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- Infomation on the TXEx exchange based processors.
- typed by iNFERNO
-
-
- The TXE series of switches are widely used in English phone system. They
- are a step down from the digital switches (TXD, AXE10, UXD5 etc..), being
- electronic (and not fully digital). A TXE is controlled by its exchange
- based processor which is an ICL DRS300 level 70 microcomputer running UNIX.
- What you must remember is that it doesn`t handle the calls for the resident
- area, the switch itself does that but it does control the switch and isthe
- main interface between man and computer.
-
- The E.B.P is connected to both the PSTN (Public Switched Telephone Network,
- the one you use) and the PSN (Packet Switched Network). General
- communication between the EBC and external computers is made using the PSN,
- but when this is unavailable the PSTN is used. For this reason, if you do
- some scanning of TXE exchanges you will probarbly come across it after some
- time (but thats a LOT of time scanning!!). Inside the actual exchange it`s
- connected to a micro-LAN (Local Area Network) from whichthe terminals in
- the exchange can access it - if the user has full account details.
-
- All the EBPs in an area are connected to a Central Site Processor which
- handles up to thirty other EBPs, which communicate as `nodes` on an X.25
- network (the PSN as mentioned before).
-
- Being a typical UNIX system, when logging on the `Login` prompt will show
- and the user will have to identify himself (or herself??). Again, some
- users may be presented with the UNIX shell prompt instead.
-
- It users a COMFORTE menu system (COMputers FOR Telephone Exchanges) which
- displays all the options on screen (i`m not too sure how this is handled
- remotely, but it is simular i think).
-
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