Cisco Phone Bootup Process
A key aspect to troubleshooting Cisco IP Phones is understanding how they boot up and register in the first place. This post is written with the explicit intention of simplifying…
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Cisco Voice Lab: Which Softphone Option is Best?
Believe it or not I spun up 4-5 Windows VMs and installed an instance of…
Common Extension Mobility Errors
Extension Mobility is great, but sometimes it can freak out. Justified or unjustified, here is a list of common errors you may experience with it along with their solutions. This…
Verifying Network Connectivity from Call Manager
If you are having issues with Call Manager not being able to connect to a device/network, a simple ping command may help you get a better understanding of the situation.…
Adding a User on Call Manager
You need to make a new user on Call Manager. How hard can it be right? Just add a user profile or something – easy right? Well you’d be half…
Blocking a Number on the Gateway
Nuisance callers are the worst. They could be telemarketers, spammers or even customers who feel they have been wronged. Whatever the reason for blocking someone from calling you, this short…
Debugging a SIP/ISDN Gateway
There comes a time in every Voice Engineer’s life where you will need to take debugs on the gateway. You can choose how you want to analyse your logs, do…
What is a CTI Route Point?
You may have come across this type of function when trawling through call flows in Call Manager. But what is it? Essentially, a CTI Route Point is a ‘station’ along…
How to Back Up Call Manager
You’ll be glad to know that backing up your Call Manager cluster is very easy. Heres how to do it. You will need: An SFTP Server with access to the…
What is a Hunt Group?
Sometimes we need to forward a call to a specific team of people or division rather than a specific individual. For example, if an employee wants to phone their HR…