)

  • 125 Caller ID Area Code (ignores local Area Code for call-back)

  • 111 Caller ID Name Set (works with #110 in match-up table)

  • 126/127 Caller ID Modifications (adds & deletes digits for call-back)

  • 117 Voice Processor Port * (Digital systems & KX-TA1232. Tells the system which jack(s) you're using for the Voice Processing System)

  • 130 or 131 Voice Processor Port *(Tells the system which jack goes to Voice Processing System. KX-TA624-1 or later.)

  • 990 (Field 3) Changes FLASH button for use with Call Waiting

  • 417 CO Line Name Assignment (allows LCD to show words like "sales" or "emergency" or "children" when call comes in.)

** DIL 1:1 is used if you want all calls to be immediately answered by the Voice Processing System, and will override DIL 1:N settings.

In addition to system programming that can affect several phones or all phones, there are programming steps and features that can make individual phones more useful. Here are some of the best:

  • Make sure your Auto Answer button is lit up, so you can receive intercom announcements, and respond hands-free.

  • Use the Call Forwarding (FWD) to send un-answered calls to another phone or to voicemail

  • Press BGM (or 1 on the touch-tone pad) for background music, if your system is equipped.

  • Use Absent Messages to show text messages on other people's phones when you are away.

  • Use System Call Waiting so your phone will ring even when you're on the phone. Press Intercom and dial 7311 to set it up, or 7310 to cancel.

  • Use Do Not Disturb (DND) when you don't want to receive calls. Press Intercom, press FWD/DND and dial 1 to activate, or 0 to cancel.

  • Press MESSAGE when you call a busy intercom number. This will turn on the MESSAGE light on the other phone, and the other person can tap that button to automatically call you back.

  • If you get a busy signal when you call an intercom number, you can signal the other person by dialing 1 (if that phone is programmed for System Call Waiting (above).

  • Dial 330 to make an announcement to all phones.

  • If you want your phone to automatically select an outside line when you pick up the handset, press PROGRAM, dial 99, dial 12, press STORE, press PROGRAM.

More information is in the small Reference Guide packed with each phone, and in the large User Manual.

Some Panasonic optimizing & troubleshooting tips

  • Recent Panasonic voice processors have "trunk service," that allows you to program which custom service menus go with which phone lines. When you program, you will be asked for a "trunk group," but the system really wants you to enter a line number. This programming has nothing to do with trunk groups (also known as TRGs, outside line groups and other things) that may have been programmed in the phone system. If your phone system has a trunk group that includes lines 1, 2 and 3 as trunk group 1, you will have to enter all three lines separately when programming trunk service in the voice processor.

  • If you are using a Panasonic T1 circuit module, keep in mind that by default, the phone system thinks that the T1 lines have CO line numbers 25 through 48. To make these lines appear under the flexible buttons on your phones, you'll have to reprogram the buttons. You can use station programming at each phone, or system program #005. Thanks to Panasonic tech wizard Jason Laboy for this tip.

  • If you are programming a digital phone system or the KX-TA1232, and your phone does not have a PROGRAM button, use the PAUSE button. Remember that both "program" and "pause" start with "P."

  • The Phantom Extension numbers have to be numbers that are not used anywhere else in the system. That means that you are limited to: 100,189,190,195, 200, 265-290, unless you have changed some of the others.

    You also need to assign them as phantoms before you can use them.  The phantom list starts with 001, 002, 003... only as a numbering scheme, don't let that confuse you. So if you want to make phantoms 100, 190, and 200, they will be 001=100, 002=190, 003=200 etc. Thanks to Charles Patterson of Global Communications for this valuable tip.

  • Bad 7200 series phones. It's fairly common for Panasonic digital 7200 series phones to have bad and/or intermittent audio on the handset, and it can get so bad that the phone has to be replaced or sent to Panasonic for repair. Here's a great do-it-yourself fixit tip from Bertel Schmitt:

"I opened a recently deceased 7235 and noticed discoloration and crud at the bottom right of the printed circuit board (viewed from component side). I cleaned the PCB with contact cleaner and a toothbrush. The 7235 came back to life.

