Hello,
first of all, you need at a minimum release15.0(1)M3, 15.1(1)T1, 15.1(2)T.
Here are the summary steps for configuring the card:
Configuring the T1/E1 VWIC3s
Perform this task to configure a T1 or E1 interface with independent clocking enabled and integrated drop and insert on a multiflex trunk voice/WAN interface card.
SUMMARY STEPS
1. enable
2. configure terminal
3. card type {e1 | t1} slot subslot
4. voice-card slot
5. codec complexity { flex [ reservation-fixed { high | medium }] | high | medium }
6. controller {e1 | t1} slot / port
7. framing {sf | esf}
or
framing {crc4 | no-crc4}
8. linecode {ami | b8zs}
or
linecode { ami | hdb3 }
9. clock source {line [primary | bits | independent] | internal [independent] | free-running }
10. ds0-group ds0-group-number timeslots timeslot-list type { e&m-delay-dial | e&m-fgd | e&m-immediate-start | e&m-wink-start | ext-sig | fgd-eana | fxo-ground-start | fxo-loop-start | fxs-ground-start | fxs-loop-start }
or
pri-group [ timeslots range ]
11. voice-port { slot-number / subunit-number / port | slot / port : ds0-group-number }
12. exit
http://www.cisco.com/c/en/us/td/docs/routers/access/interfaces/software/feature/guide/vd-t1e1_vwic3.html?referring_site=RE&pos=1&page=http://www.cisco.com/c/en/us/products/collateral/routers/2800-series-integrated-services-routers-isr/data_sheet_c36-609138.html
