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Home > Archive > Voice over IP Cisco > December 2006 > 2851 and 12 T1s
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| STEVEN CASPER 2006-12-01, 7:11 am |
| What do you do if you have multiple potential clocking sources? It is
likely at a site that you can have connections to Local and Long
Distance service providers as well as to a PBX.
Steve
[vbcol=seagreen]
Biggest problem is going to be that the 2851 can only have one clocking
source. So if all 12 terminate to the same CO switch you are fine
otherwise you will have timeing issues.
Craig
"Wydra, Jason" <jason.wydra@berbee.com>
Sent by: cisco-voip-bounces@puck.nether.net
11/30/2006 01:22 PM
To
<cisco-voip@puck.nether.net>
cc
Subject
[cisco-voip] 2851 and 12 T1s
Any issue with terminating 12 T1s into a 2851? I have a mixture of PRI
and
T1 CAS. 6 2MFT-T1 cards. Does this router have the horsepower?
Jason Wydra
Berbee
Cisco Voice Engineer
8725 West Higgins Road, Suite 700
Chicago, Il. 60631
IP phone 773.867.6084
Cell 630-209-9792
Jason.Wydra@berbee.com
www.berbee.com
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
| |
| Lelio Fulgenzi 2006-12-01, 1:11 pm |
| Do the 3800s have this problem?
--------------------------------------------------------------------------------
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * university of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
"I can eat fifty eggs." "Nobody can eat fifty eggs."
----- Original Message -----
From: STEVEN CASPER
To: jason.wydra@berbee.com ; cisco-voip@puck.nether.net ; cmstaffin@ra.rockwell.com
Sent: Friday, December 01, 2006 7:18 AM
Subject: Re: [cisco-voip] 2851 and 12 T1s
What do you do if you have multiple potential clocking sources? It is
likely at a site that you can have connections to Local and Long
Distance service providers as well as to a PBX.
Steve
[vbcol=seagreen]
Biggest problem is going to be that the 2851 can only have one clocking
source. So if all 12 terminate to the same CO switch you are fine
otherwise you will have timeing issues.
Craig
"Wydra, Jason" <jason.wydra@berbee.com>
Sent by: cisco-voip-bounces@puck.nether.net
11/30/2006 01:22 PM
To
<cisco-voip@puck.nether.net>
cc
Subject
[cisco-voip] 2851 and 12 T1s
Any issue with terminating 12 T1s into a 2851? I have a mixture of PRI
and
T1 CAS. 6 2MFT-T1 cards. Does this router have the horsepower?
Jason Wydra
Berbee
Cisco Voice Engineer
8725 West Higgins Road, Suite 700
Chicago, Il. 60631
IP phone 773.867.6084
Cell 630-209-9792
Jason.Wydra@berbee.com
www.berbee.com
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
| |
| Jonathan Charles 2006-12-01, 1:11 pm |
| The only time you will get a clocking source problem is if you have multiple
T1s connecting to a router from different destination switches.
For example, you have a frame-relay T1 and a PRI...
You have to identify to the router which WIC is going to be the master
clock. In which case you will see slips on the other T1.
I do not believe there is any work-around. It is possible (though unlikely)
that there are some cisco routers that can have multiple clock sources...
Jonathan
On 12/1/06, Lelio Fulgenzi <lelio@uoguelph.ca> wrote:
>
> Do the 3800s have this problem?
>
>
> --------------------------------------------------------------------------------
> Lelio Fulgenzi, B.A.
> Senior Analyst (CCS) * university of Guelph * Guelph, Ontario N1G 2W1
> (519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> "I can eat fifty eggs." "Nobody can eat fifty eggs."
>
> ----- Original Message -----
> *From:* STEVEN CASPER <SCASPER@mandtbank.com>
> *To:* jason.wydra@berbee.com ; cisco-voip@puck.nether.net ;
> cmstaffin@ra.rockwell.com
> *Sent:* Friday, December 01, 2006 7:18 AM
> *Subject:* Re: [cisco-voip] 2851 and 12 T1s
>
> What do you do if you have multiple potential clocking sources? It is
> likely at a site that you can have connections to Local and Long
> Distance service providers as well as to a PBX.
