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| a) Almost every voip phone seems to be a Skype phone ! they seem to have it sewn up ! Can anyone recommend a voip phone that can be used with other voip services such as iPhox, voipcheap, etc ? |
I can only think of a small handful of Skype phones!
Meanwhile SIP based systems have entries from among dozens of others:- Aastra, Grandstream, Snom, Sipura, all the system makers, plus numerous badged jobs and that is before you look at softphones. Try entering SIP Phone into Google, or check voip-info.org.
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| b) Say we get three phones and connect them to the router. How do we pass a call from user to user ? Do we have to still get a PABX system ? |
Dial by IP, dial the phones number, use a voip gateway.
There are four benefits to having a PBX/voip gateway:
i/ It allows you to make best use of a single account i.e. 3 phones = 3 Accounts at voipcheap (or whoever)
ii/ It will minimize any problems with NAT and SIP.
iii/ It allows you to integrate your PSTN line with Voip phones
iv/ It does make extension ringing simpler and avoids loading your Internet connection unecesarily