[cisco-voip] FXO/FXS

[Paul Choi]

I think the first order of business would be to find
what sort of signaling the PBXs ARE using if they're
not using E&M.

--- SAUD HASSAN <hassansaud at hotmail.com> wrote:

> Dear All,
> 
> I need a solution for simple conectivity.
> 
> I have three offices in three diffrent cities and i
> want to conect them for 
> voice and video calls.these offices will be conected
> with each other through 
> VPN (Internet Bandwidth on DSL).PBX are of dirrent
> vendors and dont have E&M 
> Port in it.each office should be able to dial the
> Extension in each office.
> 
> Office1 Telephone --> PBX --> Router1-->VPN(Over 
> Internet)--->Router2-->PBX-->Office2 Telephone
> 
> can any one sugguest me which cards should i use FXS
> or FXO.or any other 
> possibilities.
> 
> Regards
> 
> Saud Hassan
> 



       
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