I have set up a VoIP network with 60 Grandstream GXV 3000 (FW 18.104.22.168) video phones and Asterisk 1.4.11 running on IBM x346 server (3.4 GHz Xeon, 4 Gb RAM, 2 76Gb SCSI HDD’s in RAID 1 array) with Sangoma A101 E1 card. The installation of the software, interface card and configuration of Asterisk all seem to have gone smooth. But I keep getting these errors when I try to establish a call :
NOTICE: rtp.c:1279 ast_rtp_read: Unknown RTP codec 126received from 'xx.x.x.xxx’
I’m getting 3 of these for both the caller and the callee side. This results in losing either audio or video or sometimes droping of the call. What is the cause of this and how can I get it working like it should?
P.S. I did also do a network trace with Wireshark so I can post it if it’s needed.
THX in advance!