SIP phone w/AsteriskNow cannot dial out to PSTN

Can anyone please assist?

I have a Polycom IP 330 SIP phone with AsteriskNow that cannot dial out to the PSTN (but an analog FXS-attached phone can).

The SIP phone can dial and receive calls to/from other extensions and voicemail works fine.

The SIP phone is registered and is using the same dial plan as the analog phone.

This is a new installation so it’s definitely a configuration issue.

When I run a sip debug on the AsteriskNow console during attempts from the SIP phone I get no output when dialing an outside number, however when I setup a call to another from the SIP phone extension I do get output on the sip debug.

Any ideas?

TIA- Bill