[cisco-voip] Drop call for 911?

Thu Dec 18 17:09:15 EST 2008

Here it is:

have 2 POTS lines coming in on an FXO via 2801 MGCP with  CM 6.1.  Call flow
is external calls come in via those two POTS lines.  All out bound calls go
over WAN and out Central site.

had the problem the other day when they dailed 911 the already had two
incoming calls that were active.  Thus the 911 calls that are CSS to go out
the 2 POTS lines could not.  Ryan suggested MLPP.

Tried to set it up but does not work so I opened a TAC case.  Basically per
this doc.  FXO is not supported (or work for that matter)

http://www.cisco.com/en/US/docs/ios/12_3t/12_3t14/feature/guide/gtstcapp.html#wp1119122
So I gues I need to buy another VIC and order another POTS Line just for 911
access unless somone else has a better idea.  I was scheduled to buy CER
which would have also taken care of it.... but with Budget cuts lately
that's out too.

I'm all ears for other ideas.

Scott

On Mon, Dec 15, 2008 at 10:11 PM, Wes Sisk <wsisk at cisco.com> wrote:

> forgive my terminology here, i worked on the feature but resisted the
> dictionary.
>
> i believe MLPP can only preempt a lower priority call. the first 4 911
> calls will go with the same priority level.  the 5th call has the same
> priority level as the previous 4.  5th call will not preempt the previous 4
> calls of the same level.
>
> if you're saying that calls 1-4 are 'normal' calls with lower priority then
> the 5th call can route via 911 translation pattern, increase priority, and
> preemtp the first calls.  you can setup locations CAC to get the gateway
> only allowing 4 calls. MLPP will interact with CAC to drop the existing
> call.
>
> All that said enabling MLPP changes lots of native CUCM behavior such as
> forwarding intercepts. this may be an overkill.
>
> /wes
>
>
> On Monday, December 15, 2008 9:34:19 AM, Fuermann, Jason <JBF005 at shsu.edu><JBF005 at shsu.edu>wrote:
>
>   I only say that because I have not heard of anyone successfully using
> MLPP for 911, and without MLPP there is only one way to ensure a 911 call
> goes out.
>
>
>
> *From:* cisco-voip-bounces at puck.nether.net [
> mailto:cisco-voip-bounces at puck.nether.net<cisco-voip-bounces at puck.nether.net>]
> *On Behalf Of *Dennis Heim
> *Sent:* Friday, December 12, 2008 7:29 PM
> *To:* Fuermann, Jason; lelio at uoguelph.ca; Scott Voll
> *Cc:* cisco-voip voyp list
> *Subject:* Re: [cisco-voip] Drop call for 911?
>
>
>
> CAMA is old school… but they work and do their job without much work at
> all.
>
>
>
> Dennis Heim
> Network Voice Engineer
> Berbee
> 11711 N. Meridian Street, Suite 225
> Carmel, IN  46032
>
> 317.569.4255 Office
> 317.569.4201 Fax
> 317.694.6070 Cell
>
> dennis.heim at cdw.com
> www.berbee.com
>
>
>
> *From:* cisco-voip-bounces at puck.nether.net [
> mailto:cisco-voip-bounces at puck.nether.net<cisco-voip-bounces at puck.nether.net>]
> *On Behalf Of *Fuermann, Jason
> *Sent:* Friday, December 12, 2008 4:56 PM
> *To:* 'lelio at uoguelph.ca'; Scott Voll
> *Cc:* cisco-voip voyp list
> *Subject:* Re: [cisco-voip] Drop call for 911?
>
>
>
> Don't rule out a CAMA trunk
>
>
>
> *From:* cisco-voip-bounces at puck.nether.net [
> mailto:cisco-voip-bounces at puck.nether.net<cisco-voip-bounces at puck.nether.net>]
> *On Behalf Of *lelio at uoguelph.ca
> *Sent:* Friday, December 12, 2008 3:09 PM
> *To:* Scott Voll
> *Cc:* cisco-voip voyp list
> *Subject:* Re: [cisco-voip] Drop call for 911?
>
>
>
> Looks like BRI time for you!
>
> Lelio Fulgenzi, Senior Analyst
>
> Computing & Communications
>
> University of Guelph
>
> 519-824-4120 x56354
>
>
>
> ...sent from my iPod - please pardon my fat fingers ;)
>
>
>
> [XKJ2000]
>
>
> On Dec 12, 2008, at 3:58 PM, "Scott Voll" <svoll.voip at gmail.com> wrote:
>
>  H323 is supported?  with FXO?
>
>
>
> It seems Like FXO on a MGCP VGW may not be supported.
>
>
>
> Scott
>
>
>
> sr. 610287387
>
> On Fri, Dec 12, 2008 at 11:20 AM, Ryan Ratliff <rratliff at cisco.com> wrote:
>
> I've never configured it personally but it does show that H.323 gateways
> are supported for MLPP.
>
>
>
> You'd definitely have to do some testing.
>
>
>
> -Ryan
>
>
>
> On Dec 12, 2008, at 2:00 PM, Michael Thompson wrote:
>
>
>
> I know a couple of people that have tried to use MLPP for this app.
>
>
>
> If you look at the specs, there are specific requirements for use of MLPP.
>
> Analog lines don't fit into that spec.
>
>
>
>
>
>
>
> -----Original Message-----
>
> From: cisco-voip-bounces at puck.nether.net
>
> [mailto:cisco-voip-bounces at puck.nether.net<cisco-voip-bounces at puck.nether.net>]
> On Behalf Of lelio at uoguelph.ca
>
> Sent: Thursday, December 11, 2008 3:45 PM
>
> To: Scott Voll
>
> Cc: cisco-voip at puck.nether.net
>
> Subject: Re: [cisco-voip] Drop call for 911?
>
>
>
> MLPP enabled route patterns?
>
>
>
> Lelio Fulgenzi, Senior Analyst
>
> Computing & Communications
>
> University of Guelph
>
> 519-824-4120 x56354
>
>
>
> ...sent from my iPod - please pardon my fat fingers ;)
>
>
>
> [XKJ2000]
>
>
>
> On Dec 11, 2008, at 2:50 PM, "Scott Voll" <svoll.voip at gmail.com> wrote:
>
>
>
>  I have a site that has 4 Pots lines and those are also the lines
>
> they would dial 911 on.  if all 4 lines were in use, is there a way
>
> to disconnect one so that the 911 call could still go out?  CM 6.1.2?
>
>
>
> other options beside more Pots lines or removing one of the incoming
>
> lines?
>
>
>
> TIA
>
>
>
> Scott
>
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