Archive for the ‘Cisco’ Category

This is a brief explanation of how to retrieve the Music on Hold files from Cisco Unified Communications Manager 7 and load the files into a router’s flash for remote-site streaming directly from the router.  Alternatively, if you have Call Manage Express and do not care about using a G729 audio file then you may [...]

MeetMe conferencing with Call Manager Express allows a CME phone to go off hook, press the MeetMe softkey, and dial the MeetMe bridge number to start a conference. Any other CME subscriber or off-net party may dial the MeetMe number to join the conference.  By default CME does not play tones when participants join or [...]

Configure 802.3ad Link Aggregation for Broadworks

Posted: 13th July 2010 by Mark in Cisco

The Broadsoft Software Management Guide provides an example for configuring active/backup Ethernet interfaces (called mode 1) when configuring bonded Ethernet on a single Red Hat Enterprise server.  Only one Ethernet interface is transmitting and receiving traffic at a time while the other interface is in standby mode.  My preferred approach is 802.3ad Link Aggregation Control [...]

When configuring a SIP Trunk with Unified Communications Manager to a SIP Service Provider there is a need to use a router running CUBE (Cisco Unified Border Element) between UCM and the provider offering the SIP Trunk.  One benefit is this automatically alleviates the challenges most IP PBX’s face with hosted nat traversal specific to [...]

Cisco’s hidden Gatekeeper debug command

Posted: 13th January 2010 by Mark in Cisco

The following undocumented command is useful for debuging H323 messages.  This command cannot be found in the help-context of IOS as noted below. router# debug gatekeeper main 10 router# debug gatekeeper ? gup Gatekeeper GUP messages load Gatekeeper load-balancing messages servers Gatekeeper Servers The great thing about this command is the simplicity in the debug [...]

Cisco CSIM (Call Simulation) – Hidden IOS Command

Posted: 5th December 2009 by Mark in Cisco

CSIM is an undocumented IOS command.  When configuring a router to act as a voice gateway it is possible to test outbound calls by originating calls from the router.  If the router is configured correctly then the far end number will ring and may be answered. Use the csim start dialstring hidden command to initiate [...]

Cisco ASYNC NM-16A Console Management

Posted: 22nd November 2009 by Mark in Cisco

The following is an example of using a Cisco 2811 slotted with an NM-16A ASYNC module to manage other Cisco devices as if you were connected to them locally with a laptop and a serial connection. The ASYNC modules are available in different port densities. There is also an HWIC version. router# show hardware Cisco [...]

Cisco 7965 SCCP to SIP Firmware Upgrade

Posted: 17th November 2009 by Mark in Cisco, SIP

Recently I needed to change the firmware on some Cisco 7965 phones from SCCP to SIP. By far the simplest method is loading the COP file on UCM and letting the phone upgrade on its own.  In my case, this upgrade was being done without using UCM.  The Cisco read-me doc for the SIP firmware [...]

Unified Communications Manager 7.1(3) in VMWare

Posted: 10th November 2009 by Mark in Cisco

The latest media from Cisco is 7.1.3a for Unified Communications Manager and Unity Connection. CUPS is now 7.0.5.  There are some things to be aware of when trying to load Unified applications in VMWare.  Here are the specifications for a successful installation. NOTE: When performing the installation choose  “skip” when first prompted to use the [...]

Cisco IOS Archive Command

Posted: 10th October 2009 by Mark in Cisco

Something commonly overlooked is how to store incremental backups of your Cisco router configurations. Some people use Rancid or Kiwi Cat Tools and they are great, but what most people do not realize is IOS 12.3(4)T and higher has an archive command. Each time you perform a write mem or copy run start the router [...]