1. Capture packets on the VCN3010 platform and Hikvision platform to check whether the device code of the peer device complies with the specifications. The camera code pushed by the peer device is a 20-digit code, and the 11th to 13th digits are 131.
2. Check whether the directory subscription message call-ID is the same as the directory subscription notification message call-ID sent by the peer end. The call-IDs are different, and therefore the VCN3010 platform rejects the directory subscription notification message.
Directory subscription message sent from the VCN3010 platform:
Directory subscription notification message sent from the Hikvision platform
3. Upgrade the device on the Hikvision platform.