
376 Chapter 43 VoIP trunk gateways
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Figure 115 Setting up routes and fallback for call to remote system (CDP dialing code)
UDP network: The user dials 2233 (remote system DN: 2233; destination digits/private access
code: 555). The system then adds the private access code to the dialout digits.
If the call falls back to PSTN line, the system then dials out the private access code (private
network PSTN line) or public access number (public PSTN) to the remote system in front of the
2233.
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