Hi,

The iPhone client, when it goes into background, can only respond to incoming messages.

That makes the Registration expire when there is no communication from the server before

the expire time. I could make the Registration not expire at all. Not sure it's the only option.

Is there a way to send a Ping message from server periodically to the iPhone SIP client. This

will wakeup the SIP client and resend REGISTER message.

Thanks

Krish Kura