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|CPS » Telephone Line Sharing » 232-PSS|
RS-232 PORT SELECTION SWITCH (232-PSS)
The 232-PSS is similar to common remote code activated software controlled switches that allow a caller to select up to 8 different RS-232 ports at a remote location. However, the 232-PSS provides automatic port selection along with a very high level of caller authentication and a lower cost alternative.
This unique concept is accomplished through the interaction of a unique matchbox sized hardware KEY connected to the analog side of the caller's modem and the 232-PSS. The authentication handshakes and port selection occur within one second of the receiving modem going off hook.
Inbound calls without the proper Secure Access KEY are simply aborted. There are over a billion handshake combinations that change with each call. The port selection (1-8) is made via a manual rotary switch that is also on the caller's KEY.
The authorization and setup occur very quickly; long before the modems are trained. There are no passwords or cumbersome software switching codes to enter. In fact, a PC is not even required. The subsequent data is transferred transparently; unlike software controlled switches where certain bit patterns can make the switches "burp" or even switch ports.
The KEYs are programmed from the 232-PSS (Also see Remote Programming), no PC is required. They may also be programmed selectively so that only certain KEYs allow access to certain ports, or to broadcast to all ports.
Since the 232-PSS initiates its operation on the analog side of the operative modems, the system is completely hardware and software independent. Once the automatic setup is completed, all of the asynchronous RS-232 signals are linked transparently between the modem and the DTE; except for "ring". No data rate setup is required on the 232-PSS and there is no buffering or band pass limitation. Outbound calls through the 232-PSS are also isolated and can be placed from any port transparently, or not allowed.
The 232-PSS was primarily designed for remote maintenance applications, but it can be used for any remotely controlled switching requirement or even used as a secure broadcast switch to multiple RS-232 devices, such as printers.
Maintenance ports are becoming a preferred path of entry for hackers. As the number of maintenance ports increase on commonly available hardware operating with well-documented mainstream operating systems, security is becoming an urgent issue.
The system is deceptively simple to use for the high degree of security and type of switching options that it provides.
REMOTE PROGRAMMING (Programmer Required)
Also see the Modem Router Switch (MRS). It provides a similar function to the 232-PSS, except that the switched ports are analog modem ports and not RS-232 ports.
RS-232 PORT SELECTION SWITCH (232-PSS) Security Selection Key Also Required Item No SWT232-8 Price Contact Bomara Physical 7.5" W x 4.25" D x .75" H, 1 lb. Connectors (2) RJ-11 TelCo/Programming, (8) RJ-45 RS-232, (1) DB-9 Male RS-232 LEDs (12) Power, Mode, Key Program Switches (1) Manual Rotary 8 Position, (1) 4-Bit Dip, (1) Pushbutton Bell None Cable (1) 5' RJ-11 Phone Cable, (1) 6' DB-9 Female to DB-9 Male Adaptor None AC Power Wall Mount 9VAC 1A, 115V/60Hz NOTE: For 220V/50Hz, add (-INT) to the Item No SECURITY SELECTION KEYS Item No SECRS-8 Quantity 1-5 6-10 11-25 26-50 Price each Contact Bomara Physical 1.5" W x 3" D x .75" H, .25 lbs. Connectors (2) RJ-11 TelCo LEDs (1) Verify Connection Switches (1) Manual 8 Position Rotary Bell None Cable (1) 15" RJ-11 Phone Cable Adaptor None AC Power None ADDITIONAL RS-232 PORT ADAPTORS RJ-45 to DB-25 Female RS-232 Item No CA5R45-F Price Contact Bomara RJ-45 to DB-9 Female RS-232 Item No CA9R45-F Price Contact Bomara Physical 2" W x 1.75" D x .5" H, .25 lbs. Connectors (1) RJ-45 RS-232, (1) DB-25 or DB-9 LEDs None Switches None Bell None Cable None Adaptor None AC Power None 232-PSS REMOTE PROGRAMMER Item No PSS-232-P Price Contact Bomara Physical 1.5" W x 3" D x .75" H, .25 lbs. Connectors (2) RJ-11 TelCo LEDs (1) Programming Switches (1) 4-Bit Dip Bell None Cable (1) 15" RJ-11 Phone Cable Adaptor None AC Power None