Are there any settings (inbound, outbound etc.) or anywhere else that could keep the extensions in network from calling each other. most everything else works. I have a Grandstream ucm6204 PBX, 2 analog phone lines (copper) and a few Grandstream 1760 and 1780 phones and a Panasonic wireless Hub and 4 wireless phones. all hooked up to the same cat5e network . all network connections are 1gig except the 1760 phones and wireless hub. all switches and router are 1 gig. found corrupted phone log files and deleted them. upgraded bios from 1.0.18 to 220.127.116.11.didn’t help . extension permission are all the same and outbound rules has same permissions. could it be some kind of nat setting? It was all working before with same hardware. restored from older backup, that did not change anything. Just wondering if some hidden setting could have changed to no let phones talk to themselves. If anyone has any ideas please let me know. I put in a ticket with grandstream but its been over 24 hours and not a work. I will be thankful for any suggestions . Does anyone know if there is a grandstream rep in St. Louis ,mo. please let me know. Thank you all. Pancho
P.S. all phones, pbx, and router all use static ips.