8. Testing
8700-A2-GB20-40
May 2002
8-11
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.
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
CAP
DSL
Port
DSX-1
Port
CAP
T1
LIU
Framer
Framer
Transceiver
99-16252
All Ones
Telco
CAP
DSL
Port
DSX-1
Port
CAP
T1
LIU
Framer
Framer
Transceiver
99-16253
All Ones
Telco
Summary of Contents for Hotwire 8777
Page 22: ...2 Using the Asynchronous Terminal Interface 2 10 May 2002 8700 A2 GB20 40 ...
Page 36: ...3 Initial Startup and Configuration 3 14 May 2002 8700 A2 GB20 40 ...
Page 44: ...4 Cross Connecting Ports 4 8 May 2002 8700 A2 GB20 40 ...
Page 52: ...6 Security 6 6 May 2002 8700 A2 GB20 40 ...
Page 96: ...9 Transferring Firmware and Configurations Using TFTP 9 6 May 2002 8700 A2 GB20 40 ...
Page 148: ...C Connector Pin Assignments C 4 May 2002 8700 A2 GB20 40 ...
Page 150: ...D Technical Specifications D 2 May 2002 8700 A2 GB20 40 ...