Hi JE,

Please excuse me if I am on the wrong track here, but if you are looking for a Gateway that supports E1 here is some info. The 2800 Series ISR (2811,2821 etc.) support the VWIC E1 Interface.

VWIC Support -- The multiflex VWIC cards are supported on Cisco 2600XM series, Cisco 2691, **Cisco 2800 series, Cisco 3700 series, and Cisco 3800 series routers when installed on the network modules listed in Components Used . The multiflex VWIC cards can also be installed in any VIC slot on the router.

From this good doc;

http://www.cisco.com/en/US/products/hw/modules/ps2617/products_configuration_example09186a008052c920.shtml#Components

Hope this helps!

Rob