I then went to the box with the dead 72XX phones and opened them all. All had the same discoloration at the bottom right of the PCB, and various degrees of crud on the PCB. All could be revived using the procedure above, and are now working fine.

I don't know exactly what's going on, but I suspect a breakdown of PCB coating. The crud is pretty thick sometimes, and it has to be carefully removed. It's always in the same area. A strategic area appears to be around the wire that connects the PCB with the handset jack. 

Note: We are not talking dirt here. These are phones from various locations, some desk mounted, some wall mounted, all areas are clean. And the problems are always in the same place.

If you have 72XX phones, I recommend preventive maintenance with contact cleaner, toothbrush and possibly a new clear protective coating."

  • Sometimes, first is really second. When installing a Caller ID circuit module in the KX-TD1232 or KX-TA1232 control unit, remember that the module for the first four lines goes in the lower section of the control unit. Make sure all the pins in both ends of the module are lined up properly with the sockets on the main circuit board.

  • Sometimes, second is really first. In the Panasonic digital phone systems, the programming documentation, for such features as line ringing, identifies a digital pair of wires as (jack number)
    "-1" and the analog pair as (jack number) "-2". This nomenclature is the opposite of the sequence for the pairs on a 66-type punchdown block. 

  •  For example, the first pair wired to a 66 block (white/blue, the analog pair of the first "jack") is used for the eXtra Device Port on a digital phone or an analog phone in another location, even though programming identifies it as 1-2.

  • The second pair (white/orange, the digital pair) goes to a Panasonic digital phone and is programmed on Jack 1-1. BIG THANKS to Randy Kauk for this important reminder.

Panasonic digital phone systems can provide two kinds of Call Waiting, and it can be very confusing.


  1. Normal Call Waiting, provided by the phone company, is activated by pressing the button under "EFA" (External Feature Access) in the display. If you are not using a display phone, you can use the Flash button, if you re-program it to function for EFA. Use system program # 990, area 01. Change Bit 3 (the third digit from the right) from 0 to 1.

  2. "Internal" or "system" Call Waiting allows you to know that someone is trying to reach you on the intercom (and can also give you Caller ID and a low-level ring on an outside call when you are using the phone). To set up this option, press Intercom, then 7311, then press SP-Phone to hang up.

  • If a multi-line analog phone (including the KX-T7880, 7885, 7894, 7895, or 7896 cordlesses) doesn't work in a Panasonic digital phone system, make sure XDP is DISABLED for the particular jack (program #600). Also make sure that you are using a line cord with four conductors, and that all four wires in the jack are live. If it doesn't work in one of the last four jacks in a KX-TD308, there is a good chance that the system does not have a KX-TD30870 analog expansion module.

  • If you are replacing an older analog KX-T123210 or KX-T123211 with a newer KX-TA1232 or KX-TD1232, you have to make a minor wiring change to connect the outside phone lines. The older systems used RJ11 single-line jacks, but the new models use RJ14 two-line jacks. If you don't "double up" in the jacks, the phone buttons for line #2 won't have dial tone, and the buttons for line #3 will have line #2. The buttons for line #4 won't have dial tone, and the buttons for line #5 will have line #4, etc.

  • Electronic stuff can be weird, even perverse. Computers and phone systems do things that make absolutely no sense, are totally illogical, and may seem physically impossible. We went through a week of torment trying to install a KX-TVS200 voice processing system with one 4-port KX-TVS204 module, on a KX-TD1232 phone system.

    The first of the four ports (#165) refused to answer, but the phone displays indicated that we were indeed calling the voice processor's first port. Ports 166, 167, and 168 worked fine. 


    Even though it seemed illogical, we followed Panasonic's advice to swap wires, re-punch wires and replace wires. We also replaced the VS200, replaced the VS204, verified the port service settings, defaulted both VS200s, tried different extensions on the D1232, deleted and re-did the program 117 settings that specify which jacks the VS200 are connected to... and nothing helped.  

