Why is video sometimes dropped between a Polycom MGC and a IP VCR or MCU during a call?
If you have both H.263 and H.264 enabled on the MCU or IP VCR - and Video transmit size optimization set to Dynamic codec and resolution - when the MCU or IP VCR attempts to change codec this causes the Polycom MGC to drop video and report a connection state of secondary.
To resolve this problem, on the MCU go to Settings > Connections and on the IP VCR go to Settings > Connections, then set Video transmit size optimization to Dynamic resolution only.
This article applies to the following products:
- Cisco TelePresence IP VCR 2200 / MSE VCR blade
- Cisco TelePresence MCU 4200 / MSE 8420
- Cisco TelePresence MCU 4500
- Cisco TelePresence MSE 8510 blade
|April 13th, 2011||TAA_KB_51|