comp.dcom.sys.cisco

Hi,

i have a cisco router :

Model Cisco 2610XM IOS = c2600-IPBASE-M Version 12.3(6e)

This router use a controller E1 (Channalized E1 Version 1.0).

i need to use this commande on controlleur E1 : clock source line primary

But the router not recognize it !!

When i type : "clock source line" and i press TAB, the possible parameters are printed, so "primary" or "internal". But when i type de full commande, the router not recognize my command !!! can you tell me why please ?

Thank You very much for your help

Best Regards Rahan