Appendix C - Connector Pinouts

C-1

Appendix C - Connector Pinouts

Phone Jack Pinouts

The Omni 288S is equipped with two RJ11 phone jacks:

1. one for the dail-up line connection (LINE)

2. one for an optional connection to a phone set (PHONE)

The signals for these pins are:

1A
2 RING
3 TIP
4A1

The signals A and A1 are used with the KTS (Key Telephone Systems).

PC Serial Port Pinouts

Signal
Pin ITU-TSS
Signal Name EIA
Signal Name Pin/Signal
Description Direction
DTE-DCE
1 101 AA Protective Ground (GND).
2 103 BA Transmitted Data(TXD).
3 104 BB Received Data(RXD).
4 105 CA Request To Send (RTS).
5 106 CB Clear To Send (CTS).
6 107 CC Data Set Ready (DSR).
7 102 AB Signal Ground (GND).
8 109 CF Data Carrier Detected
(DCD).
15 114 DB Transmit Clock Signal
(source: DCE).
17 115 DD Synchronous Receive Clock.
18 141 Local Analog Loopback Test.
20 108/2
108/1 CD Data Terminal Ready (DTR).
Connect DCE to line
21 140 Remote Digital Loop Test.
22 125 CE Ring Indicator(RI).
24 113 DA Transmit Clock Signal
(source: DTE).
25 142 Test Indicator.