06-11-2002 09:55 AM - edited 03-01-2019 10:07 PM
Hi Folks,
I have a cisco 3620 with a PRI interface (E1) and 30DM. I can configure the router to dialout to an ISP using one of the asynchronous modems in the pool.
I was wondering if it is possible to use a BChannel to make this call purely digital and instantaneous.
Whenever I do a show interface, I see the B Channels which come up as S0/x
I can obviously configure the D Channel but when I try to access a "B Channel", the router tells me "B-Channel not accessible or something like that" (sorry I forgot the exact term ... it's been two weeks).
Is it possible to grab a couple of B Channels and use them in a dialpool, and all that other related good stuff. I would love it if we could do this. Unfortunately, I don't have space to put Physical BRI' Interfaces on the router anymore, so if there is a way to plug into some of those B Channels, I would be very glad if you could show me your expertees.
Thanks for all your help and insight
Manish Hira
CCNA
06-11-2002 10:53 AM
interface serial0:23
dialer pool-member 1 max-link 2
encap ppp
ppp multilink
interface Dialer0
ip address x.x.x.x 255.255.255.0 ( or ip add negotiated)
encapsulation ppp
no ip route-cache
no ip mroute-cache
dialer pool 1
dialer remote-name abcd (if you know)
dialer string xxxx
dialer-group 1
no cdp enable
ppp authentication chap
ppp chap hostname xyz (login name provided by ISP)
ppp chap password xxx
ppp multilink
This gives you the option of using the B channels...the other end needs to be an ISDN interface to work.
Thanks, Makarand.
06-11-2002 09:00 PM
Makarand,
Thanks for the config info. I see what I need to do. My mistake was that I was trying to enter a specific group of B-Channels to make them part of a dialpool.
I never knew thought of trying to enter the dialpool command for the D Channel.
Thanks once again.
I will let you guys know when I successfully do this within the next few days.
Manish
06-11-2002 10:55 AM
All the b-channels will inherit the config from the D-channel..So configuring D-channel (interface serial x:23) is a way to configure the group of b-chans.
Now you can dedicate one of the PRI line (all the b chans) to be used when you try to dialout but you can't dedicate only certain b channels for that.
Visit the following url for that
http://www.cisco.com/warp/public/471/modemdialoutcontroller.html
You can use dialer profiles to dialout on the pri line but the b chans will be picked by the router in a random manner..
06-11-2002 08:56 PM
Hi Tejal,
Thanks for your help on this. I will definitely try and see if I can do this within the next 5 days.
Manish
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