Technically Speaking

A really interesting article about VoIP protocols.  SIP beat out established protocols like H.323 & MGCP.

“As an industry grows, it is quite common to find multiple solutions that all attempt to address similar requirements. This evolution dictates that these proposed standards go through a stage of selection—over time, we see some become more dominant than others. Today, the Session Initiation Protocol (SIP) is clearly one of the dominant VoIP protocols, but that obviously didn’t happen overnight. In this article, the first of a series of in-depth articles exploring SIP and VoIP, we’ll look at the main factors that led to this outcome.”

Read more here

Makai Communications is now offering SIP Trunking for the island of Oahu in Hawaii.

Here are some of the details of the service:

Protocols supported – SIP, IAX2

Codecs supported – G.729, G.711

Can and existing numbers be ported – Yes

Are tollfree numbers supported – Yes

For rates and setup information please call 808-356-0022.

Yealink recently added the T18P entry level phone.

The phone is best suited for areas that do not need the pass through Ethernet jack to connect a computer, like a break room, lobby, or courtesy phone.

Because of the target market of the phone I was surprised when I saw was that is supports wideband audio – G.722.

Here are the detailed specs of the phone:

• TI TITAN chipset and TI voice engine
• 20 keys including 2 programmable keys
• Voicemail, Speed dial, 3-way conferencing
• Integrated voice response (IVR) system
• Voice codec: G.722, G.711u/A, G.726, G.729AB, G.723.1
• Auto provision via TFTP/FTP/HTTP/PnP
• Volume control, Ringtone selection, Distinctive ringtone
• 1xRJ45, 1xdual-color LED, Phone label
• Power over Ethernet (PoE): IEEE 802.3af class 1
• Desktop with footstand (detachable), Wall-mountable

Here is a link to the Yealink site