1. IP PHONEA registers to IPX-1980-A as extension 601.
2. IP PHONEB registers to IPX-1980-B as extension 801.
3. All the extensions under IPX-1980-A are in the format 6XX.
4. All the extensions under IPX-1980-B are in the format 8XX
5. Extensions under IPX-1980-A can make calls to extension under IPX-1980-B with format
8XX.
6. Extensions under IPX-1980-B can make calls to extension underIPX-1980-A with format
6XX.
Step 1:
Set up a peer 699 in IPX-1980-A
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