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Community Member

isdn backup

center use one ISDN line as backup for two remote spke router

we persue a solution: when isdn is used as backup line for one spoke at multilink speed 128k, another router at the same time want to use the backup line too. So is there a way to let the first router free one B channel for the other router?

center router

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isdn network

/ \

router1 router2

3 REPLIES
Cisco Employee

Re: isdn backup

YES..pl. use the dialer profile with "dialer max-link 1" command to restrict the incoming connection for one link only so that you have one channel each reserved for each spoke router..Here is the url for more

http://www.cisco.com/warp/public/131/dialer-max-link.html

Configuring back with dialer profiles

http://www.cisco.com/warp/public/793/access_dial/ddr_dialer_profile.html

Community Member

Re: isdn backup

but I want to use two channels for backup one spoke

and want to release one channel for another spoke when needed

Cisco Employee

Re: isdn backup

You need to explain in clear detail about when and on what situation you want to free a b-channel..But there is a command "dialer fast-idle" which will disconnect the connection on a b-channel when the line becomes idle for configured length of time, the current call is disconnected immediately and the new call is placed.here is the link that explain more

http://www.cisco.com/univercd/cc/td/doc/product/software/ios11/rbook/rddr.htm#xtocid1536812

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