Verilink AS56/56Plus (896-502588-001) Product Manual - Manual (Page 117)

Multi-Configurable Serial Port
AS56 and AS56 Plus User Manual A-3
Multi-Configurable Serial Port
The Access Syst em56 Serial Port is a multi-configurable port in which
the interface may be defined as either V.35, RS-530/RS-422A, or RS-232.
The serial port interface provides a DB-25 pin receptacle. The pin
assignments for the serial port interface are listed below.
Pin RS23 RS53 V.35
1 chassis chassis chassis
2 TXD out TXD- TXD-
3 RXD in RXD- RXD-
4 RTS out RTS- RTS-
5 CTS in CTS- CTS-
6 DSR in DSR- DSR-
7 signal gn signal gnd signal gnd
8 DCD i DCD- DCD-
9 (voltage+) RXC- RXC-
10 (voltage-) DCD+ not used
11 not used EXT TXC+ EXT TXC+
12 not used TXC+ RXC+
13 not used CTS+ TXD+
14 not used TXD+ TXC+
15 TXC in TXC- TXC-
16 not used RXD+ RXD+
17 RXC in RXC+ RXC+
18 not used not used not used
19 not used RTS+ not used
20 DTR out DTR- DTR-
21 not used not used not used
22 (RI) DSR+ not used
23 not used DTR+ not used
24 EXT TXC out EXT TXC- EXT TXC-
25 not used not used not used