Section 5: Voice (6 Points)
Both phones should be able to ring each other using the numbers supplied. Use the most efficient method of transporting the voice from R1 to R4.
Ensure that voice is still available if the main connection between R1 and R4 fails.
Make the phone on R1 also answer calls if 01962 is dialed on the R4 connected handsets; do not use number expansion to achieve this.
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