1.20 T1 Line Service Features
150 Feature Guide
1.20 T1 Line Service Features
1.20.1 T1 Line Service
Description
A T1 line carries twenty-four 64 kbps-voice channels at 1.5 Mbps, and can be used as a public or private
line. Voice is digitized 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 any one of the T1 card's 24 channels individually, according
to usage rates and customer needs.
2. T1 Features
The following table shows the features available for each channel type:
Each T1 feature is explained in the following chart.
Feature Description
(1) TIE TIE Line Service Refer to the TIE Line Service feature. (→ 1.27.1 TIE Line Service)
(2) DID Direct Inward
Dialing (DID)
Refer to the DID feature. (→ 1.1.1.3 Direct Inward Dialing (DID))
(3) DIL Direct In Line (DIL) Refer to the DIL feature. (→ 1.1.1.2 Direct In Line (DIL))
(1) TIE (2) DID (3) DIL (4) OPX (5) ANI
Feature
LCOT
GCOT
DID
TIE (E & M)
OPX
Channel Type
Available
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