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Testing
8-11
8700-A2-GB20-00
April 2000
Telco-Initiated Tests
Hotwire 8747 and 8777 Termination Units support Telco-initiated tests as shown
in the following table.
Activation and
Deactivation
Line Loopback Payload Loopback
Remote Line
Loopback
In-Band Signal Supported Not Applicable Not Supported
Bit-Oriented Supported Supported Supported
Message-Oriented Not Applicable Not Supported Not Applicable
Telco-Initiated Line Loopback
Hotwire 8747 and 8777 Termination Units support line loopback as specified in
AT&T TR 54016, AT&T TR 62411, and ANSI T1.403. A Telco-Initiated Line
Loopback loops the received signal on the DSX-1 interface back to the DSX-1
interface without modification. Framing, CRC, and FDL bits are returned
unaltered, and no BPVs or other line coding errors are removed. DSL time slots
mapped to the DSX-1 port are sent all ones.
CAP
DSL
Port
DSX-1
Port
CAP T1
LIU
FramerFramerTransceiver
99-16252
All Ones
Telco