Build mixed ISDN / analog telephone network
We should build a mixed ISDN = analog telephone network that we can use to interconnect the client-side modems/TAs with the BBS-side modems/TAs.
The network should offer analog as well as digital (S0, S2M) ports.
Rather than going for an old, bulky, power-hungry and proprietary PBX like the Alcatel 4400 series used by the POC, I think we could try to use a more modern approach by using LCR with E1 and quad/octo-S0 boards for the digital side, as well as some a/b adapters, as well as SIP and associated TAs.
- S2M / PRI is needed to connect devices like Livingston PortMaster3 or other "bulk access" devices that can handle 64k ISDN asd well as [up to] V.90 analog
- S0 busses are needed for interfacing ISDN cards/TAs on BBSs and Clients
- L1oIP can be used for virtual E1 trunks between LCR instances in distributed setups
- SIP with G.711 can be used to interconnect with public SIP operators for dial-in/dial-out
- consumer-grade PBXs like ISTEC 1003/1008/media can be used for attaching analog modems
- SIP<->telephony voice gateways like Cisco VGxxx can possibly be integrated, offering 24/48/30 voice lines
The resulting network should be mounted in some portable rack/chassis so it can be transported and set up at events, as needed.