Technical data

173
High-Speed Digital Subscriber Line Commands (HDSL)
The following HDSL commands are used to manage the HDSL link for an HDSL router.
General information about HDSL
Line activation
Line activation is independent of network settings. During activation, the Link light (on the front panel of
the router) is yellow and then turns green when the link becomes active.
The router at the CPE end will try auto-speed detection starting at 384 and try to the next higher speed
(for about 30 seconds per speed). The WAN light should turn yellow, then green when the link has
activated.
Auto-speed detection can be turned off with the command
hdsl speed noauto
.
If the line was previously set to “no auto-speed” (noauto), the Link light will be amber instead, when the
line tries to activate.
The
ifs
command displays the Link as either Off or Opened when successfully activated. Following is a
sample output.
Sample:
ifs
Interface Speed In % Out % Protocol State
Connection
ETHERNET/0 10.0mb 0%/0% 0%/0% (Ethernet) OPENED
HDSL/0 384kb 0%/0% 0%/0% ((HDSL) OPENED
CONSOLE/0 9600 b 0%/0% 0%/0% (TTY) OPENED
Auto-speed sequence
Auto-speed starts with the lower speed (384) and tries to activate for 30 seconds. If no activation takes
place, the next higher speed is attempted. The time intervals between activation may change if the
modems don’t activate as expected. Following is a correct activation output.
03/09/1998-17:11:59:HDSL: Deactivated
03/09/1998-17:12:22:HDSL: CPE is Activating at 384 Kb/s
03/09/1998-17:13:00:HDSL: Deactivated
03/09/1998-17:13:01:HDSL: CPE is Activating at 1168 Kb/s
03/09/1998-17:13:32:HDSL: Deactivated
03/09/1998-17:13:32:HDSL: CPE is Activating at 1168 Kb/s
03/09/1998-17:14:11:HDSL: Deactivated
03/09/1998-17:14:12:HDSL: CPE is Activating at 384 Kb/s
03/09/1998-17:14:51:HDSL: Activated
03/09/1998-17:14:53:FRAMER: The framer is synchronized