Configuration Options
C-9
3162-A2-GB20-30 March 1999

Table C-3. Sync Data Port Configuration Options (4 of 5)

Port (DTE) Initiated Loopbacks: Disable (Factory 1) Both (Factory 2)
Disable DTLB DCLB Both
Allows the initiation and termination of a local Data Terminal Loopback (DTLB) or
remote Data Channel Loopback (DCLB) by the DTE connected to this port. (DTLB is
equivalent to a V.54 loop 3, and DCLB is equivalent to a V.54 loop 2.) Control of these
loopbacks is through the DTE interchange circuits as specified by the V.54 standard.
Disable – Disables control of local DTLBs and remote DCLBs by the DTE connected to
this port.
DTLB – Gives control of the local DTLBs for this port to the DTE attached to this port.
This loopback is controlled by the Local Loopback interchange circuit LL (CCITT 141).
DCLB – Gives control of the remote DCLBs for the far-end port connected to this port to
the DTE attached to this port. This loopback is controlled by the Remote Loopback
interchange circuit RL (CCITT 140). The far-end equipment must support in-band V.54
loopbacks.
Both – Gives control of local DTLBs and remote DCLBs to the DTE connected to this
port.
Near-End Performance Statistics: Disable
Disable Maintain Send Both
Specifies whether the DSU/CSU maintains near-end performance statistics and sends
performance report messages (PRMs) for a particular port.
Disable – Disables near-end performance statistics and does not send PRMs.
Maintain – Maintains near-end performance statistics for this port.
Send – Sends PRMs over the port’s EDL every second. Each PRM contains the
performance statistics for the previous 4 seconds.
Both – Maintains near-end performance statistics and sends PRMs over the port’s EDL.
NOTES: – This configuration option is not available if EDL is disabled.
– If the local DSU/CSU is configured to send near-end performance
statistics, then the remote device must be configured to maintain
far-end performance statistics.
Far-End Performance Statistics: Disable
Disable Maintain
Specifies whether to monitor for far-end performance report messages (PRMs) and
maintain far-end performance registers for a particular port.
Disable – Disables far-end performance statistics.
Maintain – Monitors the port’s EDL for PRMs and maintains far-end performance
statistics.
NOTES: – This configuration option is not available if EDL is disabled.
– If the local DSU/CSU is configured to maintain far-end performance
statistics, then the remote device must be configured to send near-end
performance statistics.