From: miken (miken@sisna.com)
Date: Thu Nov 21 2002 - 18:24:39 GMT-3
Leo,
To use one dialer string to bring up both channels, the telco must setup a
rollover from the first b channel to the second b channel. The telco switch
will receive a second call setup to the same number and need to rollover to
that second channel. I think that it is totally dependant on the telco side
to get this to work correctly. Bridging would be an example of this. If they
can't do it, and I have seen this in more rural areas using legacy
equipment, then you will probably have to use two dialer strings.
HTH,
Mike
----- Original Message -----
From: "Leo Song" <lsong@dataphile.ca>
To: "'Karl Brusen'" <karl@brusen.com>; "'ccielab'" <ccielab@groupstudy.com>
Sent: Thursday, November 21, 2002 1:03 PM
Subject: RE: ISDN: One or Two Dial Strings
> When your calling router try to bring up the second channel, in case
> there is one dial string only, so the calling router would call the same
> number again.
>
> 1. the remote ISDN switch detect the incoming call address the same
> number / channel while the channel is already connected, so it would
> response you with BUSY.
> If you calling router configure another dialing string, then your
> calling router would give it a try, so in that case, say the Telco ISDN
> switch doesn't support / configure hunt-group function, then you have to
> configure two dial strings / numbers.
>
> 2. the remote ISDN switch detect the same info as 1, while it was
> configured with hunt-group so it would automatically shift to the second
> number / channel, in that case, you only need to configure one number /
> string.
>
> Correct me if I was wrong.
>
> Leo
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Karl Brusen
> Sent: Thursday, November 21, 2002 12:42 PM
> To: ccielab
> Subject: ISDN: One or Two Dial Strings
>
> Can anyone tell me when to list the dial strings for both BRI channels
> and
> when to list just one (dial string of map statements)? I have seen it
> done
> both ways. I apologize if this issue has been discussed previously.
> Couldn't find an answer in the archives.
>
> Thanks,
>
> Karl Brusen
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