[cisco-voip] Poor Receiving Audio on 69xx, CUCM 8.5.1

[Anthony Kouloglou]

Hi all,
in a CUCM 8.5 i have several 69xx and 79xx at a remote site.
The HQ has a cluster of 2 CUCMs 8.5.1
There is 30ms RTT between HQ and remote site and data packet loss.
Though, all 69xx at the remote site have very poor audio either with 
g711, g729 or iLBC!!
The other end at the remote site hears fine with no disruptions.
All 7911, and 7961 at the remote site have very good reception of g729 
or g711.
Could the 69XX be such a bad product?

BTW, they run the latest firmware.

BR
Anthony