Extension Dialing Not Working on Sangoma P-Series

This FreePBX 16, Asterisk 18 instance has been running for close to a year and a half with little issue. I have around 50 P-series phones of differing models deployed in this environment. I’ve recently received a report of users having issues with direct extension dialing. They can make external outbound calls, or receive external inbound calls, but they cannot simply dial from extension to extension. I did recently update to the latest 1.73 firmware package for D & P Series which includes firmware version 4_18_1 for the P-series phones.
Any ideas? Could it be something with the firmware update? Thank you for your help!

This topic was automatically closed 31 days after the last reply. New replies are no longer allowed.