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Specifications Passport 4400 Hardware Installation Manual
C-9
ISDN BRI Voice Module
The following specifications pertain to the ISDN BRI Voice Module.
Interface Type: Basic Rate Interface (BRI)
Number of Channels: 2 B-channels, 1 D-channel
B-Channel: Each B-channel carries PCM-coded voice at a rate of
64 kb/s
D-Channel: The D-channel carries signaling information for both
B-channels at a rate of 16 kb/s.
Signaling Type: ETSI QSIG, utilizing the Basic Call (BC) protocol
Interface Emulation: In its present application, the unit will be strapped
for NT, connecting to the trunk side (TE) of an ISDN
PBX.
Indicators: Three green front-panel LED indicators, monitoring
the activities of the 2 B-channels and the D-channel.
See Table 1-1 for details
Number of Switches: 2 switch groups
Module Location: This switch group is used to set the logical slot
location that the module occupies within the
Passport 4400 unit.
Port Termination: This switch group is used to set the input impedance
of the BRI port; default value is 100 W
Input Power
Requirements:
+5 volts at 0.4 ampere (2 watts) maximum
Dimensions
Width:
Depth:
Height:
24.13 cm. (9.5 inches)
26.04 cm. (10.25 inches)
2.54 cm. (1 inch) maximum