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ISDN Backup PRI to BRI

Currently I have a 3 remote sites connected to a main one as a backup to a leased line.I have baught a cisco router 2811 with an ISDN card NM-1CE1T1_PRI. the 3 remote sites are connected to the main one at 128k and ,i would like to upgrade them to 256k for each site. I have ordered an extra ISDN line. I need to know how i am going to reconfigure the link to take 256k for each site using PRI to BRI connection. I have attached the current 3 config for the remote sites and the current config for the main site

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Re: ISDN Backup PRI to BRI

Using dialer profiles would be a solution.Logical interfaces which merges the physical as a single interface would utilize full bandwidth.Refer the following URL for more information

http://www.cisco.com/en/US/tech/tk801/tk133/tk159/tsd_technology_support_sub-protocol_home.html

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