Specifications

Installation and Configuration Activities 39
5. Configure long- and short-haul specific parameters. (Long haul has a CSU
onboard; short haul does not.) For T-1 long haul, configure the Line Build Out
parameter.
The available choices, in dB, are:
•-7.5
•-15
•-22
For example:
DSUB LBO 0 -7.5
To use -15 or -22, instead, replace -7.5 in the command line above with one of
these selections.
6. For T-1 short haul, configure the Distance parameter. The choices are:
• 133-266
• 366-399
• 399-533
• 533-655
For example:
DSUB DISTANCE 0-133
To use a different distance parameter, instead, replace 0-133 in the command
line above with the desired distance parameter.
7. Configure DSUB-to-DVFAX channel mapping. Map T-1/E-1 DS0s that are used
in the application to the desired voice channels. For example, an application
that uses DS0 #1 for voice traffic handled by DVFAX channel V1A requires the
following command:
DSUB MAP 1 V1A
When you complete all of the mapping, you must activate it by issuing the
following command:
DSUB SWITCH
When reconfiguring, you can also unmap channels. To change the above
application from using V1A to V2A, for example, issue the following commands
in the order shown.
At the console enter the following commands:
DSUB UNMAP 1
DSUB MAP 1 V2A
DSUB SWITCH
8. Issue the following command to confirm all configurations by viewing the
active configuration and mapping:
SHOW CONFIG DSUB ACTIVE
If necessary, remap and reconfigure using the above steps. You can confirm
any new mapping before applying it.
The following command shows the map that will be activated by the switch:
SHOW CONFIG DSUB 1
9. Turn on the DSUB:
DSUB ON