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Posted By: CGTech 911 over Strata and POTS - 10/29/09 06:49 AM
Our multi-system setup is causing us issues again. This time we're unable to route 911 the way we need to.

We've got several sites connected over StrataNet with only one site that has many PRI lines. Each site uses Leading Digits added on to connect to the Node the has the PRIs and dial a flexible access code to get the proper caller ID of their site for making outbound calls. This works great.

The problem comes when we try and route 911 calls. When someone calls 911 on any of the nodes except the node with the PRI in it, the system uses a particular OLG definded by Program 550 "Enhanced 911". I would like to have each node use the StrataNet connection then fall-back on the local POTS lines in the building for 911 routing. I cannot figure out how to use the StrataNet for 911 calls, though.

Can anyone help us out? I work for a school district so making sure this system works as reliably and simply as possible is a must.

Thanks in advanced, as always.
Posted By: RRino Re: 911 over Strata and POTS - 10/29/09 06:58 AM
Are you saying that each node has its own POTS lines that you want to use for 911 calls and all other general calls need to be routed over the StrataNet to the main node and out the PRI? If this is the case, you can set the POTS lines up in their own OLG and program 550 enter in that OLG number. You can also use LCR to recognize the 911 digits and route through a certain OLG which would be the POTS lines.
Posted By: CGTech Re: 911 over Strata and POTS - 10/29/09 07:07 AM
Each node has its own POTS lines. I don't want to use those as the primary route for 911 calls though. I'd like to use the StrataNet to the main node for every call including 911 calls, then fall back on the local POTS lines for 911 calls.

Essentially I want my 911 to route just like my normal calls and not do any of this special routing that doesn't give me any of the leading digits capabilities LCR gives me.
Posted By: RRino Re: 911 over Strata and POTS - 10/29/09 07:26 AM
I would think that you would want that the other way around, that you would want the 911 call to route out the local POTS lines first. This would:
A) give the 911 dispatch the correct address (even though it can be done via StrataNet by the correct programming)


B) eliminate any network issues that would have an effect on the StrataNet connection(s) and/or call quality (assuming you are using StrataNet via IP)

and

C) your POTS lines are gonna be more reliable than yur PRI, why not route your most important phone calls out the path of least resistance.
Posted By: CGTech Re: 911 over Strata and POTS - 10/29/09 07:51 AM
RRino, thanks for the advice. You make good points about using the POTS lines before PRI. It makes sense, but we need a backup because in some areas we don't have enough POTS lines. We have several small elementary schools that used to have 4 POTS lines in them. We have canceled two of them and they have 2 for backups and for use with a fax and the building's security system. We were originally told that we could have the system utilize the PRI lines on the remote system, then fall back to the POTS lines in case those were not functional. Our caller ID is setup properly with our DIDs and we're in direct contact with our town's emergency services to confirm all of this. What we want to avoid is going back to having 3-4 POTS lines per building when we've already invested in district-wide PRIs to cut down on lines.

I hope there is a work around to do this because it seems like a significant weakness in the StrataNet system that we couldn't make any emergency calls over it.
Posted By: RRino Re: 911 over Strata and POTS - 10/29/09 09:06 AM
Well in that case.... laugh

What you are gonna need to do is some fancy LCR programming then. Not sure what leading digits you are adding, but in program 522 you can add the digits 911 to the exception table and create a different route definition using 524,525,and 526 and be able to control the leading digits that way.

Then make sure to go back to prg 550 and set OLG 1 as your StrataNet OLG and then OLG 2 as your back-up POTS OLG.

LCR is quite confusing at the start but then when you get it all set up and working correctly, it all makes perfect sense.
Posted By: CGTech Re: 911 over Strata and POTS - 10/29/09 11:43 AM
It's unfortunate I'm AT the site that has the PRIs otherwise I'd give this a try right now. I'll head over to one of the sites soon and give it a shot. Thanks!

Btw, do I need to put in N11 or could I enter 911? Also, if someone dials 9911 would I have to also enter 9N11 or 9911 into the 522 program?
Posted By: RRino Re: 911 over Strata and POTS - 10/29/09 11:58 AM
I would put in just 911 since N means any number 1-9. I don't think you need to do the 9911 since the first 9 is the trigger for the system to use LCR then what is dialed after that is analyzed and routed per LCR rules.
Posted By: CGTech Re: 911 over Strata and POTS - 10/29/09 12:05 PM
the strange thing is that when I dial 9911 at a site, it rolls over to the CO lines like 911 does by itself. if I did put 9911 in there it would probably override that too, right?
Posted By: newtecky Re: 911 over Strata and POTS - 10/29/09 08:10 PM
There is a way to turn off enhanced 911, but I don't know if you would want that going over PRI or not, since you would want the outgoing callID to be sent correctly. I know there is a perimeter just for 911 caller ID in prg 200 for example.

The last time I really I played arould wioth e911 I found that even when you select a line directly, 911 would always follow the OLG set in e911 settings. So I know it overrides direct line selection, so it may also override LCR.

Have you tried changing Prg 550 to the OLD for the Stratanet?
Posted By: CGTech Re: 911 over Strata and POTS - 10/30/09 05:17 AM
I'd be interested if anyone out there knew how to turn that off and just use normal LCR routing.

It sounds like a good thing that 911 would always override in a particular way. It's just the only thing you can do for 911 routing is selecting OLGs in a particular order and not setup anything else (like the 524 prg Route Define page has).

I have tried changing Prg 550 to use OLG 10 (our ISDN stratanet olg) and also OLG 1 (our POTS lines for backup) next. This didn't work since OLG 10 is just a StrataNet connection and doesn't have anything in it that specifies it use Node X or Node Y. Nor does it have anything to add leading digits to the call.

Like I mentioned briefly above, our Nodes have an OLG 10, which is an ISDN connection (our StrataNet). We use the Route Define screen (prg 524-526) to setup the Route Choice for Stations setup to a particular LCR to use OLG 10 with a Digit Modification Index (prg 525). This Modification Index goes to prg 526 where we use 02 Add Leading Digits to add the PRI Node's number plus a Flexible Access Code. The flexible access code is on the PRI Node and uses feature "Line Group access code - one access code for each OLG" setup for a particular OLG. The OLGs on the PRI Node are setup using ISDN Call By Call to place them in a PRI's group. From there we add a Calling Number so that the outbound caller id is setup properly.

It's all one giant setup just to get proper caller ID to work properly when an outside call is made from other sites that don't have a PRI (which is all but one site).

This is clear as mud I'm sure.
Posted By: RRino Re: 911 over Strata and POTS - 10/30/09 07:54 AM
Look in prg 105 System Parameters, FB08 is to enable/disable E911.
Posted By: red_ron Re: 911 over Strata and POTS - 10/30/09 03:00 PM
E911 routes over StrataNet fine
When E911 is enabled, all LCR/DR is disabled and the call routes over the OLG selected in Prg 550.
What I sure is missing, on the remote nodes
Prg 672 FB08 E911 Priority on the correct Node is not set. By default this is set to 0, make this a 1 and your calls with CallerID programming in Prg 200 FB 46.

Also, a E911 call will fail if in Prg 400, there is an invalid destination.
Prg 117 N11 = 3
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