1.23 T1 Line Service Features
1.23.1 T1 Line Service
Description
The T1 line carries twenty-four 64 kbps-voice channels at 1.5 Mbps transmission speed as a trunk or private
line. Voice is digitised by Pulse Code Modulation (PCM).
1. Channel Type
[LCOT/GCOT/DID/TIE/OPX]
The T1 card supports five different channel types to provide connection at minimum expense. One of the
five channel types can be assigned to one of the 24 channels of the T1 card individually according to tariffs
and customer needs.
2. T1 Features
The following table shows the features available for each channel type:
[Feature Table]
Channel Type
(1) (2) (3) (4) (5)
TIE DID DIL OPX ANI
LCOT
ü
GCOT
ü
DID
ü ü ü
TIE (E & M)
ü ü ü ü
OPX
ü
ü: Available
[Explanation]
Number in the
Table
Feature Description
(1) TIE Line Service
Refer to the TIE Line Service feature. (® 1.30.1 TIE
Line Service)
(2) Direct Inward Dialling
(DID)
Refer to the DID feature. (® 1.1.1.3 Direct Inward
Dialling (DID)/Direct Dialling In (DDI))
(3) Direct In Line (DIL)
Refer to the DIL feature. (® 1.1.1.2 Direct In Line
(DIL))
Feature Guide 255
1.23.1 T1 Line Service
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