Enterasys Networks CSX6000 - Manual (Page 65)

Central Site Remote Access Switch 65
H ARDWARE O VERVIEW
System Adapters
Pin and Signal Assignments for the V.35 Connection
RS232 A DAPTER
The RS232 adapter provides four RS232 ports. The card contains two female DB26 connectors. An
RS232 adapter cable converts the DB26 connection to two standard RS232 connections. Using the
RS232 adapter cable, DB26 port # 1 becomes RS232 port # 1A and port # 1B. You can configure each
port pair (1A,1B or 2A,2B) for DTE (external clocking) or DCE (internal clocking), and each port
supports data rates from 2.4 Kbps to 56 Kbps.
The RS232 supports network side connections, providing dedicated connections to other systems.
The adapter can take advantage of slower speed analog lines by using standard synchronous
analog modems. The RS232 also supports private network connections through a T1 multiplexer or
a channel bank.
V.35 Pin Signal Function V.35 Pin Signal Function
A Chass ChassisGround V RXCB Receive Clock B
B Gnd Signal Return W NC No Connect
C RTS Request to Send X RXCA Receive Clock
D CTS Clear to Send Y TXCB Transmit Clock B
E DSR Data Set Ready Z NC No Connect
F DCD Data Carrier
Detect
AA TXCA Transmit Clock
A
H DTR Data Terminal
Ready
BB NC No Connect
J RI Ring Indicator CC NC No Connect
K LT Local Test DD NC No Connect
L NC No Connect EE NC No Connect
M NC No Connect FF NC No Connect
N NC No Connect HH NC No Connect
P TDB Transmit Data B JJ NC No Connect
R RDB Receive Data B KK NC No Connect
S TDA Transmit Data A LL NC No Connect
T RDA Receive Data A MM NC No Connect
U NC No Connect NN NC No Connect