CHASSIS
940043-002 INTEGRATED ENTERPRISE NETWORK 2-29
V.24 RS232C
Table 2-9 lists the DB25 pin assignments for a V.24 RS232C physical interface.
Table 2-9 DB25 (V.24 RS232C)
Note: The CID15H uses pin 24 to provide clocking when set to internal clock. The CID61 and
CID63 port processors provide clock on pin 15 when set to internal clock.
PIN V.24 RS232C Pin Assignment Key
1Frame Ground FG
2 Transmit Data TD
3Receive Data RD
4 Request To Send RTS
5 Clear To Send CTS
6 Data Set Ready DSR
7 Signal Ground SG
8 Data Carrier Detect DCD
9Pin not used N/A
10 Pin not used N/A
11 Pin not used N/A
12 Pin not used N/A
13 Pin not used N/A
14 Pin not used N/A
15 Transmit Clock TC
16 Pin not used N/A
17 Receive Clock RC
18 Pin not used N/A
19 Pin not used N/A
20 Data Terminal Ready DTR
21 Pin not used N/A
22 Ring Indicator RI
23 Pin not used N/A
24 External Transmit Clock ETC
25 Pin not used N/A
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