Dialup Network In A Box » History » Revision 4
Revision 3 (laforge, 01/01/2020 02:46 PM) → Revision 4/13 (laforge, 01/01/2020 02:46 PM)
{{>toc}} h1. Dialup Network In A Box This is a self-contained, portable telephony network which allows us to connect and analog modems and ISDN adapters at retrocomputing events. The setup (as of Q4/2019) consists of: * [[Auerswald COMmander Basic2]] PBX with 8x S0 (ISDN BRI) ports, 16x a/b (analog) ports, 8x Up0 (ISDN) ports and 1x S2M (E1 ISDN PRI) * 1U Rack-Mount Atom PC with 4-port E1 (DAHDI) card and FreeSwitch: Emulates public telephone exchange * [[Livingston Portmaster 3]] RAS with ability to terminate 30 ISDN or analog modem calls h2. Telephony Setup The physical setup looks like this: {{graphviz_link() digraph G{ rankdir = LR; CB2 [label="Auerswald\nCommander Basic2"]; PM3 [label="Livingston\nPortmaster 3"]; ISDNTA1 [label="ISDN TA"]; ISDNTA2 [label="ISDN TA"]; ISDNTAN [label="ISDN TA"]; Modem1 -> CB2 [label="Analog Line"]; Modem2 -> CB2 [label="Analog Line"]; ModemN -> CB2 [label="Analog Line"]; ISDNTA1 -> CB2 [label="ISDN BRI (S0) Line"]; ISDNTA2 -> CB2 [label="ISDN BRI (S0) Line"]; ISDNTAN -> CB2 [label="ISDN BRI (S0) Line"]; CB2 -> FreeSWITCH [label="ISDN PRI (E1) Trunk"]; FreeSWITCH -> PM3 [label="ISDN PRI (E1) Trunk"]; } }} h2. Logical Setup: This shows the logical setup including PCs and associated software: {{graphviz_link() digraph G{ rankdir = LR; PC1 [label="DOS PC 1"]; PC2 [label="DOS PC 2"]; CB2 [label="Auerswald\nCommander Basic2"]; PM3 [label="Livingston\nPortmaster 3"]; ISDNTA1 [label="ISDN TA"]; TERM1 [label="Terminal Program"]; TERM2 [label="Terminal Program"]; subgraph cluster_client1 { label="Dialup User 1"; TERM1 -> PC1; PC1 -> Modem1 [label="RS232"]; } subgraph cluster_client2 { label="Dialup User 2"; TERM2 -> PC2; PC2 -> ISDNTA1 [label="RS232"]; } Modem1 -> CB2 [label="Analog Line"]; ISDNTA1 -> CB2 [label="ISDN BRI (S0) Line"]; CB2 -> FreeSWITCH [label="ISDN PRI (E1) Trunk"]; FreeSWITCH -> PM3 [label="ISDN PRI (E1) Trunk"]; PM3 -> BBS [label="telnet"]; } }} h2. Pictures !dalup-in-a-box.jpg! !commander_basic2.jpg! !comander_basic2.jpg!