I have a remote site that is having voice quality issues. They have a T1 connection that has QoS concfigured to give priority to the voice traffic and shape the data traffic to 768k.
Is it necessary to have QoS configured on the trunked ethernet port that connects to the switch?
The port on the router is currently configured to remark dscp/cos markings on the packets, but no priority.
Could this be causing the voice quality issues?