COMSPHERE 3600 Series Data Service Units
C-10 March 1999 3610-A2-GB41-60
Table C-4
EIA-232-D/V.24 Connector (Port 1)
Pin
Circuit Name
F nction
Pin EIA-232-D CCITT/V.24 Function
2 BA 103 Transmit Data (TXD)
3 BB 104 Received Data (RXD)
4 CA 105 Request-to-Send (RTS)
5 CB 106 Clear-to-Send (CTS)
6 CC 107 Data Set Ready (DSR)
7 AB 102 Signal Ground (SG)
8 CF 109 Received Line Signal Detect (LSD)
9 — — Positive Test Voltage
10 — — Negative Test Voltage
12 CI 112 Data Signal Rate Selector I — DCE Source (alternate external
control lead I)
131— — Data Signal Rate Selector II — DCE Source (alternate external
control lead II)
15 DB 114 Transmitter Signal Element Timing — DCE Source
17 DD 115 Receiver Signal Element Timing — DCE Source
18 LL 141 Local Loopback (LL)
191— — Data Signal Rate Selector II — DTE Source (alternate external
control alarm Lead II)
20 CD 108.2 Data Terminal Ready (DTR)
21 RL 140 Remote Digital Loopback (RL)
22 CE 125 Ring Indicator (RI)2
23 CH 111 Data Signal Rate Selector I — DTE Source (alternate external
control alarm Lead I)
24 DA 113 Transmitter Signal Element Timing — DTE Source
25 TM 142 Test Mode (TM)
1The Data Signal Rate Selector functions are not supported for leads 13, 19, and 23. These leads can be
used for the external lead functions.
2Ring Indicator is only available on a DBM-V, DBM-S, or DBM-D at this time.