RE: Strange ISDN Problem

["Mark Tinka" <mtinka at africaonline.co.ug>]

Okay, so AS5300.

Confirm your AS5300 at the remote end has the following on the D-Channel:

interface Serial0:15
 no ip address
 encapsulation ppp
 dialer rotary-group 1
 dialer-group 1
 isdn switch-type primary-net5
 isdn incoming-voice modem
 no fair-queue
 no cdp enable

You don't say to which country you are dialing, so I will assume E-1, whose
D-Channel is positioned at timeslot 15. If you are using T-1, it's slightly
different, but nothing too much to hurt your setup requirements. The "isdn
incoming-voice modem" tells the on-board MICA modems to treat the call as a
data call.

Then, also check to see you have something close to the following
configuration:

interface Dialer1
 ip unnumbered FastEthernet0
 encapsulation ppp
 dialer in-band
 dialer idle-timeout 0
 dialer-group 1
 peer default ip address pool your-pool-defined-here
 no fair-queue
 no cdp enable
 ppp authentication pap callin
 ppp multilink
!
dialer-list 1 protocol ip permit

That portion should take care of your ISDN connection request. I don't
expect certain parts of this configuration to be exactly the same as yours,
because of your environment, but this should give you some kind of idea on
how to get it working, from a server perspective. Hope it helps.

I can't really say I have heard of a successful [satellite] international
ISDN-BRI call before; that would be interesting. Is your telco providing
international access via satellite? Has this scenario ever worked for you
before?

Regards,

Mark Tinka - CCNA
Network Engineer, Africa Online Uganda 

-----Original Message-----
From: George Murage [mailto:georgemurage at yahoo.com] 
Sent: Thursday, June 19, 2003 4:47 PM
To: mtinka at africaonline.co.ug
Cc: afnog at afnog.org
Subject: RE: Strange ISDN Problem


Sorry about the sketchy details.

It is as shown below

Cisco1751---NT1----ISDN network-----CiscoAS5300
        (BRI)                        (PRI)    

So my router is the Cisco1751.So when i initiate a
data call from the cisco1751 (isdn call int bri0/0
xxxxxxxxxxx) the call is detected as an incomming
voice/speech call by the Cisco AS5300. Then when the
Cisco AS5300 tries to make a data call to me, it is
detected as an incomming speech/voice call.

I suspect one of the telco switches is dropping some
of the bearer information when switching the call, or
is setup to route all international isdn calls as
voice calls and hence does bother to check the bearer capability requested.

Let me know what you think.

Thanks and regards
George Murage



--- Mark Tinka <mtinka at africaonline.co.ug> wrote:
> You don't say what remote access server the call is originating
> from/terminating to on either side of the
> connection? Cisco access server,
> Lucent, Patton, 3Com e.t.c
> 
> Which one?
> 
> Regards,
> 
> Mark Tinka - CCNA
> Network Engineer, Africa Online Uganda
> 
> -----Original Message-----
> From: owner-afnog at afnog.org
> [mailto:owner-afnog at afnog.org] On Behalf Of
> George Murage
> Sent: Thursday, June 19, 2003 9:47 AM
> To: afnog at afnog.org
> Subject: Strange ISDN Problem
> 
> 
> Dear All,
> 
> I have a strange isdn problem that is just puzzling.
> 
> I am tring to initiate an international isdn data
> call. My main problem is the call is received at the
> remote end as a voice call and not a data call, and
> hence ignored by the access server. The same happens
> when the remote end initiates the call. The debugs
> show that it is originated as a data call(at the
> remote end) but at my end my router detects it as an incomming voice 
> call and hence ignores it.
> 
> Anybody come across this kind of problem?
> 
> Kind Regards
> George Murage
> 
> 
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