Cell Relay Archive

[Debayan Chaudhuri <debayan@rocketmail.com>]

Hello Ashish,

    Thanks for your paper on some of the
issues/trends in narrowband/broadband interworking. I
was mostly interested in the issues regarding
ISUP-BISUP interworking and ISUP-PNNI interworking.
But according to Patrick Hurley's reply ( thanks to
you Patrick !), both options are not feasible in
today's scenario. What we require is basically
ISUP-Q2931(UNI) interworking ( since most carriers
allow only UNI signalling ). Do you feel this is
technically feasible ? Though both are ITU standards,
I haven't seen any interworking specs relating the
two. Trillium's planned interworking products feature
ISUP-PNNI interworking; but there seem to be no plans
for ISUP-Q2931(UNI).

    There is yet another possibility - interworking
between CAS ( for DS1/DS3 links ) and Q2931(UNI). ARe
there any specs on this issue ? Is Trillium or any
other company thinking of providing such a solution ?

Thanks and warm regards,
Debayan Chaudhuri.   





---Ashish Gupta <ashish@trillium.com> wrote:
>
> Hi Debayan,
> 
> I am attaching a paper on our view of some of the
issues and trends of
> the Broadband/Narrowband interworking. The document
is a simple ascii
> text document.
> 
> Trillium provides for some of these solutions and
is in process of
> developing more. You may  be interested in visiting
the Trillium Web
> page at:
http://www.trillium.com/products/interworking/1078134.html
> 
> I hope it helps
> -Ashish
> 
> -----Original Message-----
> From: owner-cell-relay@newstone.ucs.indiana.edu
>
[mailto:owner-cell-relay@newstone.ucs.indiana.edu]On
Behalf Of Debayan
> Chaudhuri
> Sent: Tuesday, December 29, 1998 2:30 PM
> To: cell-relay@cell.ucs.indiana.edu
> Subject: CR: Interworking PSTN and ATM
> 
> 
> Distribution: world
> 
> Hello all,
> 
>    I would really appreciate some pointers on the
> issue of interworking between PSTN and ATM networks.
> If a PSTN call needs to be routed through an ATM
> network ( eg. offloading of data traffic from the
> congested PSTN ), I understand that there needs to be
> interworking between SS7 ( N-ISUP ) and B-ICI (
> B-ISUP ) in order to establish the call. But what if
> if the ATM network does not support B-ICI ? Should we
> try to interwork between SS7 and Q.2931 ( the local
> PSTN switch is treated as an ATM end-point )? Or
> between SS7 and P-NNI ( the local switch is treated
> as an ATM network node ) ?
> 
>     Interworking between N-ISUP and B-ISUP is
> specified in ITU-T Q.2660. But while interworking
> between SS7 and P-NNI ( say ), how do we map physical
> circuit identifiers ( N-ISUP ) with virtual circuit
> identifiers ( ATM ) ? There must be T1/T3 links
> connecting the PSTN switch with the ATM network node.
> 
> Thanks in advance,
> Debayan Chaudhuri.
> 
> 
> 
> 
> 
>
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> 
> ATTACHMENT part 2 application/msword name=aal2.doc


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