Telco-Initiated Tests; Telco-Initiated Line Loopback; Telco-Initiated Payload Loopback - Paradyne 8779 User Manual

Telco-Initiated Tests

Hotwire 8777 Termination Units support Telco-initiated tests, as shown in the
following table.

Telco-Initiated Line Loopback

Hotwire 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.

Telco-Initiated Payload Loopback

Hotwire 8777 Termination Units support payload loopback, as specified in AT&T
TR 54016 and ANSI T1.403. A Telco-initiated line loopback loops the received
signal on the DSX-1 interface back to the DSX-1 interface. Framing, CRC, and
FDL bits are regenerated at the point of the loopback, and BPVs are removed.
DSL time slots mapped to the DSX-1 port are sent all ones.
8700-A2-GB20-40
Activation and Line
Deactivation Loopback
In-Band Signal Supported
Bit-Oriented Supported
Message-Oriented Not Applicable
CAP
DSL
All Ones
Port
Transceiver
CAP
DSL
All Ones
Port
Transceiver
May 2002
Payload
Loopback
Not Applicable
Supported
Not Supported
CAP T1
LIU
Framer Framer
CAP T1
LIU
Framer Framer
8. Testing
Remote Line
Loopback
Not Supported
Supported
Not Applicable
DSX-1
Telco
Port
99-16252
DSX-1
Telco
Port
99-16253
8-11