E1 Modules for Cisco1921

Question:

I was searching for C2951-VSEC an E1 card on Cisco1921, however I couldn't find out an exact replacment for HWIC-4T1/E1.

The modules which I came across are, VWIC2-1MFT-T1/E1  and   VWIC2-1MFT-G703

Can anyone please let me know the differences between these two cards VWIC cards ?

Which one should I purchase?

Answer:

Actually, 1921 supports HWIC-4T1/E1.

http://www.cisco.com/en/US/prod/collateral/routers/ps10538/aag_c07_563807.pdf

The WIC G703 supports unframed E1, that is usually not necessary.

For futher information, please refer to  http://www.3anetwork.com/cisco-c2921-vsec/k9-price_p251.html