    The ultimate cure was was very simple. We disabled program 117 and plugged a regular digital phone into the jack where we had tried to use the voice processor. The phone worked fine. Then we re-did 117 to specify the voice processor jacks. The sky cleared, the sun shone brightly, the birds chirped happily, and all was well with the world. BIG THANKS to Panasonic tech wizardRich Rodriguez for his help on this one.

  • IMPORTANT KX-TA1232 NOTE: when programming a Panasonic voice processor to use with the KX-TA1232, if the voice processor Quick Setup section doesn't list the KX-TA1232, select KX-TD1232, not the analog 1232!

  • Trouble programming your VPS? If you can't get your computer to communicate with your KX-TVS75, 90, 100, 110, 120, 200, 220, 300 or 320 Voice Processing System, shut the power off, turn the little rotary switch from zero to one, turn the power back on, and turn the rotary switch back to zero. (BIG THANKS to Panasonic tech wizard Denton for this life-saver.) The process is different with the KX-TVS50, 80 and 90. Shut off the power, move the "DIP" switches to right, left, left, left. Turn the power back on, and move the switches to left, left, left, left. BIG THANKS to Panasonic tech wizard Frank Goode for his help on this one.

  • If your PC can't communicate with a Panasonic phone system control unit, do a system clear and reset. (You will lose all programming and return to default settings.) 

  • A Panasonic digital phone system can automatically correct the displayed time based on information sent with Caller ID, once a day. Change field (or "bit") #1 of area #05 in program 990. Some manuals show this as field #30.

  • If your phone system seems hopelessly messed-up, with weird light patterns, strange sounds, non-functioning features, etc, shut it off for a minute or two, then turn it back on. There's a very good chance that the trouble will go away, without paying a penny for repairs.

    This also works for computers, cordless phones, appliances, calculators, even cars.


    Microprocessors (smart circuit chips) can get confused; and like human brains, they often work better after a rest. Lots of "defective" products work perfectly by the time they arrive at the repair place.

    If the malfunctioning machine uses batteries instead of AC, pop them out for a little while. In a car, carefully disconnect a battery cable.

  • When diagnosing a malfunction, test every piece of hardware that is involved. You'd be surprised at the things that can be improperly manufactured, inadequately tested, or ruined by human contact. We recently installed a phone system, and the door intercom wouldn't work. We replaced the door speaker, and then the intercom module, and were about to replace the entire control unit, when I decided to check the cord that was plugged into the intercom module. That stupid $4 cord -- which had no right to be defective -- had caused the problem. It wasted our time and annoyed our customer. We'll remember it, and you should, too.Anything can be made wrong, or messed up. Things that people touch are more likely to get messed up than things that don't get touched.

  • You can eliminate the alerting tone that people hear when you join a conversation, by changing field # 13 in program # 990 in the digital systems. This is good for managers who have to monitor staff members who interact with the public, and for kids who want to listen-in on parents' or siblings' phone calls.

  • People often forget feature codes, so program some buttons to activate important features with a finger tap or two. Set up buttons to page all phones, activate and deactivate call forwarding to an answering service, switch from day ringing to night ringing, etc.

  • Even if you don't care about providing music-on-hold, a radio plugged into your phone system's control unit can providebackground music or radio through your phones' speakers. The sound will stop when the phone is in use, but you can also program buttons for RADIO ON and RADIO OFF.

  • Great idea from Chris Arndt: Connect a weather radio for weather-on-hold, and weather reports at all system phones when you tap a button for background "music.".

  • Connect your fax line to an unused "CO" line circuit, and set it for a distinctive ringing sound (on a digital system). When a fax comes in, everyone who should know about it, will know about it, even if the fax machine has a low ring and is stuck in a back office.

