Maureen,

I think what was talked about is that the H.450.x specification have fault detection built-in. As an example, messages are timed when waiting for a response. Also, irrevocable actions usually wait for a confirmation of success with a fall back on failure.

In that features have a finite life, there is minimal need for long term recovery.

I hope that this helps.

Bob

------------------------------------------------------------------ Robert Callaghan Siemens Information and Communication Networks Tel: +1.561.997.3756 Fax: +1.561.997.3403 Email: Robert.Callaghan@ICN.Siemens.com ------------------------------------------------------------------

-----Original Message----- From: Maureen.Stillman@nokia.com [mailto:Maureen.Stillman@nokia.com] Sent: Monday, April 10, 2000 2:02 PM To: Robert Callaghan Subject: [Robustness] mechansims for H.450

Bob,

At our last robustness teleconference, we recalled your discussion in Geneva of reliability mechanisms built into the protocol for H.450, but couldn't remember the details. Could you post a high level summary to the SG-16 mailing list of H.450 reliability mechanisms?

Thanks.

-- maureen

Maureen Stillman Member of Scientific Staff Voice: (607)273-0724 x62 IP Voice Networks Fax: (607)275-3610 127 W. State Street Mobile: (607)227-2933 Ithaca, NY 14850 e-mail: maureen.stillman@nokia.com www.nokia.com