[cisco-voip] what do people mean by "fractional" T1/PRI (supporting PRIs with fewer than 23 possible calls)

[Lelio Fulgenzi]

Thanks again Mike. I'm guessing it's a bit of both. 

There might be significant savings with a fractional PRI though. For example, we want two PRIs for redundancy, and a max of 15 calls at once. If we could reduce each PRI by 8 channels (16 in total) that could be a few bucks. 



--- 
Lelio Fulgenzi, B.A. 
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1 
(519) 824-4120 x56354 (519) 767-1060 FAX (ANNU) 
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
Cooking with unix is easy. You just sed it and forget it. 
- LFJ (with apologies to Mr. Popeil) 


----- Original Message -----
From: "Mike Norton" <mikenorton at pwsd76.ab.ca> 
To: "Lelio Fulgenzi" <lelio at uoguelph.ca>, "Cisco VoIP List" <cisco-voip at puck.nether.net> 
Sent: Thursday, March 21, 2013 3:59:54 PM 
Subject: RE: [cisco-voip] what do people mean by "fractional" T1/PRI (supporting PRIs with fewer than 23 possible calls) 




I think that either (a) it’s highly provider-dependent, or (b) this is one of those ISDN things that Canada does a little differently than elsewhere. Not sure which it is. 



With my Telus PRIs, all channels are available for calls in any direction. The Telus switch simply limits how many simultaneous calls there can be. I didn’t have to do anything special on my end to let the gateway or CUCM know about the limit. 



-- 

Mike Norton 

I.T. Specialist 

Peace Wapiti School Division No. 76 

Helpdesk: 780-831-3080 

Direct: 780-831-3076 







From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Lelio Fulgenzi 
Sent: March-21-13 1:11 PM 
To: Cisco VoIP List 
Subject: [cisco-voip] what do people mean by "fractional" T1/PRI (supporting PRIs with fewer than 23 possible calls) 





We're looking at keeping a couple of PRIs at our remote sites, but lowering the number of actual calls that can actually be made over those PRIs. That's because here, we pay for the data portion and the voice portion separately. 

I'm pretty sure there won't be any special configuration necessary to get this working, since the PRIs will come up (or show) with all 23+1 channels available. 

I'll discuss the options with our provider, e.g. is it cheaper to get a fractional PRI, but I'm worried about the support side of things on the gateway. I've seen references to busying out the channels using the maintenance mode enterprise parameter, but I'm a little weary of that. 

Thoughts? 

Lelio 


--- 
Lelio Fulgenzi, B.A. 
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1 
(519) 824-4120 x56354 (519) 767-1060 FAX (ANNU) 
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
Cooking with unix is easy. You just sed it and forget it. 
- LFJ (with apologies to Mr. Popeil) 

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