Is there only a single IP network between 2 ends of a call?
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/
PRI QSIG, etc.
IP Network 1 IP Network 2
Document Version 2010-08 IP Networking Guide 19
2.1.2 Network Configuration
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