sundance-communications.com/forum Forums VOIP Phones & IP PBX VoIP & Cloud Phones, Hosted PBX, General IP Phones VoIP 101

Found the below link while looking for a new driver for my DVD burner. Very informative and has a total of 5 pages using the drop down box.

https://www.cdrinfo.com/Sections/Reviews/Specific.aspx?ArticleId=15327

I didn't read through the whole thing, but anyone mentioning h.323 as "the 2 big players"
is a little behind. NO ONE is proposing using h.323 for VOIP. Probably the biggest player for h.323 was Polycom for their audio conferencing units and even they are/have switch to SIP.
SIP is still not a standard, but if I had to comapre the 2 it would be VHS vs beta - beta being h.323

Yea well I did title the topic VoIP 101 (elementary layman language) because there are still people out there (and on this board) who don't even know what H.323, CODEC's, etc are about. I read posts here where people are completely adamant about VoIP because they don't know or understand the technology, let alone are they ware that VoIP and SIP trunking is in place for providing dialtone to the enduser. The price of copper at recycling plants is going to drop dramatically in the next few years due to the excess metal material.

Corwyn. We've found that while H.323 is an older protocol it is better than SIP in some ways. 1) takes less overhead bandwidth for same codec 2) is more stable over WANs 3) is used by manufactures with the best feature sets. Such as 3Com and Comdial.

How does calling 911 work when using VOIP ? I still cannot get that question answered .

I have many networked sites using VoIP for tying the multiple sites together. In Time Warner territory you can have a single (or multiple) PRI at the hub and distribute DIDs through to the nodes. The 911 database then can and does reflect the physical address based on the outbound caller ID from the calling set. Teleworkers having sets at their houses or remote locations is a different story.

RBF

If I understand you correctly you have a PRI at the hub that provides incoming DID and 9th level access to remotes sites over VOIP . The BTN on the PRI is listed as the hub sites address . The VOIP BTN is listed as the remote sites address or the hubs site address ? Where is the 911 address translation taking place with Time Warner or within your PBX programming or the VOIP BTN being carried over the D channel of the PRI ? Excuse my ignorance with VOIP it's not something we use when connecting to remote PBX Nodes. We do however have numerous sites with a differnt address that share PRI services with a hub via DPNSS/MSDN .

The PBX has nothing to do with 911 info with the exception of outbound caller ID. The Time Warner database to 911 contact center has been updated to reflect a call from this DID sequence is located at this physical address. A separate list of DIDs on the PRI reflect a physical address at a different location. It's purely based on the outbound CID. So if a tech programs a CID outside their range allotted to their physical address there is an issue with wrong address reported.

RBF

Thank You , the light bulb just lite up . Now I am on the same page as you .

Thanks Again For Your Time . :thumb: