This is interesting topic for me as well. And been user of SPA3102 and SPA3000 (not the high end gateways though) I've discovered that they are not supporting call progress indications (i.e. your phone will never show something like "Ringing" if you are calling PSTN line - it will display "Connected" even if there ringing tones on the line and same goes to busy - it won't show "Busy" - just silently disconnects without giving up reason) and "Flash" function - thus no use of call waiting (it does not decode Visual call waiting too). That is why I want to repeat your question with attention to mentioned details. And yes - echo thing is also important.
Regards, Alex On Mon, 2007-04-02 at 19:44 -0500, Steven McCann wrote: > Hello, > > I would like to know if anyone could tell me some of the pros and cons > from using a external FXO adapter (such as the Linksys spa400 or > Grandstream GXW-4104) compared to using an internal FXO adapter such > as a digium or other company's card. The price ranges seem to be the > same or maybe a bit cheaper for the external devices. The setup I am > looking into is for 2-3 FXO line system. > > External seems to have some benefits such as easy installation, easier > redundancy (for having a separate server configured if a main one goes > down). Are there any drawbacks in terms of sound quality, > configuration or feature support? > > Some setup options we would like to have are: > -the ability to register/display multiple lines from the IP phones > -the ability to answer a call from call waiting, or if there is a > cost-effective way to set something up with Bell that a second call to > a number could come to another incoming line and be answered by the > IVR > > Any information is greatly appreciated. > > Regards, > Steven