  • Panasonic phones systems are very robust. They are hard to kill, but can be temporarily wounded. If your system crashes and you can't bring it back to life by resetting, disconnect all the wires going to your phone jacks. Then plug one in. If the phone works, keep re-connecting the others until you crash again. Once you find the bad wire segment, disconnect it and inspect it. Chances are, you'll find some damage to the wire, or maybe something soggy in the jack. If you have an outdoor jack, check it first.

  • If a phone is dead or intermittent, try it in another jack that you know works OK, to see if the trouble is with the phone or the jack. If you determine that the phone is faulty, swap its pluggable parts with another phone to zero-in on the defect. Most-likely sources of trouble (starting with most-likely): handset cord, handset, line cord, phone base, jack, wire between jack and control unit, control unit.

  • Things that people touch are more likely to break than things that don't get touched. Wire outside a wall is more likely to have problems than wire inside a wall. Phone equipment in an active office is more likely to have trouble than phone equipment in a locked closet.

  • With a KX-T123211D, KX-TD1232, KX-TA1232, KX-TD816, or KX-TD308, if one or several phones don't work, particularly in the highest-numbered or lowest-numbered jacks in each group of eight (but not the first eight in the D816), there is a very good chance that the 25-pair Amphenol plug has come loose from the female connector in the control unit, or in an expansion module.

  • If a phone has been unplugged and plugged back in and doesn't work, make sure that both ends of the cord are snapped in securely. On a digital phone, make sure its line cord is in the jack labeled "TO EMSS" (7200 series) or "TO MAIN UNIT" (7400 series).

  • If an analog system phone's speaker works, but the handset doesn't, check to see if the headset/handset switch is set for a headset.

  • If an analog phone is dead and you're sure it's plugged into a live jack, check to see if the Program/Set switch is in the Program position. If it is, move it to Set.

  • If you need LOUD volume coming out of a Panasonic phone, you can easily connect a public address "horn" speaker. This works well at pool cabanas and in factories. You can get one at Radio Shack for about $40.You'll be surprised how far voices will carry with no additional amplification. The normal microphone should work quite well, too. You can modify a Panasonic door intercom speaker the same way, if you only need intercom capability. Modifications like this may void your warranty -- BE CAREFUL!

  • If a phone has lights, but no sound, check to see if one of the buttons is being kept pressed-down by the plastic overlay sheet, particularly on first-generation phones like the KX-T61630 with 12 auto-dial buttons. If a button has slipped behind the plastic, wiggle it so it pops though the proper hole, and you'll avoid a $75 service call.

  • A 2-line cordless phone can work very nicely in a Panasonic phone system. Connect each line to a different extension port from the control unit. Remember that the hold button will hold a call in the phone, but NOT in the system -- you'll need to use the flash button for that.

  • Unless you really want visitors at your front door to be answered by a robot voice, make sure that any jack you're using for an answering machine or voice mail, is programmed NOT to ring on calls from the door intercom.

  • Paging announcements will not reach ordinary single-line phones that lack the speakers found in "system phones." Here's an easy trick that can make all your phones ring from an intercom call: Connect one station port to a CO line port. When you call the intercom number for that station port, it will send ring voltage to the CO port, and ring all phones that are programmed to ring. If you have a digital system, you can program internal all-call calls to sound different from external calls. If you have enough ports, you can program this even further, with different zones (groups of phones that can be rung by dialing a number).

KX-TD system versions


The first Panasonic Digital Super Hybrid phone system control units were made in 1993, and the first units sold to the public were made in 1994. The first revision ("dash one") came out in 1996. After that time, we progressed all the way through "dash seven" versions of the D816 and D1232.

The latest (and last) version of the KX-TD308 is dash three. The last version of the KX-TA1232 was dash two.

  • The dash refers to the way model numbers are printed, such as "KX-TD816-7." The actual products are usually identified with a number in a circle on the bottom of the unit, either on the serial number plate, or on a separate sticker attached nearby.

