The BT Response 80 twin tape Answering and Recording Machine is mains powered from a plug top transformer, processor controlled and gives many advanced features within a compact case design.

The facilities of Response 80 are as follows:-

Announcement - Up to 2 minutes 45 seconds with tape supplied. Lift cassette lid, press and release ANS REC, a long tone will be heard and the power light will flash. Press ANS REC button again when recording is finished.

Announcement Check - Press ANS PLAY button.

Incoming Message Tape. Uses standard C3O,C60 or C90 tapes giving 15, 30 or 45 minutes total recording time.

Incoming Message - Up to end of ICM tape or 1 minute if REC TIME switch set to 1 MIN position.

Incoming Message Tape Full announcement to incoming caller advising "tape full, call again".

Skip OGM. Frequent callers can key * (star) from an MF4 telephone and leave a message without having to listen to the OGM.

Volume Control. From zero to maximum volume.

Call Monitoring. Volume Control must be turned up.

Memo Message - No limit, up to end of tape. Press the Memo button to start recording and again to stop.

Built in microphone. Used for announcement and Memo recording.

Message Play. Press PLAY/PAUSE button.

Message Pause. Press PLAY/PAUSE while listening to messages. Press again to continue. Power light will flash during pause.

Automatic Message Save.

Fast Message tape Forward and Rewind.

Fast Message Erase. Press ICM ERASE, a beep will be heard and Response 80 will rewind and erase all recorded messages.

VOX (Voice Operated Switch). High or Low sensitivity switchable by customer.

Rings switch, Long, 2 or Auto. Long = 6 rings, 2 = 2 rings, Auto indicates the number of messages waiting; two rings indicate at least one new message and six rings indicates no new messages.

Remote set to Answer. Call machine and let it ring 20 times. Hang up when announcement heard.

Branchphone reset. Will release machine from the line should a parallel telephone handset be lifted.

Power on indicator.

-Remote Interrogation with two digit security code.

Made by Panasonic - Japan.

Distributed by BT shops and CSCS. Supply on both rental and sale terms. Sold machines can be offered a BT maintenance agreement. BT UK Trade Sales. Supply on sale terms only.

Approval Number S/1010/3/N/502566

Approved as supplied for connection to Public Switched Telephone Networks (PSTN) and 2-wire PBX extensions. It must not be connected to shared service lines or used as an extension to a payphone.

A User Operating Guide TPU 1783 is supplied with each machine.

The Response Combined Telephone and Answering Machine Product Manual PDM/TPM/A010.

A Phone Socket and a 240 volts, 13 amp, 50 Hertz mains supply socket are required within easy reach of the line cord (270Omm) and mains flex (240OMM).

Response 80 is suitable for use on Phone Socket installations on DELs and most types of PBX extensions. Not suitable for use on "C" wire PMBXS.

Ringer Equivalence Number (REN) is 1.

Install and commission the machine as detailed in the User Guide.

The machine contains no on-site serviceable parts, therefore maintenance is limited to functional testing, checking that the line cords and facility switches are correctly positioned, the customer has cleaned the tape heads and checking the condition of both the tapes.

If the machine fails completely the output voltage of the Transformer 19B should be checked. The Transformer 19B output is marked 13.5 volts DC, but will measure about 20 volts when tested with the output open circuit.

Faulty transformers and machines should be replaced by a maintenance spare and the recovered item returned to BT stores in the replacement items packing. A completed fault report form A8807 should be included describing the fault symptoms.

The user guide recommends that the customer should turn over both tapes after six months and change both tape cassettes at yearly intervals. Cleaning of the tape heads, capstan and pinch wheel should be carried out at six monthly intervals with a cotton bud dampened with a proprietary tape head cleaning fluid.

New units carry a 21 month warranty from the date of manufacture as shown on the year and month marking on the base of the machine. The year and month marking forms part of the machine serial number as follows:-

Serial No.   2IBHA001024:-
Indicates:-  2 is the year. 0 = 1990, 1     1991, 2 = 1992 etc
             I is the month I = Sep, L     Dec, A = Jan etc
             B is days in month.  A = 1 to 10, B = 11 to 20 and C = 21 to 31.
             HA001024 is the machine serial number.

Description								BT Item Code
Response 80                                        			870480
Complete with Transformer 19B (13.5v DC) C-15 and C-60 tapes.
BT Remote Interrogator No 2 (MF4)                  			870427
Contains 4 overlays detailing button function and 4 User Guides making it
suitable for use with Response 80, Wren and all Rapports.
Transformer 19B (13.5 volt  DC)                    			870411

Normal test conditions while waiting to answer. After answering the machine loops the line.

Response 80 provides the facility for remote interrogation using a customer programmable security code. The code may be set by pressing PROGRAM, you are then prompted to enter your code. Pressing the REW or FF keys allows selection of the new code. Press PROGRAM again to store selection.

Remote interrogation is achieved by using a BT Remote Interrogator or MF4 telephone. Enter the two security digits during the announcement, and follow prompts. A full description is contained within the user guide.

On-site maintenance of the Response range is limited as the equipment contains no serviceable parts. Some routine servicing - detailed in the User Guide should be carried out by the customer, but field maintenance is restricted to checking the facility switch settings and testing the power unit output.

Several adapters used with Response instruments are marked with lower outputs than those actually measured. Approximate voltage readings (with the output open circuit) are as follows:-
Transformer 19B (marked 13.5V DC) measures 19 - 20v.
Transformer 752 (marked 9V AC) measures 11 - 12v.
Transformer 753 (marked 9.5V DC) measures 13 - 14v.


It has been reported that a large quantity of the Response range of TARMs have been returned as faulty without being fully reset and retried. Some faults are caused by quick line disconnects and Radio Frequency Interference and may be cleared by a reset.

Models such as the Response 200, 300, 400, 500 & 1000 have all got a reset button on the underside of the unit. Depressing this button momentarily, using a small probe, will perform a slightly different reset to that performed when the mains is turned off/on. It is suggested that this is performed first, then retry all facilities, before changing out the unit.

However, if after changing the unit the same fault recurs on the new unit, the problem may be site specific and changing the unit again will be of no advantage. If this is the case, please contact the Technical Helpdesk for further advise.

A major problem with Response TARMs recording after a message has been left has been caused by the exchange equipment presenting ‘clicks’ on the line when it is idle. This is due to a modified line card on System X exchanges. BT Labs are aware of the problem and are investigating a cure. Changing the unit will not clear this problem. 


BACK Home page BT/GPO Telephones Search the Site Glossary of Telecom Terminology Quick Find All Telephone Systems

Last revised: December 19, 2010