An exciting feature of Exchange 2010 is its support for message waiting indicators (MWI).  While this doesn’t seem like that big of a deal, one of the biggest complaints about Exchange 2007 was its lack of MWI support.  Even though Exchange Unified Messaging is able to send voicemails to an email address, most users are accustomed to the phone notifying them when they have new voicemail.

Even more exciting were the reports that MWI with Exchange 2010 and Cisco CallManager 7 just worked out of the box without extra configuration. Many articles I read spoke of the ease of configuration at getting this feature enabled. This, however, was not the case in our lab.  As it turns out, some of the default settings for SIP trunks in CCM 7 will cause problems with MWI.

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Class Maps are referenced by Policy Maps, which are then applied to the external interface.  VPN traffic is "pre-classified" before entering the external interface. The example below is based on 512 kbps bandwidth available for upload traffic.

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The Cisco NetPro forum is an excellent resource when searching for answers to Cisco specific issues.  To my knowledge Google doesn’t index these forums, but Cisco made a browser plug-in that adds a NetPro forum search option to your browser’s existing search bar.  http://www.cisco.com/web/tsweb/searchplugins/plugin_homepage.html#

One of my favorite things about my job is working with Cisco’s Unified Communications Manager (CUCM). It’s so robust and complex that there always seems to be something new to learn.  Last week I ran into a couple of interesting issues that I thought I’d share with you.

The first is an issue for which I’ve been trying to find a solution for several weeks.  One of our clients was experiencing issues with external auto-attendants recognizing the DTMF tones their phones were sending.  What made this issue particularly strange is that if the user was on speaker phone they were able to get the remote AA to respond to the DTMF tones without issue. (more…)