[cisco-voip] DIDs / ELINs for use in CER ?

[Scott Voll]

Good to know because I've dealt with the same issues.

I just thought I had to add the PS-ALI / PSAP contract to get it fixed.
Guess I'll work on that.

Thanks

Scott


On 8/30/07, Ted Nugent <tednugent69 at yahoo.com> wrote:
>
>
> If the provider is sending the BTN to the PSAP they
> need to fix that, that's NOT how it's supposed to
> work. However you are right 90% of the installs that
> I've have done have run into this problem but its
> usually resolved with a call to the provider telling
> them to honor the calling number sent to them.
>
> And actually it would be a problem with passing
> location info especially if you were working in a
> multi-building or multisite environment because your
> ERLs and ELINS are tied together in the PSAP ALI DB.
> If the BTN is being sent as opposed to the actual ELIN
> then emergency personnel would always be sent to the
> bill to address even if the ERL is in another building
> 2 blocks over on the second floor. So you absolutely
> need to get that fixed for CER to work correctly.
>
>
> --- Dark Fiber <d4rkf1ber at gmail.com> wrote:
>
> > I am getting a bit confused about something
> > regarding the use of DIDs in CER.
> >
> > The documents basically state that you need to get
> > some DID's from the
> > service provider for each ERL you plan to define,
> > these DID's will be
> > used as ELINs to both identify the location and for
> > the PSAP to return
> > the call if need be.
> >
> > So a 911 call is placed, and once things are setup
> > CER will basically
> > do or have CM do a translation of the users
> > extension to one of these
> > DIDs you specify so that the service provider  will
> > know what PSAP
> > that call needs to get routed to and so the PSAP
> > will have a number to
> > call back on and such.
> >
> > All sounds fine and dandy I guess.
> >
> > However, my experience (which isn't much) has led me
> > to think that
> > usually when dealing with  DID ranges from a service
> > provider that on
> > 911 calls the service provider does not usually pass
> > the DID of the
> > phone to the PSAP but rather the billing number
> > which is usually the
> > first number of the range I thought?
> >
> > This isn't a problem as far as passing the location,
> > but it would be a
> > problem for a return call from the PSAP.  CER would
> > be looking for a
> > call coming into one number which would be mapped to
> > the phone which
> > called 911, however if the billing number was passed
> > to the PSAP thats
> > the number that would be called back.
> >
> > Hopefully I am just blanking on something here and
> > this is not the case.
> >
> > Can anyone enlighten me on what I am missing here?
> > Thanks!
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> >
>
>
>
>
>
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