The short answer is yes Softphone and IPC will both set the IP DSCP vlaues for RTP packets leaving the PC. It is possible that your switches are configured to not trust the packets leaving the PC and thus the DSCP is being set to 0.
The IP QoS SRND discusses switch qos configuration with untrusted endpoints and softphone. Check out page 2-8 in the pdf at
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...