VOIP Troubleshooting Issue

edit

Having issues with VOIP call quality at one of my offices. I decided to take a simultaneous capture of outgoing/incoming RTP traffic between two of my offices. One of them has no issues with VOIP quality, and the other one does. I setup a port mirror at both sites before initiating the captures. The call sounded acceptable at both ends, but the Wireshark captures don't seem to match up.

Office #1 (no VOIP issues at this location):
RTP Packets Sent: 20,903
RTP Packets Received: 20,896
Timestamp Start: 16:27:36
Timestamp End: 16:34:34
Display Filters:
Outgoing Packets:
(ip.src == 192.168.7.30 && ip.dst == XXX.XXX.XXX.XXX) && (udp.port eq 2246 and udp.port eq 15286)

Incoming Packets:
(ip.src == XXX.XXX.XXX.XXX && ip.dst == 192.168.7.30) && (udp.port eq 2246 and udp.port eq 15286)

Office #2 (VOIP call quality issues at this location):
RTP Packets Sent: 9,533
RTP Packets Received: 9,517
Timestamp start: 16:27:31
Timestamp End: 16:33:53
Display Filters: 
Outgoing Packets:
(ip.src == 192.168.5.13 && ip.dst == XXX.XXX.XXX.XXX) && (udp.port eq 10066 and udp.port eq 10536)

Incoming Packets:
(ip.src == XXX.XXX.XXX.XXX && ip.dst == 192.168.5.13) && (udp.port eq 10066 and udp.port eq 10536)

Anything I'm missing here?