gusherb
Well-known member
We used to have two landlines. The one with the DSL came out of the Remote Terminal. The original one came out of the CO about 3.5 miles away. When ordering a new line they will by default connect to the CO and not the RT.
In regards to voice quality, a properly done VoIP setup sounds just as good if not better than POTS service. POTS used G.711 and VoIP typically uses that by default as well, so VQ theoretically should be identical and it usually is. I have all the analog phones plugged into an ATA, one that I can adjust all the electrical parameters on and have set it to the same specs the PSTN ran on and have verified with a simple meter that it's working like it should. I even adjusted the receive and transmit volume on the ATA to be identical to the typical POTS line. Most ATA's by default come with the tx/rx cranked way up causing distortion. I am as close to a true landline as I can get on my cheap Obi100 ATA without having an actual landline.
The internet aspect of VoIP is the real tricky part, the public internet was never designed to carry time sensitive live voice packets and can be very fickle about transmitting them without major flaw. It is key to have a decent QoS setup on the home router to at least ensure the VoIP quality isn't being trashed by other data using applications running on the LAN. Once it gets past the router and onto the public internet, anything goes.
If you have cable VoIP or telephone company VoIP like AT&T Uverse voice, it is the same SIP protocol as any other VoIP provider but the traffic stays exclusively on their network where they have full control over it, and when it has to leave their network it travels over the PSTN where voice traffic has its own dedicated pathway. So none of the potential issues one may suffer by using standalone VoIP is an issue with these cable/phone company services.
As for Ooma, it's not the best quality in my experience. They don't use the G.711 codec by default, they use a more compressed codec called iLBC. My experience with it has not been so great. You may contact them and have them lock your device to G.711 (which improved things for me a good bit) by following the steps in the link below. I use an excellent VoIP provider, Callcentric, with my ATA and it works very good. Another VoIP provider that will provide an ATA with their service is VoIPo, it is plug and play. (Callcentric requires you provide and setup your own device).
Also, my best sounding phone is an IP phone.
http://https//dev-www.ooma.com/forums/viewtopic.php?f=16&t=20380
In regards to voice quality, a properly done VoIP setup sounds just as good if not better than POTS service. POTS used G.711 and VoIP typically uses that by default as well, so VQ theoretically should be identical and it usually is. I have all the analog phones plugged into an ATA, one that I can adjust all the electrical parameters on and have set it to the same specs the PSTN ran on and have verified with a simple meter that it's working like it should. I even adjusted the receive and transmit volume on the ATA to be identical to the typical POTS line. Most ATA's by default come with the tx/rx cranked way up causing distortion. I am as close to a true landline as I can get on my cheap Obi100 ATA without having an actual landline.
The internet aspect of VoIP is the real tricky part, the public internet was never designed to carry time sensitive live voice packets and can be very fickle about transmitting them without major flaw. It is key to have a decent QoS setup on the home router to at least ensure the VoIP quality isn't being trashed by other data using applications running on the LAN. Once it gets past the router and onto the public internet, anything goes.
If you have cable VoIP or telephone company VoIP like AT&T Uverse voice, it is the same SIP protocol as any other VoIP provider but the traffic stays exclusively on their network where they have full control over it, and when it has to leave their network it travels over the PSTN where voice traffic has its own dedicated pathway. So none of the potential issues one may suffer by using standalone VoIP is an issue with these cable/phone company services.
As for Ooma, it's not the best quality in my experience. They don't use the G.711 codec by default, they use a more compressed codec called iLBC. My experience with it has not been so great. You may contact them and have them lock your device to G.711 (which improved things for me a good bit) by following the steps in the link below. I use an excellent VoIP provider, Callcentric, with my ATA and it works very good. Another VoIP provider that will provide an ATA with their service is VoIPo, it is plug and play. (Callcentric requires you provide and setup your own device).
Also, my best sounding phone is an IP phone.
http://https//dev-www.ooma.com/forums/viewtopic.php?f=16&t=20380