I've got an 8 port BRI ISDN module on a 3640. 4 BRI ISDN interfaces are sharing the same telephone number. Is it possible to support multiple simultaneous dial-up connections with callback and how is it done? Do I need multiple dialer interfaces and pools
The telco has configured 4 S/T BRI interfaces into the same group under a single number. all of the isdn interfaces have the following config:
no ip address
dialer pool-member 1
isdn sw basic-net3
isdn incoming-voice modem (for digital modems)
ppp auth chap pap callin
the dialer interface
ip unnum eth 0/0
no ip split-hor
dialer pool 1
dialer idle-time 0
peer default ip address pool D...
no cdp ena
ppp callback accept
ppp auth pap chap callin
the first call placed is dialed back and connects okay (full ip connectivity)
the second incoming call is called back and connects (full ip connectivity) but the first call loses ip connectivity. the call is still connected, and the ip address is still in the Router. but connectivity is dead, apart from the extremely rare returned ping packet. are there any glaring omissions in this config or is it the telco's problem, their end?
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