[Serusers] re: SIP 100 trying

[Yair Hakak]

hi,
 for some reason recently when i try to make calls using a SIP
endpoint (passing them along to asterisk) i get a SIP 100 message
("trying-your call is important to us") instead of the call being
passed on. The endpoint is registering with SER (according to serctl).
I can't find any documentation on this - i think it's because the nat
configuration is screwed up on the endpoint.

What does this message mean? anyone have any links or pointers?

apologies for the basic question,
 yair