Bill, You can read about the command here: http://www.cisco.com/en/US/docs/ios/12_3t/voice/command/reference/vrht_d1_ps5207_TSD_Products_Command_Reference_Chapter.html#wp1459139
The important bit is: When the dial-peer outbound status-check pots command is configured, if the voice-port configured under an outbound POTS dial-peer is down, that dial-peer is excluded while matching the corresponding destination-pattern. Therefore, if there are no other matching outbound POTS dial-peers for the specified destination-pattern, the gateway will disconnect the call with a cause code of 1 (Unallocated/unassigned number), So, when you have this command enabled (default) AND you have a single PRI AND that PRI is down, call set up request from UCM to the VG will result in a response of unallocated/unassigned. Why? Because we have told the router to monitor the status of the PRI and "intelligently" detect when it is down. When it is down, the dial-peer is no longer evaluated during call setup. By turning this off, we are basically telling the VG to go ahead and try to use the busted PRI. Which then results in a different kind of setup error that will let the CUCM know it should continue hunting through its RG/RL configuration. Lots of people leverage the service parameter I mentioned below to route around PRIs that are off line. That is probably fine for the purposes of the IE lab. I prefer to disable status checking at the GW level. -Bill -- William Bell, CCIE #38914 blog: http://ucguerrilla.com twitter: @ucguerrilla On Oct 18, 2013, at 10:06 AM, Bill Hatcher wrote: > Bill, > > One other question, I'm not familiar with the command "no dial-peer out > status pots" What's it do? > > > On Fri, Oct 18, 2013 at 7:44 AM, William Bell <b...@ucguerrilla.com> wrote: > I documented my strategy in my blog if interested. Part 2 in the series > focuses on building various tables and the read-through portion of the exam: > > http://ucguerrilla.com/2013/04/ccie-voice-lab-strategy-part-2-read.html > > Looking back at my notes, I have the following Ent / Service params that I > updated by default: > > > Enterprise Parameters: > > Auto Registration Protocol: SCCP > BLF for Call Lists: Enabled > Advertise G722 Codec: Disabled > URL Authentication: set IP instead of name > URL Directories: set IP instead of name > URL information: set IP instead of name > URL Services: set IP instead of name > Connection Monitor Duration: 60 (or do this at a device pool level) > > Service Parameters > BRQ Enabled: True > T302 timer: 5000 > H225 T302 timer: 5000 > G722 codec enabled: Disabled > iLBC codec enabled: Disabled > Intraregion Audio codec default: G729 > Inter-region Audio codec default: G729 > Automated Alternate Routing: True > Enable Mobile Voice Access: True > Inbound Calling Search Space for Remote Destination: Remote Destination > Profile + Line Calling Search Space > System Remote Access Block Numbers: <update as needed> > Transfer on-hook enabled: True > Display Original Calling Number on Transfer from Unity: True > Max Forward unregistered hops to DN: 1 > Allow peer to preserve h323 calls: True /*need to add appropriate > configuration on h323*/ > > Another service parameter I have seen people modify is the "stop routing on > unallocated number" parameter. People mod this to allow calls to hunt around > a H323 gateway that has a PRI which is down. I didn't use this method because > I think it is the wrong approach to fixing that problem. I leveraged the IOS > config command: "no dial-peer out status pots" > > > HTH. > > -Bill > > -- > William Bell, CCIE #38914 > blog: http://ucguerrilla.com > twitter: @ucguerrilla > > > > > On Oct 17, 2013, at 1:39 PM, Bill Hatcher wrote: > >> My test is just a couple of weeks away, and I've been reading different >> blogs on how to maximize your time. The one thing I'm really struggling >> with is mapping out my dial-plan during my read through of the lab. I would >> love to hear what others are doing. >> >> I have also been building base router configs for h323, gatekeeper, mgcp, >> srst,sip, etc so that I can practice quickly configuring those on the >> routers. >> >> One of the things I haven't really been keeping track of are some of the >> service parameters that I should adjust out of habit. Here are a few that I >> can think of off the top of my head that I plan on tweaking at the start of >> the exam. Please feel free to add to them. >> >> Enterprise Parameters >> DSCP for Phone Configuration - Set to AF31 >> DSCP for Cisco CallManager to Device Interface - Set to AF31 >> Change the Phone URL's to IP's >> Organization Top Level Domain >> Cluster Fully Qualified Domain Name >> >> Service Parameters - CallManager >> T302 Time - Know where it is if you need ot change interdigit timeout >> Call Classification - Offnet >> Builtin Bridge Enabled - True >> Device Name of GK-controlled Trunk That Will Use Port 1720 - Set as needed. >> Transfer On-hook Enabled - True (Also a great thing to do in production when >> migrating users from other phone systems) >> Block offnet to offnet transfers - Know where it's at. >> Auto Call Pickup Enabled - True >> Call Back Enabled Flag - True (Verify) >> Single Button Barge/CBarge Policy - Set to Barge unless otherwise directed. >> Stop routing on Unallocated Number Flag - False - H323 redundancy >> Preferred G.711 Millisecond Packet Size - 20 (Verify) >> Preferred G.729 Millisecond Packet Size - 20 (Verify) >> G722 Codec Enabled - Disabled (Unless otherwise directed) >> Intraregion Audio Codec Default - G711/G722 (Verify) >> Interregion Audio Codec Default - G729 (Verify) >> Automated Alternate Routing Enabled - True (This one gets me every time on >> AAR so I turn it on by default now) >> Enable Mobile Voice Access - Set as required >> Mobile Voice Access Number - Set as required >> System Remote Access Blocked Numbers - Set as required >> >> Service Parameters -Cisco IP Voice Media Streaming App >> Supported MOH Codecs - G711 mulaw and G729 Annex A >> >> HTH >> >> Bill Hatcher >> _______________________________________________ >> For more information regarding industry leading CCIE Lab training, please >> visit www.ipexpert.com >> >> Are you a CCNP or CCIE and looking for a job? 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_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
