Paradyne 3172 Operator's Manual page 15

Name
POWER
AUX PORT
COM PORT
DTE
NETWORK—120
NETWORK—75 TX/RX
NETWORK—120 /75 (switch)
NETWORK—RX SHIELD (switch)
CLOCK IN
PORTs 1– 4
3170-A2-GB20-30
Table 1-1
Rear Panel Connectors and Switches
Supplies power to the E1 DSU/CSU by providing an attachment for the ac power
module or the optional dc power cable (+24 or – 48 Vdc).
Supports SNMP LAN Adapter or daisy-chain connections.
Provides access to a locally connected PC, an ASCII terminal or printer, or an
SNMP management link.
Provides access to the DTE Drop/Insert interface. This interface is compatible
with the signal format of ITU-T Recommendation G.703 and the frame structure
of ITU-T Recommendation G.704.
Provides an unkeyed modular jack for a 120-ohm balanced network interface.
Provides two BNC connectors (Transmit and Receive) for a 75-ohm unbalanced
network interface.
Selects either a 120-ohm balanced network interface or a 75-ohm unbalanced
network interface.
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.)
Used to attach an external clock to the E1 DSU/CSU.
Used to connect the customer's synchronous data DTE to the E1 DSU/CSU.
March 1999
Function
Introduction
1-5