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Agent Blog

What is it E911 (and USF) and why do we need it?

Jim Moorman on Jul 3, 2014 1:18:00 PM

VoIP Security

Brittany Feda on Jul 3, 2014 10:15:00 AM

The NAT and SIP Problem - Here's How to Fix it.

Tim May on Jun 30, 2014 11:46:00 AM

Updated July 2018

When dealing with VoIP traffic on today’s networks it is inevitable that you will run across an issue involving NAT and SIP. It is helpful to understand what NAT (Network Address Translation) does before you see why this causes a problem with SIP (Session Initiation Protocol).

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Topics: SIP Trunking, Voice over IP

SIP. A Primer. What the Heck is that?

Brittany Feda on May 14, 2014 3:03:00 PM

In the world of telecommunications, SIP is a buzzword used by many but often misunderstood. SIP stands for Session Initiation Protocol and is defined in RFC 3261. SIP is a signaling protocol designed to set up, tear down and modify phone calls on modern VoIP networks. To be clear, SIP is not what transports the actual audio stream for a phone call; that transport is provided by the RTP (Real-time Transport Protocol) in a modern VoIP network and will be addressed in a later blog post.

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Topics: Infographic, SIP Trunking, Voice over IP

3 Things You Probably Didn't Know About PBX Caller ID

Jim Moorman on May 12, 2014 1:39:00 PM

Your desk phone rings. You’re in the middle of a time sensitive report and glance over to see who’s calling. The PBX caller ID number is 888-555-5565 with a caller ID name of Unknown. You chalk that one up as a telemarketer and keep typing. Five minutes later the phone rings again. This time, the number is local and the corresponding name is that of your largest account, so you stop typing and grab the call.

Once in a while, though, the number is legitimate but the name is wrong. Why does it happen? And if you’ve ever been the one showing up as someone else to other people, you know how difficult it can be to remedy, especially if it’s started happening right after you’ve changed providers.

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Topics: SIP Trunking, Voice over IP, Caller ID

Symbiotic SIP Trunking - Rekindling the Romance Between Carriers and Dealers

Jim Moorman on Mar 19, 2014 1:16:00 PM

In the old days (early 2000’s), Data LANs and business phone systems were like my ex-wife’s birthday. She was born on December 29th, and while her birthday was only four days separated from Christmas, I was very sternly warned that they were never to be combined or merged in any way. They were two very separate events, just as voice and data were very separate technologies within the same physical office space.

Eventually, the technologies converged. The holidays never did. And it seemed to me that for the longest time (and even still today), data sales and implementation processes continued to remain separated from voice sales and implementation processes.

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Topics: SIP Trunking, Switchvox Phone Systems, Altigen Phone Systems, Voice over IP, Toshiba Phone Systems, Quality of Service, HPBX, 3CX Phone Systems

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