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2Modem/DSU Commands
2-656800-A2-GB31-20 January 1997
Change Port Speed(s) (chpsp)
(Disruptive)
Use the chpsp command to change the port speed configuration of the TDM ports on a
COMSPHERE 3400/4400 Series modem. This command allows you to set each port’s optimum
and fallback speeds. Port speeds vary according to the device type. Refer to the individual device
documentation for specific information on the port speeds available.
For most commands, NMS enables you to specify the destination for the command’s results and
schedule its execution. If the last page of the input form cannot accommodate the Destination for
results and Schedule execution fields, an additional page is provided. For a complete description
of these fields, refer to Chapter 1, Introduction.
Access Level: Data Technician, Manager, System Administrator
Abbreviation: chpsp
Alternate: chportsp
Restrictions: For any particular device speed, the sum of the port speeds cannot exceed
the maximum line speed supported by the device.
When changing port speeds, any port that has been configured to receive an
external clock source must always be active. Do not disable the port. Do
not set the port speed to zero.
For devices set in CCITT Modulation mode, do not set any of the port
speeds to 1200 bps or below.
Routine: Yes
Schedule: Yes
Related Commands: Change Options (cho)
Change Port Options (chpo)
Display Options (dso)
Display Port Options (dsop)
Display Port Speed(s) (dspsp)
Change Port Speed(s) Input Forms
There are multiple pages for the Change Port Speed(s) input form.
Page 1
Page 1 enables you to identify the device for which port speeds are to be changed.
This input form contains the following fields:
Device (Required field)
Enter the device whose port speeds are to be changed. Standard addressing format applies
to the input. For information on device addressing, refer to Appendix D of the
COMSPHERE 6800 Series Network Management System User’s/System Administrator’s
Guide.