[c-nsp] ATM-DXI on E1

[Jon Dustin]

>>> "Vincent De Keyzer" <vincent at dekeyzer.net> wrote on 3/18/2005
7:26:39 AM:
> thanks a lot for this insight.
> 
>  
> 
> I understand that you are delivering a PRI over this link, which is
one 
> of
> the things we would like to do. How about clocking? Can you configure

> both
> line and internal clocking on the RAD box? Never had any slips? Are
you
> happily sending faxes over your link?
> 

I am sure faxes are going across that line, as there are several
offices in the remote building.

>  
> 
> I imagine that the IP network must be just perfect to deliver this -
way
> better than what you need to deliver VoIP services. 
> 
> 

The IP network we use for these links is *very simple*:

RAD BOX 
   |
cat3548
   |
media converter (100TX/FX single-mode)
   |
media converter (100TX/FX single-mode)
   |
cat2950
   |
RAD BOX

The units are on the same VLAN (private address, no need for routing),
and do not share that VLAN with any "normal" machines that may
compromise their bandwidth needs. Obviously this may not be possible in
another network, and is likely a "best-case" scenario. However, the
units do allow for some clock slippage with internal buffers.
Unfortunately the documentation leaves a bit to be desired in DESCRIBING
the buffers, and when they are used.

>  
> 
>> From: "Vincent De Keyzer" <
> <https://puck.nether.net/mailman/listinfo/cisco-nsp> vincent at
> dekeyzer.net>
>> Subject: RE: [c-nsp] ATM-DXI on E1
>> To: < <https://puck.nether.net/mailman/listinfo/cisco-nsp> cisco-nsp
at
> puck.nether.net>
>> Message-ID:
> < <https://puck.nether.net/mailman/listinfo/cisco-nsp>
> 20050317165434.20AD85B4AE at quattrostagioni.mactelecom.net>
>> Content-Type: text/plain;    charset="iso-8859-1"
>> 
>> Hi,
>> 
>> does anybody have experience with those Rad's "TDM over IP" boxes
on
> a 
>> Cisco
>> network?
>  
> Yep - I have TWO PAIRS of them (IPMux-1) The management is not
terribly
> bright, but they do the T1 job quite adequately. In our configuration
we
> have a 100FX link between two buildings, each pair of IPMUX-1 units
> transmits/receives ~ 2Mb/sec continually, and presents a
clear-channel
> T1 interface to a Nortel PBX (and remote shelf).
>  
> No troubles so far (5 months deployed) - The units can be
power-cycled
> and will auto-establish the connection. As they use IP for the
> transport, there is nothing bizzare to configure. Give each an IP
> address, point them to their partner, configure the T1 parameters,
and
> go.


=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Jon Dustin - Network Specialist
University of Southern Maine
Portland, ME