Its always a lot of fun remembering how to hack up makefiles and configure scripts. Â Takes me back to my good old days when a blinking prompt for a C shell was what I used to stare at all day. Â Last night I was fooling around with ImageMagick for another [...]
Talk about an error that just doesn’t make any sense! The Cisco documentation discusses error numbers 1-4 but never talks about error 0. I was running into this problem a number of times when I was trying to get paging to work with an InformaCast paging server, Cisco 7941 and [...]
Working with Communications Manager Express means learning how to accommodate some of the features we are used to in the full Communications Manager release. Today I had a need to provide maximum calls and busy trigger capabilities on a CME box. If you aren’t familiar with max calls and busy [...]
Last time I looked it was August and I was sweating to death. Next thing I know I’m stuck in November and its freezing outside. Passed my written exam in the meantime, hooray! Haven’t scheduled a lab date but am tentatively considering April/May before the Eurotrip.
I really want to continue [...]
Cisco CallManager achieves redundancy through the combination of groups and device pools. The groups are usually one of the very first things you will configure when you begin configuring your new servers. When Cisco phones startup they download a configuration file from a server specified by DHCP options (150 or [...]
In the first installment of the Written Blueprint Series, we’re going to go through what codecs and regions are. This installment series will walk through the entire written blueprint for the CCIE voice exam. I’ll try and feature the book that I think covers the topic the best along with [...]
Just recently I was working on a network that was experiencing route flapping within OSPF. I noticed it when I issued a show ip route on a couple boxes and saw that the routes were less than a minute old on all OSPF advertised paths. Something was broken and [...]
Its that time of year again. Time to break out the kilt, eat some baklava then do some Tai Chi to work it off. That’s right, the Festival of Nations is coming up (click here for more info). August 25 - 26th in Tower Grove Park. I’ll be there, [...]
Some organizations don’t believe in deleting the accounts of employees who are no longer with the company. Perhaps you work at one of these organizations. Problems arise here if we’re not careful, particularly the fact that we end up with an awful lot of subscribers eating up licenses. Now, if [...]
Cisco has really learned a lesson and has decided that it was probably best to avoid integrating with Active Directory and extending the schema. This probably had a lot to do with people jacking up their AD when they were integrating or post-integration. CallManager 5 has the answer. Let’s have [...]
So CallManager PRI backhaul doesn’t want you to use application mgcp app according to the first part of this Cisco documentation. It clearly states do not use the application command on the POTS dial peer.
What’s great is, if you scroll down to the bottom of the document, it shows [...]
According to the Cisco documentation regarding Quality of Service required for Cisco CallManager, the AF31 to CS3 change is already underway within their internal development groups. Makes you wonder though, why does the latest CCM 5.x Technical Information Site include configurations that specifically call out AF31?
In addition, why [...]
Live on the Levee concert series continues again for another year. Check out Celebrate St. Louis’s website for more information about scheduling and times. Like last year, Justin’s going to be down there working. Say hi if you run into him 
Reducing bandwidth is key in corporate WANs. Flash-based MOH provides this functionality at no additional cost.
Music on hold servers are, by traditional design, the CallManager servers. Because of this practice, there are a number of corporations’ offices consuming bandwidth if their clusters are centralized in a data center or corporate [...]
Cana.Net has been a lot of things since it first started in 1998. It has evolved over the years just as I have. Originally an ISP (I started working at an ISP in ‘95), then a shell hosting service, then a web hosting service, then a blog, a podcast site, [...]
