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laforge, 02/20/2022 02:56 PM
Livingston Portmaster 3¶
laforge bought two Livingston Portmaster 3 PM3A-1E, which are RAS (Remote Access Server) that- terminates one 1E line (30 B-channels)
- provides ISDN dial-up on those channels
- provides DSP based modems in case analog modem calls should be handled.
More details to follow.
Documentation¶
- portmaster3_hardware_installation.pdf
- portmaster3_configuration.pdf
- more below (Attachments)
Electronics / Pictures¶
Spare Parts / Mods¶
Fan¶
The original fan is a Fonsan DFB0812M (DC 12V 0.1A) fan by DELTA ELECTRONICS INC. The specs seem to state 2600 RPM / 24.8 dB(A) / 29 cfm.
I found it too noisy and replaced it with a Noctua NF-A8 FLX with L.N.A (reduced to 1650 rpm / 12.9 dB(A) / 24 cfm)
Fun fact: The PM3 actually seems to have a 5V -> 12V DC/DC upconverter just for the fan - instead of simply using a 5V fan...
Power Supply¶
One of @laforge's PM3A-E1 had a broken power supply. The oroginal PSU is an ASTEC LPS1112 rated for 5V/22A output (80W convection cooled, 1120W with 30cfm forced air).
It was replaced with a Mean Well LRS-150F-5. Mechanical assembly via a custom adapter plate that was fabricated easily from a small piece of aluminium sheet metal with a few drill holes.
Configuration¶
route to different telpnet hosts based on called party number¶
Assuming one wants to use a PM3 to act as modem bamk for accessing differnt [virtualized] BBSs over telnet, the problem is how to route the inbound call to a specific telnet IP address. The non-radius stand-alone configuration of the PM3 only permits either:- automatic forwarding of all calls to one global telnet/rlogin host
- allowing the users to enter the hostname for telnet themselves
- providing a list of pre-configured telnet desinations to all users (this was used at the 36C3 retronetowrking installation, see 36C3)
However, with the Call-Check radius feature, it should be possibl to receive the called + calling identity before the call is even accepted, and the nin return provide the telnet IP/port to which the call shall be routed.
Details in- Page 4-17 of the PM3A Radius for Unix manual
- PM3A sends access-request with
- User-Name=SETUP.Calling-Station-Id/No-Call-ID
- Service-Type=Call-Check
- Called-Station-Id=SETUP.Called-Station-Id
- Radius sends response with
- Login-IP-Host pointing to IP of telnet/rlogin
- Login-Service=(Telnet,Rlogin,TCP-Clear)
- Login-TCP-Port pointing to IP of telnet/rlogin
- Service-Type=Login-User
- PM3A sends access-request with
- Page 3-4 of the PortMaster Command Line Reference
set call-check on
Updated by laforge over 2 years ago · 12 revisions