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3
Cabling Examples
The DSU/CSU is supplied with an AC power module. You must provide the DTE and
network cables.
Optional cables that you can order from the company are described in
Pin Assignments
in the Operator’s Guide.
NOTE:
The 120Ω/75Ω switch selects either the 120-ohm balanced network interface or the
75-ohm unbalanced network interface. The RX SHIELD switch selects either an
“open” or “earth” shield connection for the 75-ohm RX interface. (This switch must
be set to “open” when using the 120-ohm interface.)
POWER
AUX
PORT
COM
PORT
DTE
PORT 3 PORT 4
PORT 1 PORT 2CLOCK IN
120ý
75ý
75ý
120ý
RX SHIELD
OPEN
EARTH
RX
75ý
TX
NETWORK
CAUTION: AUX PORT OR COM PORT MUST NOT BE
CONNECTED TO PSTN OR E1 NETWORK
POWER
AUX
PORT
COM
PORT
DTE
PORT 1 PORT 2CLOCK IN
120ý
75ý
75ý
120ý
RX SHIELD
OPEN
EARTH
RX
75ý
TX
NETWORK
CAUTION: AUX PORT OR COM PORT MUST NOT BE
CONNECTED TO PSTN OR E1 NETWORK
98-14673a
NETWORK
TO AC
POWER
MODULE
TO DC
POWER
(OPTIONAL)
3100-F1-550
3100-F1-540
FRONT
PANEL
DSU/CSU
DSU/CSU
DSU/CSU
SERIAL
PORT
COM PORT
NETWORK
COM PORT
NETWORK
3100 SERIES
FRONT PANEL
EMULATION
SOFTWARE,
3100-C1-010
NOTE:
3100-F1-520
NETWORK
SNMP
MANAGER
OR