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Technical Overview
1-3
The full T1 bandwidth is available when consecutive DS0s are used,
but restrictions on ones density may limit the actual usable bandwidth.
Use of consecutive DS0s for N x 64 Kbps requires either B8ZS coding
on the network line or provisioning in the DTE to guarantee mark
density requirements.
Using alternate DS0s reduces the T1 bandwidth available for user data
by one-half, but it eliminates restrictions on the content of user data.
When the DSU is configured to use alternate DS0s it maintains
minimum ones density at 50% by filling the unused DS0s with ones.
DTE Interface
The DeskTop T1 DSU provides DTE interface through an ITU-T
V.35-compatible port for connection to synchronous serial customer
equipment. Examples of customer equipment are Front End
Processors (FEPs), Local Area Network (LAN) bridges, video codecs,
CAD/CAM workstations, and Group 4 facsimile equipment.
GDC 048R154-000
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