[Freeswitch-users] Calling an extension on a remote freeswitch box

[Yungwei Chen]

Hi,

I'm trying to place a call to an extension on a remote freeswitch box. 
I tried the following command, but it doesn't work. 
originate {ignore_early_media=true}sofia/internal/77777 at 192.168.1.20 test

Here's the error message.
2011-07-05 18:06:46.670942 [ERR] sofia_reg.c:1912 Cannot locate any authentication credentials to complete an authentication request for realm '"192.168.1.18"'

Am I using the right dial string? If so, how can I fix the error? Thanks.