Re: [Ecrit] IETF ECRIT Design Team on Premature Call Termination

So, what, because wireless carriers refused to implement it, despite
repeated requests to do so, and wireless is now more popular, we should
strike the requirement?

PSAPs I talk to consider this a requirement.  They are VERY unhappy the
carriers do not honor the requirement, in both wireline and wireless, in the
U.S.  Canada is very unhappy about the wireless situation.  Both are adamant
that they have a REQUIREMENT for this capability.

As with any other protocol issue, there are no protocol police.  We can
define the mechanism, but implementation may or may not occur.  The PSAPs
have a requirement.  It comes from experience.  We should honor it I think.

Brian

-----Original Message-----
From: Marc Linsner [mailto:mlinsner@cisco.com] 
Sent: Tuesday, October 07, 2008 5:28 PM
To: Brian Rosen
Cc: 'ECRIT'
Subject: Re: [Ecrit] IETF ECRIT Design Team on Premature Call Termination

Brian,

On 10/7/08 1:48 PM, "Brian Rosen" <br@brianrosen.net> wrote:

> It is in use in some jurisdictions now.  Canada is an example.  It was
> deployed in the U.S., it got lost, and they mostly want it back.  It is
not
> deployed in some areas.  The requirements state that if it's not needed,
it
> doesn't stop termination, which implies some feature signaling with the
> appropriate defaults.

Remember, in the jurisdictions where this is currently deployed, it works
for only 35% of 9-1-1 calls (as 65% are from cellular).

> 
> In jurisdictions that have it deployed, I am not aware of the kind of
> problems you were imagining.  The current implementations put the call
taker
> in charge of signaling alerts.
> 
> Brian
> 
> -----Original Message-----
> From: Ted Hardie [mailto:hardie@qualcomm.com]
> Sent: Tuesday, October 07, 2008 1:15 PM
> To: Brian Rosen; 'James M. Polk'; 'Henning Schulzrinne'; 'Hannes
Tschofenig'
> Cc: 'ECRIT'
> Subject: Re: [Ecrit] IETF ECRIT Design Team on Premature Call Termination
> 
> At 7:15 AM -0700 10/7/08, Brian Rosen wrote:
>> It's manual, not automatic.
>> 
>> When the PSAP call taker decides the call is over, then call termination
>> occurs.  They release the call (with a button).  In the proposed
> mechanisms,
>> the caller cannot terminate until then.

What document contains the proposed mechanisms?

-Marc-

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