  • Because it is possible that a control unit has been upgraded, the label is not a foolproof method of determining its version. It's better to use program 116 in the KX-TD systems or KX-TA1232to reveal the ROM number, and then tell us the number, and we can tell you which version you have.


Here's what was added in each version:
(some dates are approximate)



  • Free KX-TD193 module installed at factory, for Caller ID on first four lines.

  • The KX-TA1232-2 was also introduced, with free Caller ID on four lines, support for the second and third lines on the display of the KX-T7735 phone, room monitoring without the "beep," and automatic Caller ID logging on both answered and un-answered calls.

  • The KX-TD308 did not get free Caller ID.



  • D1232 is compatible with ISDN "PRI" service. Requires new KX-TD290 circuit module. In addition to the benefits of ISDN, the KX-TD290 module also provides two Caller ID options. With Calling Line Identification Presentation (CLIP), users can assign a number with up to 16 digits to an extension or trunk line. When a call is placed, the CLIP number that was assigned to the extension or the trunk will be shown on the display of the called party’s telephone when the call is received. The second Caller ID option is Calling Line Identification Restriction. This feature allows the user to restrict the appearance of the calling number, preventing it from appearing on the display of the called party’s telephone. This option can be selected as a permanent setting or can be used on a call-by-call basis.

  • 24-Digit emergency dialing feature lets the user assign an emergency or often-dialed telephone number of up to 24 digits to a two-digit combination for convenient dialing.

  • The new Lunch/Break Extension capability was designed as a more flexible alternative to the Lunch/Break Mode available on previous versions. This upgraded feature provides added flexibility in handling calls and a greater level of customer service. For example, now when you’re in the Lunch/Break mode the system administrator can program the system to forward to any one of the following destinations, another extension in the system, voice mail, a Phantom Extension number, DISA or an extension group.

  • Optional 100-column printout of phone call records (British version, not in US version).

  • Enhanced features with voice processing systems.

  • One ROM version from this period is P211Q20604A.



  • D816 and 1232 can handle up to FOUR door intercom speakers, when used with the new KX-TD161 door intercom module. You can select from eight different ringing sounds for each door.

  • The KX-TD1232-5 has an automatic recovery feature for twin-cabinet systems.

  • Remote Call Forwarding Set allows users who are out of the office or away from their desk to remotely forward their calls to another extension or outside telephone. The system can be set to Forward All Calls, Forward Busy Calls, Forward No Answer Calls, Forward Busy or No Answer Calls, Forward to a CO or Cancel Call Forward.

  • When digitally integrated with a Panasonic voice processing system, such as the new KX-TVS110, the clocks in each system will be automatically synchronized with each other, so the voice processor clock will be changed automatically any time the phone system clock is changed.

  • Caller ID announcement with voicemail messages from Panasonic voice processors.

  • One ROM version from this period is P211L10821A.



Support for new circuit modules:

  • KX-TD187 T1 Circuit module (for KX-TD1232). Allows connection of a 1232 system to a digital T1 trunk, providing up to 24 voice channels. It can support any of these line types: loop start, ground start, TIE, 2-Way DID, OPX. In twin cabinet systems it must be installed in the master. When a 187 is installed, you can't have a TD180, TD185, TD284, TD382, TD384 or TD386 module in either cabinet. The eight original CO line circuits in the slave cabinet can not be used. The eight CO circuits in the master, when used with the T1 module, can provide 32 CO lines, as compared to a maximum of 24 lines in a twin system without T1. The TD187 must be connected to the phone company circuits with a Channel Service Unit ("CSU"), purchased separately. AbleComm price for the KX-TD187 is $1362, with FREE "ground" shipping in the US. The CSU costs $496, also with free shipping. 

  • KX-TD198 Remote Access module (for KX-TD816-4). Provides remote programming and diagnostics. It mounts on the front of the cabinet, and can be sandwiched between the cabinet and a circuit mule (KX-TD170, 171, 180 or 185). AbleComm price for the KX-TD198 is $338, with FREE "ground" shipping in the US.

