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RE: Strange ISDN Problem
Hi Mark,
Thanks for your response. I will try what you have
suggested and let you know how it goes.
However, this is more of a work-around. You see my
call should be connected as a digital 64Kbps
connection to the PRI/E1. With what you have suggested
the call is connected as an analogue 64kbps
connection. This is similar to what happens when a
dial-in user using an analogue line calls the AS5300
via an ISDN PRI.(am i right?)
So the problem still persists that my telco cannot
switch the call with the correct bearer capability.
Nonetheless, it may not matter now as my call still
gets connected. Question is what i do loose if i swap
the remote BRI with a V.90 modem and an analogue line?
(well save for the reduction in speed from 64kbps to a
max of 56Kbps)
The international ISDN BRI/PRI service is being
provided via Satellite. Voice calls work like a charm
:), now if only i can get this data calls working...
Thanks and regards
George Murage
--- Mark Tinka <mtinka at africaonline.co.ug> wrote:
> 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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