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QSIG QSIG QSIG 1) User @201 has calls Frame Relay forwarded to User @401 QSIG QSIG 1) User @201 calls Frame Relay User @401, No Answer QSIG...
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QSIG 2) User @101 tries to make call to User @101 3) PB @101 sends back busy indication 4) PBX @410 "camps on" User @101 using "D" Channel Only Messages 5) PBX @401 places call when User @101 is free QSIG Frame Relay QSIG...
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