[Asterisk-Users] Restricting connection of unauthorized phones.

[Michael Stahl]

I have asterisk up and running now, and installed XLITE on 2 PC's. Both
machines (mistakenly) registered as the same user / extension.

Strangely, asterisks allows this and both phones can make calls! But,
only the first one to register can receive calls at the extensions.

1. Is this normal behavior? (Why allow 2 phones on same extension) 

2. Why is asterisk not showing the second phone when I type SIP SHOW
PEERS?  Only the first (with the same extension) shows.

3. Is there some way to make asterisk NOT allow phones to connect on an
extension already in use?

4. Is there a way to make asterisk NOT allow phones to connect that do
not have a valid extension in SIP.CONF?

Thanks,

Mike