The WIC-1DSU-T1 is a service module - it always appear as serial0/0 or whatever, and if you do anything with timeslots you are just adjusting the number used for this one serial interface.
The NM-1CT1 is a channelized T1 interface. You must configure one or more channels in a channel group, then they get assigned to a virtual serial interface. In the bad old days before frame relay people used to get 56k leased lines for remote offices and aggregate them all by having a channelized T1 delivered with each DS0 being a separate circuit to a remote. One additional use for the channelized interfaces that I am aware of is attachment to digital modem modules like the NM-xxDM. There may be others, but that is the one that comes to mind first. If you don't know why you might want an NM-1CT1, you need a WIC-1DSU-T1 :-) neil K wrote: > > Can somebody explain when I can use WIC-1DSU-T1 over NM-1CT1 or what exactly > are the difference except that WIC-1DSU-T1 has a built-in DSU/CSU where as > NM-1CT1 is a T1 Module. > > Thanks in advance. > > neil > **Please support GroupStudy by purchasing from the GroupStudy Store: > http://shop.groupstudy.com > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html -- mailto:[EMAIL PROTECTED] phone:402-301-9555 "After all that I've been through, you're the only one who matters, you never left me in the dark here on my own" - Widespread Panic Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=74750&t=74741 -------------------------------------------------- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
