[cisco-voip] SIP vs PRI PSTN

[keli at carocomp.ro]

Although I must admit I probably don't understand this question (SIP  
for PSTN? Isn't that a contradiction in terms? :P ) my two cents (if  
we're talking about SIP as in VoIP protocol):

You're free from quite a lot of expensive hardware (no gateway, no  
E1/T1 card, no DSPs) and also, even a *lot* of bandwidth can be  
cheaper that the monthly rates of an E1 PRI (well, at least this seems  
to be the case around here). Adding new PRI lines adds to costs almost  
in a linear fashion (hardware has to be bought for each line just as  
well), while bandwidth comes at significant discounts in large  
quantities.

Though that's just my theory, since I myself don't really see this  
"trend" happening much. So far PRI is way more reliable as a  
technology to be easily replaced by SIP trunks... (again, this is just  
my point of view, my circumstances etc.)

Zoltan

Quoting Lelio Fulgenzi <lelio at uoguelph.ca>:

> Is there a fundamental reason users are going from PRI to SIP for   
> the PSTN connections? Is there a cost savings realized somewhere -   
> either hard or soft?
>
> I wouldn't mind hearing from the group.
>
> Lelio
> --------------------------------------------------------------------------------
> Lelio Fulgenzi, B.A.
> Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
> (519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> "Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo."      WJR



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