Config when upgrading T1 speed?

[bobcat]

We recently upped our T1 data speed from 256k to 768k. We're using a external CSU/DSU which is connected to the serial port on our Cisco 1601r. Is there any config needed on the 1600 when we change the speeds?

 

[eurobadger]

Hi

If you are getting the clock from the DCE (which is default) then there should be no changes.

EB

 

[bobcat]

How would I find out if I am?

 

[eurobadger]

Look in the running config under the T1 controller for an entry along the lines of "clock source line".

Alternatively you should see reference to it in the output of &quot;show Controller T1 <number>&quot;

EB

 

[bobcat]

Actually, sorry, we have a T1 line but it connects over frame-relay. I don't see anything about the clock source line in my config. Should that be there if we're connected to a frame?

 

[MattWray]

Try looking for Service Module Time Slots. 256 would be 4, and 768 will need to be 12....

Thanks,

Matt Wray
MCSE, MCSA, MCP, CCNA

http://www.sss-steel.com

http://www.total-tec.com

 

[eurobadger]

Hi

The default is to take the clocking from the DCE device, including on frame-relay, so there may well not be a config entry.

There is a show service module T1 commnad. Have a look at:

http://www.cisco.com/en/US/products...ducts_tech_note09186a0080093c68.shtml#command

EB

 

[bobcat]

Since the CSU/DSU is an external one (AT&T Paradyne) I don't have the 'show service-module' command. The Paradyne is setup to where it should be, though.

 

[Bobg1]

Bobcat
You didn't change your speed.
You changed the bandwidth for the allocated PVC
which means you providor will aloow more stuff to be pushed all at once.