Lucent Technologies Definity Enterprise Communication Server 8.2 Manual De Usuario
DEFINITY ECS Release 8.2
Administrator’s Guide
Administrator’s Guide
555-233-506
Issue 1
April 2000
Managing data calls
422
Wideband Switching
15
The following table provides information on Wideband Switching channel types.
Channel allocation
For standard narrowband communication, ISDN-PRI divides a T1 or E1 trunk as
follows:
follows:
■
T1 trunks are divided into 23 information channels are 1 signaling channel
■
E1 trunks are divided into 30 information channels, 1 signaling channel,
and 1 framing channel
and 1 framing channel
Certain applications, like video conferencing, require greater bandwidth. You can
combine several narrowband channels into one wideband channel to
accommodate the extra bandwidth requirement. DEFINITY ECS serves as a
gateway to many types of high-bandwidth traffic. In addition, DS1 converters are
used for wideband switching at remote locations.
combine several narrowband channels into one wideband channel to
accommodate the extra bandwidth requirement. DEFINITY ECS serves as a
gateway to many types of high-bandwidth traffic. In addition, DS1 converters are
used for wideband switching at remote locations.
Performed using one of the three allocation algorithms: fixed, flexible, or floating.
■
Fixed allocation — Provides contiguous-channel aggregation. The starting
channel is constrained to a predetermined starting point. (Used only for H0,
H11, and H12 calls.)
channel is constrained to a predetermined starting point. (Used only for H0,
H11, and H12 calls.)
■
Flexible allocation — Allows a wideband call to occupy non-contiguous
positions within a single T1 or E1 facility (NxDS0).
positions within a single T1 or E1 facility (NxDS0).
■
Floating allocation — Enforces contiguous-channel aggregation. The
starting channel is not constrained to a predetermined starting point
(NxDS0).
starting channel is not constrained to a predetermined starting point
(NxDS0).
Channel Type
Number of Channels (DSOs)
Data Rate
H0 (T1 or E1)
6 (grouped 4 (T1) or 5 (E1) quadrants
of 6 B-channels each)
of 6 B-channels each)
384 Kbps
H11 (T1 or E1)
24 (on T1 - all 24 B-channels, with
the D-channel not used; on E1 -
B-channels 1 to 15, and 17 to 25, and
B-channels 26 to 31 unused)
the D-channel not used; on E1 -
B-channels 1 to 15, and 17 to 25, and
B-channels 26 to 31 unused)
1536 Kbps
H12 (E1 only)
30 (B-channels 1 to 15 and 17 to 31)
1920 Kbps
NxDS0 (T1)
2-24
128–1536 Kbps
NxDS0 (E1)
2-31
128–1984 Kbps