this is from an earlier post on the list. Hope it helps. -Nakul
Try this: ( if it works, credit given to author below ) Scotty ==================================================== Enter this under stupid router tricks (it's got to be more expensive than an ISDN emulator, but not if you've got the parts lying around). Switch: Cisco 2600 or 3600 with NM-2V and VIC-2BRI-S/T-TE (NT should work too), IOS 12.1.5T9 R1, R2: Cisco with ISDN BRI S/T interface. IOS 12.x R1----S/T crossover cable----Switch----S/T crossover----R2 These configs let you do ISDN BRI dialup between two routers, using a third router as an ISDN switch. Call setup is flakey but otherwise it seems to work once the call is up. Switch config, for ISDN dial (and X.25 over ISDN D-channel thrown in too) ! isdn switch-type basic-net3 x25 routing ! interface Loopback0 ip address 10.0.0.1 255.255.255.255 ! whatever ! interface BRI1/0 description to R1 no ip address isdn switch-type basic-net3 isdn overlap-receiving isdn protocol-emulate network isdn layer1-emulate network isdn incoming-voice voice isdn x25 dchannel isdn skipsend-idverify ! ! Basic X.25 over D channel, so you can run pad commands ! For always on, see the Cisco docs ! interface BRI1/0:0 no ip address ip mtu 1514 no ip mroute-cache x25 address 5552000 clns mtu 1514 ! interface BRI1/1 description to R2 no ip address isdn switch-type basic-net3 isdn protocol-emulate network isdn layer1-emulate network isdn incoming-voice voice isdn skipsend-idverify ! interface BRI1/1:0 no ip address ip mtu 1514 no ip mroute-cache x25 address 5551000 clns mtu 1514 ! x25 route 5551111 interface BRI1/1:0 x25 route 5552222 interface BRI1/0:0 ! voice-port 1/0/0 ! voice-port 1/0/1 ! dial-peer voice 1 pots incoming called-number 6045551111 destination-pattern 6045552222 direct-inward-dial port 1/0/0 ! dial-peer voice 2 pots incoming called-number 6045552222 destination-pattern 6045551111 direct-inward-dial port 1/0/1 ! dial-peer voice 10 voip destination-pattern 6045552222 session target ipv4:10.0.0.1 codec clear-channel ! dial-peer voice 20 voip destination-pattern 6045551111 session target ipv4:10.0.0.1 codec clear-channel ! R1, R2 config (just reverse the 5551111/5552222 and 1.1.1.1/1.1.1.2) ! isdn switch-type basic-net3 ! interface BRI0/0 ip address 1.1.1.1 255.255.255.0 encapsulation ppp dialer string 6045552222 class DOV dialer-group 1 isdn switch-type basic-net3 isdn incoming-voice data isdn calling-number 6045551111 isdn x25 dchannel ! interface BRI0/0:0 no ip address ip mtu 1514 no ip mroute-cache x25 address 5551111 ! map-class dialer DOV dialer voice-call dialer-list 1 protocol ip permit ! -- John Paul Morrison CCNP/Security, CCDP [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] > Nakul, > > Would you please explain more (using 3 routers to create ISDN).......... > > Andre' > > -----Original Message----- > From: Nakul Malik [mailto:[EMAIL PROTECTED] > Sent: Sunday, July 13, 2003 8:50 PM > To: [EMAIL PROTECTED] > Subject: Re: ISDN ... connectivity [7:72051] > > > nope. > not possible > however > with three routers u can > -Nakul > > ""H T"" wrote in message > news:[EMAIL PROTECTED] > > Hi, > > Can we connect 2 ISDN ports back to back for test ? (with out ISDN > > simulation device) Is there any kind cable to do this job? > > > > > > > > cheers > > Heiman. > For more information about Barclays Capital, please > visit our web site at http://www.barcap.com. > > > Internet communications are not secure and therefore the Barclays > Group does not accept legal responsibility for the contents of this > message. Although the Barclays Group operates anti-virus programmes, > it does not accept responsibility for any damage whatsoever that is > caused by viruses being passed. Any views or opinions presented are > solely those of the author and do not necessarily represent those of the > Barclays Group. Replies to this email may be monitored by the Barclays > Group for operational or business reasons. > > ------------------------------------------------------------------------ Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=72315&t=72051 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
