I can't get my new Grandstream GXP1400 to authenticate on the network. Anyone have a Grandstream phone tell me what fields they filled in for the SIP account to get it to work with Voipo? I've tried various combinations without any luck.

Also, which codecs should be on and off?

Any other suggestions to make this work?

Thanks

DavidScreen Shot 2013-09-20 at 6.32.06 AM.jpg