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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.
←