[Asterisk-Users] 911 and ISDN PRI

Watkins, Bradley Bradley.Watkins at compuware.com
Wed Feb 8 04:10:09 MST 2006


It looks like the outbound caller ID is not being set properly.  Most of the
carriers that I've dealt with will act exactly as you said if you do not set
it to what is expected at the 911 center.
 
In particular:
 
> Calling Number (len= 8) [ Ext: 0  TON: Subscriber Number (4)  NPI:
ISDN/Telephony Numbering Plan (E.164/E.163) (1)
>                           Presentation: Presentation permitted, user
number not screened (0) '3251' ] 
 
Your user number being sent is just the caller ID of the SIP channel.
 
Regards,
- Brad

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Joe Pukepail
Sent: Tuesday, February 07, 2006 3:26 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] 911 and ISDN PRI


I have a call in with the carrier, below is the PRI debug, looks like it is
getting hungup because of "Invalid Number format", I did try to use
Setcallerid to change the callerID to a DID number in a previous attempt,
but it still didn't go through.   Not sure if that "invalid number format"
is the calling number or the number I'm calling.  I'll let the list know the
result.  
 
I would encourage everyone to test their 911 functionality (especially if
you have a PRI), I almost didn't check it.  The PRI is up and 411 works, so
I almost assumed that 911 would work.   Make sure you call the police
station first to make sure they are not swamped by real emergency calls and
let them know you are testing . 
 

    -- Executing NoOp("SIP/3251-7316", "3251") in new stack
    -- Executing Dial("SIP/3251-7316", "Zap/g2/911") in new stack
-- Making new call for cr 33144
    -- Requested transfer capability: 0x00 - SPEECH 
> Protocol Discriminator: Q.931 (8)  len=44
> Call Ref: len= 2 (reference 376/0x178) (Originator)
> Message type: SETUP (5)
> [04 03 80 90 a2]
> Bearer Capability (len= 5) [ Ext: 1  Q.931 Std: 0  Info transfer
capability: Speech (0) 
>                              Ext: 1  Trans mode/rate: 64kbps, circuit-mode
(16)
>                              Ext: 1  User information layer 1: u-Law (34)
> [18 03 a9 83 81]
> Channel ID (len= 5) [ Ext: 1  IntID: Implicit, PRI Spare: 0, Exclusive
Dchan: 0 
>                        ChanSel: Reserved
>                       Ext: 1  Coding: 0   Number Specified   Channel Type:
3
>                       Ext: 1  Channel: 1 ]
> [1e 02 80 83]I>
> Progress Indicator (len= 4) [ Ext: 1  Coding: CCITT (ITU) standard (0) 0:
0   Location: User (0) 
>                               Ext: 1  Progress Description: Calling
equipment is non-ISDN. (3) ]
> [28 09 b1 52 65 63 70 74 69 6f 6e]
> Display (len= 9) Charset: 31 [ Recption ]
> [6c 06 41 80 33 32 35 31] 
> Calling Number (len= 8) [ Ext: 0  TON: Subscriber Number (4)  NPI:
ISDN/Telephony Numbering Plan (E.164/E.163) (1)
>                           Presentation: Presentation permitted, user
number not screened (0) '3251' ] 
> [70 04 a1 39 31 31]
> Called Number (len= 6) [ Ext: 1  TON: National Number (2)  NPI:
ISDN/Telephony Numbering Plan (E.164/E.163) (1) '911' ]
    -- Called g2/911
< Protocol Discriminator: Q.931 (8)  len=9 
< Call Ref: len= 2 (reference 376/0x178) (Terminator)
< Message type: RELEASE COMPLETE (90)
< [08 02 82 9c]
< Cause (len= 4) [ Ext: 1  Coding: CCITT (ITU) standard (0) 0: 0   Location:
Public network serving the local user (2) 
<                  Ext: 1  Cause: Invalid number format (28), class = Normal
Event (1) ]
-- Processing IE 8 (cs0, Cause)
    -- Channel 0/1, span 2 got hangup
 


 
On 2/7/06, Mark Phillips <g7ltt at g7ltt.com <mailto:g7ltt at g7ltt.com> > wrote: 

I dunno about your provider but I know that 2 of my 3 MCI PRI circuits
have no 911 abilities. MCI tells me this is becasue I have no local 
dialing plan on them.

Mark, G7LTT/KC2ENI
Randolph, NJ
http://www.g7ltt.com <http://www.g7ltt.com> 


Michael Collins wrote:
> 911 **should** work on a PRI.  If you are getting a hangup and you don't 
> see a valid hangupcause, it might be best to get your carrier on the
> line and have them monitor the circuit while you dial 911.  They might
> be able to tell you what the problem is.
>
> 
>
> -MC
>
>
>
> ------------------------------------------------------------------------
>
> *From:* asterisk-users-bounces at lists.digium.com
<mailto:asterisk-users-bounces at lists.digium.com> 
> [mailto:asterisk-users-bounces at lists.digium.com
<mailto:asterisk-users-bounces at lists.digium.com> ] *On Behalf Of *Joe
Pukepail
> *Sent:* Tuesday, February 07, 2006 10:10 AM
> *To:* Asterisk Users Mailing List - Non-Commercial Discussion 
> *Subject:* [Asterisk-Users] 911 and ISDN PRI
>
>
>
> Does asterisk support this?  I have a location that I planned to only
> put a PRI line, but testing 911 (I called them first), I just get a 
> hangup.  Does 911 normally work over a PRI line?  Anything special I
> have to setup in asterisk?
>
>
> ------------------------------------------------------------------------
>
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