Merit Network
Can't find what you're looking for? Search the Mail Archives.
  About Merit   Services   Network   Resources & Support   Network Research   News   Events   Home

Discussion Communities: Merit Network Email List Archives

North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: Inter-CO signaling?

  • From: Robert E. Seastrom
  • Date: Thu Sep 10 15:18:25 1998

RBS is often run on B8ZS/ESF too.

The reason it is not commonly run on inter-office trunks is because of
a remarkable new innovation called SS7.  Perhaps you have heard of it.

Anyway, since the bits in robbed-bit signaling are "robbed" from the
superframe not from your DS0, it is irrelevant to your throughput.

                                        ---Rob


   From: Chad Skidmore <cskidmor@nwnexus.net>

   RBS is often times run on on AMI D4 circuits.  Also, RBS is generally
   not run on inter-office trunks.

   At least that was the case a few months ago when I worked on a DMS-500.

   ---------------------------------------------
   Chad Skidmore
   Director of Network Engineering
   Northwest Nexus, Inc.
   http://www.nwnexus.com
   1-888-NWNEXUS


   > -----Original Message-----
   > From: Robert E. Seastrom [mailto:rs@bifrost.seastrom.com]
   > Sent: Thursday, September 10, 1998 11:08 AM
   > To: cskidmor@nwnexus.net
   > Cc: goemon@sasami.anime.net
   > Subject: Re: Inter-CO signaling?
   > 
   > 
   > 
   > of course, robbed bit signalling and AMI have nothing to do 
   > with one another...
   > 
   > 
   >    From: Chad Skidmore <cskidmor@nwnexus.net>
   >    Cc: "'nanog@merit.edu'" <nanog@merit.edu>
   >    Date: Thu, 10 Sep 1998 10:47:04 -0700
   >    MIME-Version: 1.0
   >    X-Mailer: Internet Mail Service (5.5.1960.3)
   >    Content-Type: text/plain
   >    Sender: owner-nanog@merit.edu
   > 
   >    Try making an ISDN call from one to the other at a 64k 
   > rate.  If you can
   >    get through then there are at least some trunks setup as 
   > ESF B8ZS clear
   >    channel.  I suspect that they are probably some older 
   > trunks running AMI
   >    D4.
   > 
   >    The other thing you could do is just ask them.
   > 
   >    ---------------------------------------------
   >    Chad Skidmore
   >    Director of Network Engineering
   >    Northwest Nexus, Inc.
   >    http://www.nwnexus.com
   >    1-888-NWNEXUS
   > 
   > 
   >    > -----Original Message-----
   >    > From: Dan Hollis [mailto:goemon@sasami.anime.net]
   >    > Sent: Wednesday, September 09, 1998 5:22 PM
   >    > To: 'nanog@merit.edu'
   >    > Subject: Inter-CO signaling?
   >    > 
   >    > 
   >    > Is there any way to determine if inter-telco links are using 
   >    > robbed bit
   >    > signaling? Eg from GTE to USwest in the Seattle area.
   >    > 
   >    > I suspect RBS may be causing lots of v.90 problems in 
   > GTE country in
   >    > Seattle. But id like to know how to confirm this. And just 
   >    > maybe, get it
   >    > fixed.
   >    > 
   >    > -Dan
   >    > 
   > 
   > 





Discussion Communities


About Merit | Services | Network | Resources & Support | Network Research
News | Events | Contact | Site Map | Merit Network Home


Merit Network, Inc.