I have a linksys EA7300 router, Arris SB6190 cable modem and the Grandstream HT801 ATA. For some reason I cannot call out. I do not have a PBX I’m connecting the HT801 directly to the Flowroute SIP.
Flowroute Said: It is also possible that if your workstation phone is using a different codec than you are sending out the trunk the PBX could be transcoding and any CPU latency could also cause audio issue. It is recommended to disallow your workstation phones from using anything except G.711 The choppy audio could also be related to anything that could cause packet loss or latency. Flowroute uses direct media so no RTP touches our equipment it goes from your PBX to the PSTN.