Stuck on how to configure my E1 Card.

[paulk29]

All,
I've got a 3640 with a 12 modem Mica Card and an E1 Card. I want to set up a RAS solution over this E1 but also have a 512K Internet connection to my ISP. My problem is how to configure the E1 ( Controller and Serial ) correctly to do this. The Mica Card sits in slot 2 and has line numbers from 65 to 77 while the E1 Card sits in Slot 1.
Has anyone any suggestions?
It would be greatly appreciated.
Slán
Paul

Paul Kilcoyne B eng. CCNA

 

[routerman]

Is the ISP connection over this E1 already?

 

[paulk29]

No not yet but that is my intension. Is it possible?
Thanks
Paul

Paul Kilcoyne B eng. CCNA

 

[routerman]

Its possible to use a fractional E1 link, where a group of 64k timeslots are allocated to your ISP and another group is allocated to another remote site. This has to be set up with your E1 provider, and is also hardware dependant I seem to recall.

A typical example is where you have 4 remote sites hanging off a core router, core has E1, each remote can have say 256k each. Your circuit provider splits the E1 into 4 seperate circuits to the branch offices.

It may be easier to get a new circuit, presented as X21 and use another serial interface on the router.

 

[paulk29]

Routerman,
thanks for the reply. What I'd like to do is have 512K for Internet connection and then the remaining Bandwidth for RAS not remote Offices, so that mobile users could dial into the Network via a Modem on their say Laptop and connect in via the E1 and then terminate on the Mica Modems. My problem is how to configure the E1 Card for both internet access and RAS dial in from a Cisco point of view. I hope I'm being clear here.
Thanks again
Paul

Paul Kilcoyne B eng. CCNA

 

[routerman]

Paul,

I dont see any easy way of doing this, your ISP would have to accept the RAS call then somehow route that call over the E1 circuit. The other issue is that the E1 card you currently have has no support for the ISDN signalling channel. I'm sure its not possible.

The way this would normally be done is have an ISDN (either basic or primary rate) fitted in the router. Then when the call from the user is accepted on this interface a call that originated from a modem is switched on to one of the Mica modems.

However these days I'd look at a VPN based solution to provide this type of access, have you considered this approach?