Posts Tagged ‘Cisco Unified Communications Manager’

May
17

Continuing on in our series on CCD, today we’ll look at the 3rd video (the shortest) in that series (video #55) from our current 62-hour CCNP Voice v8 bootcamp.

  • CCD via SAF :: Overview (29m)
  • CCD via SAF :: CUCM Inter-Cluster Call Routing (1h 32m)
  • CCD via SAF :: CUCM Call Routing with PSTN Failover (29m)
  • CCD via SAF :: CUCM Call Routing during SRST Fallback (48m)
  • CCD via SAF :: CUCM to CME Call Routing (54m)
  • CCD via SAF :: Inter-Cluster RSVP via SIP Preconditions (21m)

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Apr
27

So we continue our series on CCD, something that is being talked about lately – in conjunction with UCM SME (Session Management Edition – think UCM as a Gatekeeper for other UCM clusters) – and something that is bound to be covered on the next version of the CCIE Voice blueprint (something that’s received a lot of chatter lately with the advent of UCM v9 beta training this week). Also, a topic that you must know understand well today if you are studying for your CCNP Voice CIPT2 exam.

Today we’ll look at the 2nd video in that series (video #54) from our current 62-hour CCNP Voice v8 bootcamp.

  • CCD via SAF :: Overview (29m)
  • CCD via SAF :: CUCM Inter-Cluster Call Routing (1h 32m)
  • CCD via SAF :: CUCM Call Routing with PSTN Failover (29m)
  • CCD via SAF :: CUCM Call Routing during SRST Fallback (48m)
  • CCD via SAF :: CUCM to CME Call Routing (54m)
  • CCD via SAF :: Inter-Cluster RSVP via SIP Preconditions (21m)

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Mar
19

I just finished up 2 weeks of a really great CCNP Voice bootcamp, covering all 5 of the latest 8.0 version exams from Cisco (CVOICE, CIPT1, CIPT2, CAPPS, & TVOICE). All in all we ended up with 62 completely brand-new hours of informative video that we are sure you will be excited to watch when they are posted to our streaming and download sites here in probably just about a week. We went fairly in-depth on most every topic, one of them being MGCP during our TVOICE section of class.

BTW, with this new 62 hours of CCNP Voice video, this brings INE to 320 hours of total CCNA-to-CCIE Voice video-on-demand training. Far, far more than any other vendor. And it is all up-to-date and taught by me, not by subcontracted instructors.

You may recall that in my last post related to MGCP Troubleshooting, we took a basic look at the MGCP commands that a Call-Agent (server) instructs a Gateway (client) to preform – something the RFC refers to as “verbs”.

In this post, we are going to take a look at the output of the “debug mgcp packets” command for a single call, and then break down each section of the output into “transactions” (i.e. Command and Response).

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Feb
11

This isn’t exactly the latest news, and doesn’t effect the CCIE Voice Lab exam (although it very well may effect the new CCNP Voice exams), however I am hearing more and more how people are upgrading their Voice routers with newer 15.x IOS code, and not realizing how existing (working) VoIP calls are being broken due to new, intelligent feature default configurations.

Last July, Cisco decided (wisely, IMHO) to create a new style of Toll-Fraud prevention to keep would-be dishonest people from defrauding a company by placing calls through their misconfigured voice gateway(s), at the company’s expense. This new mechanism works by preventing unintended TDM (FXO/CAS/PRI) and VoIP (H.323 & SIP)┬ácalls from being able to be placed through a given company’s voice gateway(s), by simply blocking all unknown traffic. Beginning in IOS 15.1(2)T, Cisco added a new application to the default IOS stack of apps that compares all source IP address with an explicitly configured list in the IOS running config, and if the IP address(es) or subnets do not match, all VoIP traffic is denied. Also, the new default for all POTS voice-ports is to not allow secondary dial-tone, making direct-inward-dial the default for CAS/PRI, and PLAR necessary for FXO.

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