Diference in A/S E1 Interface and Serial Interface

[fkseow]

For Router 3600/3700;

What is the difference between E1 and Serial interfaces ?

I thought both also meant for leased line connection ?

Please help to clarify.

TQ

[gmarogi]

I think the E1 interface is channelized where you can split into multiple channels which is not possible on a serial interface. Check if this doc helps you :

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis2600/hw_inst/nm_inst/nm-doc/ovrnetm.htm