module doesn't populate extensions dropdown when adding a line to a phone in FreePBX 14.
The issue seems to be that the SQL in functions.inc.php/polycomphones_dropdown_lines only selects devices/users of "tech" type "sip". FreePBX 14 encourages you to use pjsip as the default. updating the SQL as follows fixes this issue.
$results = sql("SELECT devices.id, devices.description, users.extension, users.name FROM devices
LEFT OUTER JOIN users on devices.user = users.extension
WHERE tech = 'sip' ORDER BY devices.id",'getAll',DB_FETCHMODE_ASSOC);
$results = sql("SELECT devices.id, devices.description, users.extension, users.name FROM devices
LEFT OUTER JOIN users on devices.user = users.extension
WHERE tech IN ('sip','pjsip') ORDER BY devices.id",'getAll',DB_FETCHMODE_ASSOC);
I'd make a pull request, but I'm in the middle of rebuilding a pbx that has to go live in a few hours and do not have the time right now.
I will update this issue if i find any side effects or other incompatibilities.