>
> Steve
>
> Biggest problem is going to be that the 2851 can only have one clocking
>
> source. So if all 12 terminate to the same CO switch you are fine
> otherwise you will have timeing issues.
>
> Craig
>
>
>
>
> "Wydra, Jason" <jason.wydra@berbee.com>
> Sent by: cisco-voip-bounces@puck.nether.net
> 11/30/2006 01:22 PM
>
> To
> <cisco-voip@puck.nether.net>
> cc
>
> Subject
> [cisco-voip] 2851 and 12 T1s
>
>
>
>
>
>
> Any issue with terminating 12 T1s into a 2851? I have a mixture of PRI
> and
> T1 CAS. 6 2MFT-T1 cards. Does this router have the horsepower?
>
> Jason Wydra
> Berbee
> cisco Voice Engineer
> 8725 West Higgins Road, Suite 700
> Chicago, Il. 60631
> IP phone 773.867.6084
> Cell 630-209-9792
> Jason.Wydra@berbee.com
> www.berbee.com
>
>
> ________________________________________
_______
> cisco-voip mailing list
> cisco-voip@puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
>
> ________________________________________
_______
> cisco-voip mailing list
> cisco-voip@puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
>
> ________________________________________
_______
> cisco-voip mailing list
> cisco-voip@puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
>
>
| |
| Pickett, McLean (OCTO) 2006-12-01, 1:11 pm |
|
The VWIC2's support different clocking sources for data T1's, but not voice
T1's. Seems like the problem would be more related to PRI's on the same
router from different CO switches. Has anyone seen this in practice?
McLean
_____
From: cisco-voip-bounces@puck.nether.net
[mailto:cisco-voip-bounces@puck.nether.net] On Behalf Of Jonathan Charles
Sent: Friday, December 01, 2006 9:55 AM
To: Lelio Fulgenzi
Cc: cisco-voip@puck.nether.net; STEVEN CASPER
Subject: Re: [cisco-voip] 2851 and 12 T1s
The only time you will get a clocking source problem is if you have multiple
T1s connecting to a router from different destination switches.
For example, you have a frame-relay T1 and a PRI...
You have to identify to the router which WIC is going to be the master
clock. In which case you will see slips on the other T1.
I do not believe there is any work-around. It is possible (though unlikely)
that there are some cisco routers that can have multiple clock sources...
Jonathan
On 12/1/06, Lelio Fulgenzi <lelio@uoguelph.ca <mailto:lelio@uoguelph.ca> >
wrote:
Do the 3800s have this problem?
----------------------------------------------------------------------------
----
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * university of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
"I can eat fifty eggs." "Nobody can eat fifty eggs."
----- Original Message -----
From: STEVEN CASPER <mailto:SCASPER@mandtbank.com>
To: jason.wydra@berbee.com <mailto:jason.wydra@berbee.com> ;
cisco-voip@puck.nether.net <mailto:cisco-voip@puck.nether.net> ;
cmstaffin@ra.rockwell.com <mailto:cmstaffin@ra.rockwell.com>
Sent: Friday, December 01, 2006 7:18 AM
Subject: Re: [cisco-voip] 2851 and 12 T1s
What do you do if you have multiple potential clocking sources? It is
likely at a site that you can have connections to Local and Long
Distance service providers as well as to a PBX.
Steve
[vbcol=seagreen]
<mailto:cmstaffin@ra.rockwell.com> > 11/30/06 2:43 PM >>>
Biggest problem is going to be that the 2851 can only have one clocking
source. So if all 12 terminate to the same CO switch you are fine
otherwise you will have timeing issues.
Craig
"Wydra, Jason" <jason.wydra@berbee.com <mailto:jason.wydra@berbee.com> >
Sent by: cisco-voip-bounces@puck.nether.net
<mailto:cisco-voip-bounces@puck.nether.net>
11/30/2006 01:22 PM
To
<cisco-voip@puck.nether.net <mailto:cisco-voip@puck.nether.net> >
cc
Subject
[cisco-voip] 2851 and 12 T1s
Any issue with terminating 12 T1s into a 2851? I have a mixture of PRI
and
T1 CAS. 6 2MFT-T1 cards. Does this router have the horsepower?
