Yealink Forums

Hi.

I bought a VP530 and try to make H264 calls. I tested in acrobits softphone (via iPhone) and the grand stream GVX3601 IP CAM.

The acrobits made video calls with VP530 by using H263. The IP cam only works with H264, so no video is shown.

Firmware: 23.70.0.63
May I update the firmware to 23.70.248.202-UC.rom?

I attached the pcap file. I saw H264 packages but with it cannot make it?

I think it should be a bug. The server request H263 and phone feed back with H264 firstly. Please ask your distributor for help and they can help to submit to the corresponding technical specialist.
This will help your issue be solved quickly.