[asterisk-users] Intercom with Snom phones

[Zaheer Master]

I am currently waiting on a SIP Trunk to be set up for my company. In the
mean time, can I setup my phones on asterisk server so I can try the
intercom function? I'd just like to be able to talk on the local network to
test the sound quality. 

I've added this to my extensions.conf:
[101]
  type=friend
  context=phones
  host=dynamic
  secret=1234

*For both [101] and [102]

And this to my sip.conf:
[101]
  callerid="Zaheer Master" <5168224466>
  type=friend
  nat=yes
  secret=1234
  context=default
  host=dynamic
  qualify=yes

Am I missing something else? Thanks in advance for the help!

Regards,
Zaheer