Hicom 120 MDF
Keystation and Single Line telephones are connected to blocks X10 - X20 (a,b,c,d)
Central ringer connected to block X20 (GND & ZTRW)
Trunks are connected to block X4 & X5 (AL1 & BL1 - AL8 & BL8)
External Paging is connected to block X6 (P1 & P2)
External Music on Hold is connected to block X20 (MOH1 & MOH2)
V24 socket is connected to block X6
S100 is the reset button - warm start
RS232 plug connections
The V24/printer port is located behind the lower chassis. This D type, 25 way female, connector is wired as per the table below. The wiring is normally labelled in pairs of white and brown wires. The wires connect to the X6 terminal block on the MDF.
| X6 Terminals |
P1 |
GRD | RXD | CTS | GRD |
| P2 | TXD | RTS | DSR | DTR | |
|
Pair number and colour |
Note Used |
1WH - 1BN |
2WH - 2BN | 3WH - 4WH | 3BN - 4BN |
| D type connector pin | 1 - 2 | 3 - 4 | 5 - 7 | 6 - 20 |
D Type Connector pin numbering (looking from the front)
13 - 12 - 11 - 10 - 9 - 8 - 7 - 6 - 5 - 4 - 3 - 2 - 1
25 - 24 - 23 - 22 - 21 - 20 - 19 - 18 - 17 - 16 - 15 - 14
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