Panasonic KX-NS500 - Trunks; Avoid Multiple IP Networks

8.3 H.323 Trunks
This section explains information that is necessary for setting up a H.323 QSIG network over an IP network.
8.3.1 Avoid Multiple IP Networks
A huge degradation in speech quality will be produced when calls are made through multiple IP networks as
shown below; therefore, it is recommended that you avoid establishing a VoIP network in this fashion.
IP Network 1 IP Network 2
PSTN/
BRI QSIG, etc.
IP Network 1 IP Network 2
Installation Manual 317
8.3.1 Avoid Multiple IP Networks