Hello folks -
I have a Cisco 2821 router. Below is the sh version output. This router has a channelized T1/E1 WIC (2 ports). I want to configure a serial (T1) interface on this router but don't have the option to do it. Not sure what am I missing here.
In other words, from the config mode, I can't issue the command: interface serial xxx
Cisco 2821 (revision 53.51) with 249856K/12288K bytes of memory.
Processor board ID FTX1106A037
2 Gigabit Ethernet interfaces
2 Channelized (E1 or T1)/PRI ports
2 Virtual Private Network (VPN) Modules
DRAM configuration is 64 bits wide with parity enabled.
239K bytes of non-volatile configuration memory.
62720K bytes of ATA CompactFlash (Read/Write)
Configuration register is 0x2102
You need to tell your router about the card - see this link
You need to tell the card what mode it should operate in, using the "card type" command
i.e. you want to use it as an E1 card, use the command:
card type e1 0
(the 0 is for the slot number it is inserted into)
Once you do that, then you need to set the number of channels by configuring the controller :
controller e1 0 0
channel-group 0 timeslots 1-31
Note - you need to have enough DSP channels to cover the number of timeslots you are configuring. Also, the number of timeslots (31) is the maximum number available on an ISDN30e (E1) line; you need to set the number to match the number of channels you have subscribed to on your line.
Once you do that, then the router will add all the Serial interfaces you are looking for to the configuration.
Hope this helps!