[Asterisk-Users] Aastra 9331i phones

[Matt]

Hi,
I just purchased a 9331i phone.  It's great!  However, having a slight
issue with line 2 and 3.  line 1 works fine.

But when I try to make a call with line 2 or 3 I get a fast busy from the phone.

Asterisk shows this:

Mar 23 15:19:12 NOTICE[18185] chan_sip.c: Failed to authenticate user
No User <sip:No%20User at mysipserver.myhost.com:5060>;tag=34c1cd2bf55cb8d


Can anyone with a 9331i comment on this?   What do I need to do to get
line 2 and 3 to authenticate outgoing?