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Specifications Passport 4400 Hardware Installation Manual
C-3
The following specifications pertain to the T1 Voice Module, single port.
E1 Voice Module
The following specifications pertain to the E1 Voice Module, dual port.
T1 Interface: DS-1 (network)
With the exception of drop-and-insert and bypass, the
single-port unit has the same capabilities as DS-1
interface of the dual port module.
Interfaces: 2; L1 (local) and L2 (network)
2.049 Mb/s digital interface
Connector: 75 ohms BNC (4)
120 ohms DB-9 (1)
L1
Number of DS0 Channels: 30 @ 64 kb/s
Interface Termination: Strappable for either 75 ohm or 120 ohm
termination
75 Ohm Connectors: 2 BNC coaxial connectors, one each for input
and output wire pair
120 Ohm Connector: 9-pin DB-9 connector
Receiver Sensitivity: -34 dBm
Drop and Insert: All 30 DS0 channels may be passed directly
between the L1 and L2 interfaces or dropped
and inserted to/from the Passport 4400
resources.
L2 Identical to L1 in all respects
Data Ports: 2; DP1 and DP2 @ 512 kb/s maximum (each).
Strappable for RS-232/V.24, X.21, and V.35
interface types.
Connector: DB-25 female
Digital Voice Modules: 30 maximum; six are optionally mounted on the
TVM; additional modules are optionally
mounted on adjacent Digital Voice Expansion
Modules. Each Digital Voice Module processes
one DS0 voice channel.
Please note power supply requirements at the
end of this chapter.