 Basic
network, low send level, push button push
button Trimphone for use on MF signalling systems. Based on the
Telephone
No.2/766 Mark 2 except that a 12 button push button unit and a line powered
oscilator replaces the rotary dial unit.Note the front of the casing is much higher than an ordinary
Trimphone, because of the size of the circuit board for the keypad.
Introduced in 1977.
Circuit diagram - N886.
Specification - S1340.
Telephone No. 8786
Introduced in 1982, the Telephone No. 8786 was a Telephone No. 786 modified to
work on the Plug and Sockets system. It was fitted with a
Resistor
No
91
EJ
3K3 and a Cord Connecting No. 4/504 Light Grey, 3000mm. The
Gas
Discharge
Tube
(Protector
11A) was also omitted.
The 8786RR was fitted with a Timed Break Recall button (Register Recall).
Additional Information
| Model |
Mark |
Blue |
Grey |
Green |
PBU |
Introduced |
Remarks |
| Tele 786 |
Mk 1 |
y |
y |
y |
52A/1 |
8/76 |
STC - was 1/766 |
| |
Mk 2 |
y |
y |
y |
52B/1 |
1/80 |
STC - was 1/766 (cost reduced) |
| |
Mk 3 |
y |
y |
y |
52A/2 |
10/78 |
GEC - was 2/766 |
| |
Mk 4 |
y |
y |
y |
52A/3 |
1/79 |
PYE - was 3/766 |
| |
Mk 5 |
y |
y |
y |
52C/1 |
8/79 |
STC - was 4/766 |
| |
Mk 6 |
y |
y |
y |
52B/2 |
2/81 |
GEC |
| |
Mk 7 |
y |
y |
y |
52B/3 |
|
PYE/TMC |
| |
Mk 8 |
y |
y |
y |
52A/4 |
|
PLESSEY |
| |
Mk 9 |
y |
y |
y |
52A/5 |
|
BTF |
| Tele 8786 |
Mk 1 |
y |
y |
y |
7A |
|
GEC |
| |
Mk 2 |
y |
y |
y |
54A/1 |
|
STC |
| |
Mk 3 |
y |
y |
y |
54A/4 |
|
PTL |
| |
Mk 4 |
y |
y |
y |
12A |
|
PYE-TMC |
| |
Mk 5 |
y |
y |
y |
54A/1 |
|
GEC |
| |
Mk 6 |
y |
y |
y |
54A/3 |
|
TMC |
| Tele 8786RR |
Mk 1 |
y |
y |
y |
7A |
|
GEC |
| |
Mk 2 |
y |
y |
y |
54A/1 |
|
STC |
| |
Mk 3 |
y |
y |
y |
54A/4 |
|
PTL |
| |
Mk 4 |
y |
y |
y |
12A |
|
PYE-TMC |
| |
Mk 5 |
y |
y |
y |
54A/1 |
|
GEC |
| |
Mk 6 |
y |
y |
y |
54A/3 |
|
TMC |
How to wire your Telephone No. 786 to make it work on Plug and Socket
|