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SpecificationsPassport 4400 Hardware Installation Manual
C-4
The following specifications pertain to the E1 Voice Module, single port.
Analog Voice Modules
The following specifications are common to all FXS, FXO, and E&M interface
types:
Common Specifications
E1 Interface L1 (local)
With the exception of drop-and-insert and
bypass, the single-port E1 unit model has the
same capabilities as the dual port model.
Signals Supported: Analog voice and Group 3 facsimile
Fax Signal Types: V.21 channel 2, V.27 ter 2400, V.27 ter 4800, V.29
7200, and V.29 9600
Modem Signal Types: V.22 and V.22 bis
Port Impedance (FXS,
FXO and E&M 2-wire)
Software selectable for either 600 ohms or for
complex impedance
Insertion loss at 1004 Hz
FXS and FXO:
2 dB nominal between transmit and receive of port
1 and transmit and receive of port 2
E&M: 2 dB nominal between T/R of port 1 and T/R of port
2 (2-wire) or between T/R of port 1 and T1/R1 of
port 2 (4-wire)
Port Return Losses:
Echo:
Singing:
204 to 3400 Hz:
>22 dB
>
18 dB
>
16 dB
Input Level Gain: Adjustable from -6 dB to +19 dB in 1 dB
increments
Output Level
Attenuation:
Adjustable from 0 dB to 25 dB in 1 dB increments
Input and Output Level
Adjustment
Restrictions:
If your equipment is operated in the U.S.A. or
Canada, input and output levels must be set to 0
dB.