  • TAPI 2.1 Compliance. The new 816 and 1232 conform to Microsoft's "TAPI 2.1" standard for Computer Telephone Integration. Previous generations used the "TSAPI" standard from ATT and Novell.

  • Lunch/Break Mode.  Previous generations of these systems provided ringing patterns and other features based on night or day. The dash-fours have a third type of setting for lunchtime or other breaks from the normal schedule, and can be activated either manually of automatically. More about this later.

  • Multiple Message Waiting Lamps. IMPORTANT STUFF. You can now have more than one message waiting light/button on a single proprietary phone, and several phones can have light/buttons for the same mail box. Additionally, phantom extensions can have message waiting light/buttons. A maximum of 128 light/buttons can be set up in a system.

  • Voice Mail Port Name Display. Your phones can display a name with up to ten characters to let you know which port a call is coming from. This could be useful if you have different ports for business and personal use, or for multiple businesses sharing a system.

  • Selectable Flashing or Steady FWD/DND light. Lots of people HATE the flashing FWD/DND button on their phone, and shut it off and lose system functions. With the dash four revision, you can select steady or flashing for DND and for FWD. I'd like to have a flashing message-waiting light -- the steady light is too easy to ignore.

  • All phones in a group can leave it. It's now possible for all phones in a hunting group, UCD group, ring group or phantom extension group to log out of the group.

  • Restricted flexible button programming. You can now stop people from changing the functions of their flexible buttons, by Class of Service.

  • Call Forwarding setup with software. Call Forwarding can now be set using PC software, instead of having to program at each individual phone.

  • Variable Forward/No Answer time. Each phone can now be set to have its own time to forward un-answered calls, with one to 12 rings before forwarding.

  • Beep On Hold. Previously, callers who were put on hold would hear either silence, or music or messages fed into the system. Now you can have a periodic beep. It's boring, but reassuring. What we really need are multiple inputs that can be assigned to different lines.

  • TVS50 LCS Display change. The dash fours will display Caller ID info for Live Call Screening in hands-free mode and private mode, with the KX-TVS50 voice processing system.

  • ROM versions from this period start with P211.


Support for 7400-series phones:

  • New KX-T7436 phone with big display shows 8 screens of features -- a bit more than 7235. You can use the Jog-Dial to scroll from the bottom of one screen to the top of the next.

  • The Jog-Dial controls volume, ringing and the display.

  • It's very convenient for quick scanning through personal and system speed-dialing directories, feature access list, programming steps.

  • While scanning, when you come to the entry you want, just tap a button to activate the feature or make the call.

  • Volume control function maintains settings for ringer, speaker, handset, and even headset.

  • Select from 8 ringing sounds for intercom calls. We don't know if the door intercom sound can be changed.

  • Phone-users can disable paging announcements at their phones.

  • Off-Hook monitor feature allows people near a phone to listen to a conversation through its speaker, while one person uses handset -- like old ComKey 416 phones.

  • System speed-dialing directory can hold 500 names and numbers, compared to 100 in earlier systems.

  • Number of account codes increases from 20 to 128

  • Caller ID name-number table increases from 250 to 500 entries.

  • Number of voice mail ports increases from 8 to 12 maximum

  • New features for hotels and motels include display of room status on DSS/BLF console at front desk and operation of standard 90v message-weighting lights..

  • Whisper Off-Hook Call-Announce provides quiet announcement through handset to someone on a phone call. Other party does not hear announcement. There is no handsfree response to whisper announcements.

  • New phones are about half-inch wider than older phones.

  • New phones have handset mute -- long overdue.

  • System programming now covers installation of additional types of expansion modules.

Support for new circuit modules:

  • KX-TD171 station expansion module provides Caller ID on single-line phones or standard Caller ID displays. KX-TD170 will remain available.

  • KX-TD185 4-Circuit DID module provides Direct Inward Dialing with phone company DID service.

