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COMSPHERE 3550 Series Data Service Units
D-6 March 1999 3550-A2-GB20-30
99-16294
Figure D-4. V.35 Adapter (3000-F1-510)
Table D-6
V.35 Connector Pin Assignments
25-Pin Connector
(Rear Connector
Plate)
34-Pin Connector
(V.35 Adapter)
Circuit Name
Pin Number Pin Number
7 B Signal Ground
4 C Request-to-Send (RTS)
5 D Clear-to-Send (CTS)
6 E Data Set Ready (DSR)
8 F Received Line Signal Detect (LSD)
20 H Data Terminal Ready (DTR)
21 J Ring Indicator (RI)
18 L Local Loopback (LL)
19 N Remote Digital Loopback (RL)
24, 11 P, S Transmit Data (TXD)
23, 22 R, T Received Data (RXD)
15, 2 U, W Transmitter Signal Element Timing – DTE Source
16, 3 V, X Receiver Signal Element Timing – DCE Source
14, 1 Y, AA Transmitter Signal Element Timing – DCE Source
9 HH Positive DC test voltage
10 KK Negative DC Test Voltage
25 NN Test Mode (TM)