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]







in article [EMAIL PROTECTED], "James Gosnold" at
[EMAIL PROTECTED] wrote on 5/27/03 12:00:

> No, you need to buy a hardware ISDN simulator/emulator. And they aren't
> cheap!!




Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=69674&t=69540
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