  • KX-TD194 16-station Message-Waiting module works with industry-standard 90-volt message-waiting lights. You can use one with a KX-TD816-3, two on a KX-TD1232-3, or four on a KX-TD1232-3 dual-cabinet system.

  • KX-TD197 modem module provides remote diagnostics and programming, for KX-TD1232-3

  • ISDN (several models) 

  • One ROM version from this period is P231M81002A.


  • Increased processing speed, circuit board modifications in preparation for dash three. No new features

  • ROM versions from this period start with P231A


  • DPITS on 816. The KX-TD816 got "DPITS" (Digital Proprietary Integrated Telephone System) integration, like the KX-TD1232, for improved operation with the KX-TVS series voice processing systems. DPITS provides faster set-up, and more features, including Live Call Screening, Remote Live Call Screening, Two-way Recording, Two-way Call Transfer, and Paging Notification.

  • Enhanced Caller ID. The KX-TD816 and 1232 can simultaneously display a caller's phone number and name (if provided by the phone company) on digital display phones. Up to 15 answered calls can be logged by the user at each phone, with un-answered calls logged automatically at one phone. Logged calls can be called back while viewing the INFO screen. Caller ID information remains on the screen for the entire call.

  • Ring Groups. After a call is answered, it can be transferred to the appropriate group or department, where multiple phones will ring. Up to eight ring groups can be created, with an unlimited number of extensions in each group. People can temporarily log into and out of a ring group, as staffing requirements and individual priorities change during the workday.

  • Uniform Call Distribution. "UCD" evenly distributes incoming calls to specific people ("agents") who are logged into a group, for shared functions, such as sales, tech support, etc. Four different outgoing messages can be recorded and played in a cycle, and a separate extension can be assigned for overflow calls.

  • Phantom Extensions. Any outside call or internal transfer can be sent to a "Phantom Extension," which will ring every phone with that extension button. This allows sales staff, technical support staff, etc. to identify calls intended for their group's response. Up to 128 phantom extensions can be assigned. 

  • TSAPI (Telephony Services Application Programming Interface). Marries the KSU to a PC, for CTI ("Computer Telephony Integration"). With TSAPI, users are not confined to the proprietary software that came with their systems, but can choose their own software and custom tailor their systems to their particular needs.

  • Quick Dialing. Press a button on the touch-tone pad, to dial a pre-set number.

  • Automatic hold. Pressing a second line button automatically puts the present call on hold.

  • French or English display

  • Phone identification display. Pressing the * key toggles between two display modes. One shows day/date/time; the other shows extension number and name of user or department.

  • External modem for remote programming. It's no longer necessary to use a special Panasonic internal modem module, and external modems can be used with both the 816 and 1232.

  • Live Call Screening. You can listen while people leave messages in your voice mailbox, through the speaker, or handset, even on a cordless phone.

  • CO Line name assignment. The display screen can show a company name, department name, or other designation that corresponds to each line, as a call comes in.

  • Additional programmable button functions. Phone buttons can be programmed for Live Call Screening and Cancel, Log-in/Log-out, Voice Mail direct access, Phantom Extension, Two-way record, Two-way transfer.

  • ROM versions from this period start with P101E.


  • Upgrade chips were put in sockets for easy replacement, instead of being soldered onto the circuit board (most, but not all in this version).

  • The KX-TD1232 got "DPITS" (Digital Proprietary Integrated Telephone System) integration for improved operation with the KX-TVS series voice processing systems. DPITS provides faster set-up, and more features, including Live Call Screening, Remote Live Call Screening, Two-way Recording, Two-way Call Transfer, and Paging Notification.

  • No "dash" or circled version number.

  • ".5" is our designation, not Panasonic's. Panasonic usually calls it "first DPITS."

  • One ROM version from this period is P101A60209K.


  • original

  • No "dash" or circled version number.

  • "0" is our designation, not Panasonic's. Panasonic usually calls it "pre-DPITS."

  • Two ROM versions from this period are P101A50508B and  P011Y441226A



  • Prototypes & testing samples