SIP 100 Trying response code is part of the 1XX SIP Response Codes and one of the most commonly used SIP response codes in the SIP stack. SIP works on a request-response model and 1xx SIP response codes are there…
SIP 404 Not Found response belongs to the 4xx SIP code group.A group of SIP codes that indicate a request failure and constitutes a number of codes used by SIP for communicating errors and failures. In this blog post we…
Cisco CUBE HA is becoming more prevalent with the CSR1000 or vCUBE, therefore with its popularity, learning how to configure Cisco CUBE HA has become an essential skill that UC engineers should have.
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.
Step by step guide to configuring options Ping on CUBE. Learning how to busy out a dial-peer when a SIP trunk goes down. SIP Options Ping on CUBE.
Troubleshooting VoIP issues can be troublesome. When something goes wrong, the lack of direct visibility as to what is occurring on the network with SIP and RTP packets can initially be intimidating to network and voice engineers. However, Wireshark SIP…
Why don’t we start with some trivia?Did you know that SIP response codes are based on HTTP response codes? Actually, SIP response codes are the extent of the original HTTP ones and even define a new class with more response…
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)…
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.
There is no way around it,finding the SIP call flow is the first thing you have to do when you are facing a SIP call failure. Why?Easy.Because first of all, you have to understand whether this is a call routing…