Table of Contents
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1 Technical Overview
Overview
This manual contains instructions for installing the DeskTop T1 DSU
and placing it into service.
DeskTop T1 DSU Features
The General DataComm DeskTop T1 Data Service Unit (DSU) is a
highly efficient means of transmitting and receiving digital data over
a T1 line supplied by a telephone company (Telco) or other service
provider. The DeskTop T1 DSU:
•
Provides interface to Fractional T1 (FT1) services, giving you the
flexibility to utilize only the bandwidth you need, from 56 Kbps
up to the full T1 rate of 1.536 Mbps
•
Allows the linking of FT1 services with traditional Dataphone
Digital Service (DDS) and generic digital services, including
support for ANSI T1.403 PN 127 loop up/loop down codes.
•
Supports one ITU-T V.35-compatible, high-speed, serial data
interface for customer equipment.
•
Permits configuration of network transmitter timing from a variety
of sources:
Timing recovered from network data
External timing
Internal clock
•
Supports Extended Superframe (ESF) and D4 framing formats;
also supports unformatted (unframed) operation, for use with
proprietary formats
•
Provides configurable Auto Framing option that automatically
adapts the DSU to ESF or D4 format
•
With ESF framing selected, supports both TABS Maintenance
Messages (Technical Reference 54016) and ANSI Performance
GDC 048R154-000
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