Jason Wydra
Berbee
Cisco Voice Engineer
8725 West Higgins Road, Suite 700
Chicago, Il. 60631
IP phone 773.867.6084
Cell 630-209-9792
Jason.Wydra@berbee.com <mailto:Jason.Wydra@berbee.com>
www.berbee.com <http://www.berbee.com>
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net <mailto:cisco-voip@puck.nether.net>
https://puck.nether.net/mailman/listinfo/cisco-voip
<https://puck.nether.net/mailman/listinfo/cisco-voip>
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net <mailto:cisco-voip@puck.nether.net>
https://puck.nether.net/mailman/listinfo/cisco-voip
<https://puck.nether.net/mailman/listinfo/cisco-voip>
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net <mailto:cisco-voip@puck.nether.net>
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| |
| Jason Aarons \(US\) 2006-12-01, 1:11 pm |
| It's a known issue, listed in the product data sheet for the
VIC2-2MFT-T1. For voice only, you have to plan the clocking around the
motherboard design limitations. Not sure how in the future cisco could
get the DSPs on motherboard to have different clock sources. Maybe Texas
Instruments needs some re-work in their chips to support this.
________________________________
From: cisco-voip-bounces@puck.nether.net
[mailto:cisco-voip-bounces@puck.nether.net] On Behalf Of Pickett, McLean
(OCTO)
Sent: Friday, December 01, 2006 10:20 AM
To: Jonathan Charles; Lelio Fulgenzi
Cc: cisco-voip@puck.nether.net; STEVEN CASPER
Subject: Re: [cisco-voip]2851 and 12 T1s
The VWIC2's support different clocking sources for data T1's, but not
voice T1's. Seems like the problem would be more related to PRI's on the
same router fromdifferent CO switches. Has anyone seen this in
practice?
McLean
________________________________
From: cisco-voip-bounces@puck.nether.net
[mailto:cisco-voip-bounces@puck.nether.net] On Behalf Of Jonathan
Charles
Sent: Friday, December 01, 2006 9:55 AM
To: Lelio Fulgenzi
Cc: cisco-voip@puck.nether.net; STEVEN CASPER
Subject: Re: [cisco-voip] 2851 and 12 T1s
The only time you will get a clocking source problem is if you have
multiple T1s connecting to a router from different destination switches.
For example, you have a frame-relay T1 and a PRI...
You have to identify to the router which WIC is going to be the master
clock. In which case you will see slips on the other T1.
I do not believe there is any work-around. It is possible (though
unlikely) that there are some cisco routers that can have multiple clock
sources...
Jonathan
On 12/1/06, Lelio Fulgenzi <lelio@uoguelph.ca> wrote:
Do the 3800s have this problem?
------------------------------------------------------------------------
--------
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * university of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
"I can eat fifty eggs." "Nobody can eat fifty eggs."
----- Original Message -----
From: STEVEN CASPER <mailto:SCASPER@mandtbank.com>
To: jason.wydra@berbee.com ; cisco-voip@puck.nether.net ;
cmstaffin@ra.rockwell.com
Sent: Friday, December 01, 2006 7:18 AM
Subject: Re: [cisco-voip] 2851 and 12 T1s
What do you do if you have multiple potential clocking sources?
Itis
likely at a site that you can have connections to Local and Long
Distance service providers as well as to a PBX.
Steve
>>> "Craig M Staffin" <cmstaffin@ra.rockwell.com> 11/30/06 2:43
PM >>>
Biggest problem is going to be that the 2851 can only have one
clocking
source. So if all 12 terminate to the same CO switch you are
fine
otherwise you will have timeing issues.
Craig
"Wydra, Jason" <jason.wydra@berbee.com>
Sent by: cisco-voip-bounces@puck.nether.net
11/30/2006 01:22 PM
To
<cisco-voip@puck.nether.net>
cc
Subject
[cisco-voip] 2851 and 12 T1s
Any issue withterminating 12 T1s into a 2851? I have a mixture
of PRI
and
T1 CAS. 6 2MFT-T1 cards. Does this router have the horsepower?
Jason Wydra
Berbee
Cisco Voice Engineer
8725 West Higgins Road, Suite 700
Chicago, Il. 60631
IP phone 773.867.6084
Cell 630-209-9792
Jason.Wydra@berbee.com
www.berbee.com
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
_______________________________________
________
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
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