SIP Archives - UCPros

Cisco SIP SRST Configuration

Pasha Teplitsky — Wed, 07 Oct 2020 13:00:00 +0000

Cisco SIP SRST Configuration is the process of providing backup to external SIP Call control (IP-PBX) through the provision of the basic registrar and re-direct server or back-to-back user agent (B2BUA) services. In this blog post, we will provide you with a step by step process that outlines a Cisco SIP SRST Configuration. There are … Continue reading Cisco SIP SRST Configuration

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SIP Response Codes Explained

Pasha Teplitsky — Sat, 08 Jun 2019 15:59:26 +0000

Why don’t we start with some trivia?Did you know that SIP response codes are based on HTTP/1.1 response codes? Actually, SIP response codes are the extent of the original HTTP ones and even define a new class with more response codes. I’ll let you know which one when we get to it. That said, not … Continue reading SIP Response Codes Explained

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Cisco SIP Gateway configuration: The Ultimate Guide

Pasha Teplitsky — Tue, 04 Dec 2018 22:23:40 +0000

Connecting the Cisco IOS Voice Gateway to CUCM via SIP has been the preferred way to do it in the past couple of years. The slowly dying H323 protocol (ISDN based) is not being developed anymore while SIP (HTTP based) became the industry standard for VoIP. So whenever PSTN connection is implemented via an IOS … Continue reading Cisco SIP Gateway configuration: The Ultimate Guide

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CUBE Configuration Step-By-Step. Part 2

Pasha Teplitsky — Sun, 14 Oct 2018 12:52:40 +0000

This is a second post in the series of CUBE configuration. You can find the first one here. In this post, I’ll cover some of the more advanced issues and scenarios that most of us are facing with CUBE configuration. Edit: I recommended using the CUBE Config Utility in conjunction with this post In the first … Continue reading CUBE Configuration Step-By-Step. Part 2

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CUBE Configuration Step-By-Step. Part 1

Pasha Teplitsky — Sat, 13 Oct 2018 16:00:49 +0000

It’s Monday morning, you are checking your Email after a long weekend just to find out that your boss was quite busy and you have been assigned a new project. The good news? It involves ITSP and CUBE. Edit: I recommended using the CUBE Config Utility in conjunction with this post I figure that you’ve already … Continue reading CUBE Configuration Step-By-Step. Part 1

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How to punch SIP One Way Audio in the face

Pasha Teplitsky — Sun, 29 Jul 2018 15:05:21 +0000

And why should you punch it in the face?To be honest, mostly revenge…Because one-way audio and no audio problems hurt.Really bad.Especially when they hit you by surprise, as they usually do. The thing is, I used to think that if we have signaling and the call is up,the audio part should be obvious. Even more … Continue reading How to punch SIP One Way Audio in the face

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