MCI is the largest carrier, but there are other carriers at the endpoints
for the local fiber distribution. Not user who they are though.
We tried loopbacks from mux1 back to rtr1 ---> no crcs errors.
We tried loopback from mux3 to rtr1 ---> crc errors
We tried loopback from mux1 to rtr2 ---> crc errors
The only common equipment from the loopbacks that produced crc errors are
the Orion CSU/DSU and the MegaT mux.
The MegaT takes 2 unframed T1s and mux them into an E1
We initially had a loose cable on the Orion from mux1, but we still saw crc
after we secured the cable. Next we replaced the Orion with a backup Orion
and everything ran fine initially. After a few hours we started seeing crc
errors.
|<-- 2 T1s -->|<---------------------
True E1 ------------------->|
Unframed
Framed
rtr1 ----- mux1 -- Orion -- MegaT ------ MegaT (in Washington) -----
mux2(passthrough) ------- mux3 --------- rtr2
-----Original Message-----
From: Bart Kurek [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, September 06, 2000 10:47 AM
To: Rossetti, Stan
Subject: Re: calling all telco experts....framed/unframed mode
is it only one carrier? who's your carrier? loopbacks from where to where?
what is the total bandwidth? i'm assuming it's frame because a dedicated t1
or e1 would cost WAY to much for any company to want to pay...
-Bart Kurek
Sales Engineer
Electric Lightwave Inc. (ELIX)
http://www.eli.net
mailto:[EMAIL PROTECTED]
----- Original Message -----
From: "Rossetti, Stan" <[EMAIL PROTECTED]>
To: "'Bart Kurek'" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Tuesday, September 05, 2000 7:07 PM
Subject: RE: calling all telco experts....framed/unframed mode
> We have the same setup on one of our E1s (??). We continue to see CRC
> errors, but we can't seem to locate the problem. Is it clocking? Is a
> problem with the Orion CSU? We have performed tons of loopbacks and
> replaced just above all the equipment but we still see the problems. Is
it
> related to a clocking problem?? It is becoming a big pain in the
??##@$@@$
> Let me know if you have the same problems or can help me with my problems,
> because I am out of ideas.
>
> -----Original Message-----
> From: Bart Kurek [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, September 05, 2000 1:22 PM
> To: Steve DAvies; [EMAIL PROTECTED]
> Subject: Re: calling all telco experts....framed/unframed mode
>
>
> How much bandwidth are you actually looking for? A full E1 of capacity is
> going to be fairly expensive going from the US to the UK. How much actual
> CIR and burst are you looking to get?
>
> -Bart Kurek
> Sales Engineer
> Electric Lightwave Inc. (ELIX)
> http://www.eli.net
> mailto:[EMAIL PROTECTED]
>
>
> ----- Original Message -----
> From: "Steve DAvies" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Tuesday, September 05, 2000 10:36 AM
> Subject: calling all telco experts....framed/unframed mode
>
>
> > Hi,
> >
> > We have a telco in the states who are offering us 2048 (E1) capacity
link
> by
> > muxing 2 T1's, this is being presented to us on V.35 (US end). In the UK
> it
> > is being presented to us on X.21
> >
> > They say this is possible, not being big on telco stuff I can do nothing
> but
> > wait and see.
> >
> > They say that at the UK end the service is framed and at the US end it
is
> > unframed, and they are asking us if we can configure our router(s) to
> > accomodate this.
> >
> > After much searching on the Cisco website we can only find info on
> > configuring G.703/704 interfaces for framed/unframed mode using timeslot
> > command:
> >
> >
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/inter
> _c/icserint.htm#14633
> >
> > So my question is, does anyone know what our telco is upto? Has anyone
> heard
> > of this? Can we configure either our 7200 or 2600 to accomodate this
> > request?
> >
> > Thanks in advance
> >
> > Steve
> >
> > Steve
> >
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