The Cisco Second-Generation (VWIC2-xMFT-T1/E1 ) also requires a card type configuration, where you can select either T1 or E1 as the card type.
Issue the router(config)# card type {t1 | e1} <slot no> command to set or change the card type.
Note: When this command is used for the first time, the configuration takes effect immediately.
Note: A subsequent change in the card type does not take effect unless you enter the reload command or reboot the router.

прочел вот здесь:
http://www.cisco.com/en/US/tech/tk652/tk90/technologies_tech_note09186a00801d11a3.shtml