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New Member

ISDN PRI on E1

I have configured my E1 controller for PRI. The line is up. But i am unable to open the interface to configure it. When i am issuing the command interface serial2/0:1 the following error is displyed

% cannot access B-channel interfaces.

The configuration for PRI as has been done is :(global configuration)

isdn switch-type primary-net5

and

the controller configuration are as follows:

controller E1 2/0

framing NO-CRC4

pri-group timeslots 1-31

description *** PRI 22839972 ***

Kindly help me about where is the problem.

6 REPLIES
Bronze

Re: ISDN PRI on E1

Hi, try issuing the command interface serial2/0:15 and go from there.

Channel 15 is the D channel here.

Hope this helps.

New Member

Re: ISDN PRI on E1

Hi,

For a ISDN PRI, you can only configure the D-channel; that is S2/0:15.

eg.

interface Serial2/0:15

description "isdn pri no. is 1234567"

no ip address

encapsulation ppp

dialer pool-member 1

isdn switch-type primary-net5

no cdp enable

ppp authentication chap

ppp multilink

Use Dialer pool-member in above D-channel configuration if you want to configure dialer profiles as per your needs. Then do remember to add "dialer pool 1" in all the dialer profiles.

Pls do rate all helpful posts.

New Member

Re: ISDN PRI on E1

Hi

I have configured the s2/0:15 interface

But still when I try to configure the s2/0:1 its giving the same error

% cannot access B-channel interfaces

New Member

Re: ISDN PRI on E1

Hi,

You will be not able to configure B channels. As per my understanding you want to configure seperate interfaces for individual location.

You can create dialer & make it the pool member of PRI D Interface i.e. s2:15.

I think this will solve your problem.

Do let me know if you still have any query.

Madhur

New Member

Re: ISDN PRI on E1

Hi Madhur

Yes I want to configure for multiple locations do i need to create dialer pool on the PRI D Interface i.e.s2:15?

Re: ISDN PRI on E1

Hi

If you are configuring different profiles for different locations then you need to create induvidual dialers which should be brought into the dialer pool configured under the dialer interfaces and respective dialer pool-member configured under the PRI Interface (S 2:15)..

you can refer this link for the same which deals with configuring a T1 PR1 link..

http://www.cisco.com/en/US/tech/tk801/tk133/technologies_configuration_example09186a0080094559.shtml

regds

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