3102 question - access from cell phone

Question

Hello,
I am thinking about buying a SPA3102 after seeing the comments that you can access it from a cell phone or other landline.
My wife's family is overseas, and I want to use the free international calling from my Voip provider when she is calling from her cell phone or from her job.
I want to verify it will work with the following scenario.
I do not have any PTSN phone service.  I only have voip service. 
I do have a voip service with unlimited international calling.
Can I configure one of the ports on the 3102 with my current voip provider, and provision the second port on the 3102 to use another voip service (such as gizmo5 etc..).  My wife would call the gizmo number from her cell phone, enter a pin, and be able to dial internationally via the free international voip service?
As an alternative, is there anyway of doing this with just the single voip provider (and not worry about the second number)?
I just switched to my current voip service because ATT canceled CallVantage.  I am not very happy with the service, but I selected it because it was the only one with unlimited calling to South America, and had the ability to dial an access number to call free from a cell phone. 
I'd rather get a new voip service that has better quality, even if they don't have the cell phone access, if I can get the celll access from the 3102.
Thanks in advance.
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Answer 1

The SPA3102 doesn't allow voip-to-voip call bridging.  It only allows bridging a voip call with a pstn line (FXO port) call.  You possibly could use the SPA3102 to bridge a call to another voip service if you interface the other service's ata to the FXO port of the SPA3102.  Even if you do that it is not quite optimal and you may have problems.
Some voip providers do not allow you to configure your own adapter and insist that you use a locked adapter that they provide.  Others do not have this restriction.
When calling South America with VoIP you can encounter some severe quality problems depending on the voip provider and the provider they use to route and terminate the call.  Day of the week and time of day can also make a significant difference.  This probably has something to do with the bandwidth available to the provider on the long haul to South America.
One nice advantage of the SPA3102 is that you can setup up to four additional outgoing only providers on the adapter and this allows you to use additional pay-as-you-go (pay per minute) providers and have a choice in calling.
I would try different providers to sample the voice quality to the destination(s) you are calling to find the right combination of cost vs voice quality.
Four pay-as-you-go (pay per minute) providers to check out are CallCentric, Future-Nine, CallWithUs, and OneSuite.   Future-Nine and Callwithus have different quality levels (termination routes) that you can specify when you dial.  
The providers also have "access numbers" that you can call without having to use a pin although some have more numbers than others and with Future-Nine you can also access their "calling card" function thru SipBroker's access numbers. Access numbers are nice because you can use them without actually having a physical voip service.
With CallCentric you can also get a CallCentric DID (incoming number) and setup your own private incoming number as an access number.  CallCentric also has some South American DID's that you can setup as your own private access number..
Message Edited by hw on 10-24-2009 04:25 PM