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-GB20-10
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 CCITT Recommendation G.703 and the frame structure
of CCITT 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 1996
Function
Introduction
1-5