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8-2 Dialable Wideband Service
Figure 8-1
Relationship of DTCIs, channels, and spans
Trunk types
The following trunk types, shown in Figure 8-2, are used in DWS:
297-2521-106 Standard 23.01 March 2001
DMS-250
switch
DTCI
primary rate interface (PRI)
ISDN user part intermachine trunk (ISUP-IMT)
ISUP FGD
T1 spans
(up to 20 per DTCI)
T1
(1)
T1
(2)
.
.
.
(19)
T1
T1
(20)
DS-0
channels
(24 per T1 span)
1
2
.
.
.
23
24
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