Archive for the ‘Cisco’ Category

The Acme Packet SBC is now on ACLI 7.3 code. Since the release of 7.x there have been a number of new enhancements. One of the most useful new features is Advanced Logging. This is like getting debug output in a log file without having to enable full debug. By setting a condition (or set of […]

The grep tool is a very popular Unix command line utility used to match a regular expression. Although “grep” doesn’t specifically exist on the Acme Packet SBC the find command serves a similar purpose.  This feature was introduced in ACLI release 6.4. NNOS-SD# find [configuration | running-config | command]  [attribute] NNOS-SD# find ? <string>    […]

With the recent release of the Acme Packet E-CX 6.4m2 software the SBC now supports Remote Survivability. This is applicable in both a Service Provider Hosted IP PBX environment and Enterprises with large remote office using SIP phones that register to an IP PBX in a centralized Data Center model. In this example I will […]

Recently Cisco announced a blueprint and name change to the CCIE Voice certification. Beginning on November 21, 2013, the new Collaboration written exam will be available and replace the current Voice written exam. On February 14, 2014 (Valentine’s Day in the United States) the new CCIE Collaboration practical exam will be in full effect. Are […]

Cisco Call Manager Express 8.5 (Unified Communications Manager Express) introduced support for the Cisco 9951 and 9971  phones but it was lacking support for the onboard camera and video calls. With CME 8.6 and newer, Cisco introduced support for the video camera on the 9951/9971 phones allowing for video calls as long as video and […]

The following VMWare specifications should be used when installing Cisco Unified Communications Manager 8 (Callmanager) as a virtual machine. This has been tested on both VMWare Fusion 3 for Mac and VMWare Workstation 7 for Linux. Note that it is best to pre-allocate your hard drive space if possible in order to get the best […]

Surrogate Registration using the Acme Packet SBC

Posted: 19th May 2011 by Mark in Cisco

The purpose of Surrogate Registration is to allow SIP endpoints that do not have the ability to perform SIP registration, or don’t gracefully manage their registrations very well, to appear as a registered endpoint on a SIP registrar platform such as Broadsoft BroadWorks. It is not always desirable to have a SIP endpoint function as […]

SIP 503 Service Unavailable is commonly seen in a VoIP network when a SIP device (such as a SIP server) is knowingly unable to process a call.  Typically when this happens the endpoint that originated the Invite will try the next available host it receives in the SIP Contact header.  In this particular example lets […]

When configuring a CUCM for SIP Trunk there may not be an SDP listed in the initial SIP Invite as it egresses the network.  If this is the case then the far end SIP endpoint receiving the call from CUCM will try and establish the codec type by including SDP in the 200 OK message […]

Cisco IOS contains a configurable object called SIP User Agent (sip-ua) where several different SIP settings may be altered from their default behavior.  The focus here are the settings for SIP Retry Invite and SIP Timers and why it makes sense to change the default settings on the router if calls should reroute over another […]