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Apr 23, 2012 at 15:40 comment added Chris S Mod The phone companies networks as they related to business WANs would be On-Topic. But Yeah, the internal operation of a PSTN network is Off-Topic and very niche.
Apr 23, 2012 at 15:26 comment added voretaq7 Mod I agree that telephony as defined in that proposal (PBX/PABX/IP PBX/VoIP/ToIP) is on-topic here, though old PBX/PABX systems would be pretty legacy in any environment at this point and you'd be unlikely to find anyone with much experience with a specific unit. I'd go one step further though and say that "circuit-switched telephony" is only peripherally on-topic (it's a very niche area), and operations of the phone companies' networks would be off-topic...
Apr 23, 2012 at 14:32 history edited Chris SMod CC BY-SA 3.0
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Apr 23, 2012 at 14:05 history answered Chris SMod CC BY-SA 3.0