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- 5ESS-2OOO Compact Exchange Units.
- by hybr1d (http://hybrid.dtmf.org)
-
-
- o Introduction
- o Types of compact exchanges
- o CDX exchange
- o VCDX exchange
- o Conclusion
-
-
- Introduction
- ------------
-
- This is a very compact file, designed to be an intorduction, or primer to
- 5ESS local compact digital exchange units. I am wrtting this off the top of
- my head, so don't expect it to be very complex in technical nature. For
- starters I'll explain a little about the new 5ESS switches and there
- functions. We've all heard of the millenium bug, and it's supposid ability to
- take out massive networks etc. Well Lucent technologys, Bellcore (now
- telecord communications or somthing), aswell as lata exchange carrier
- providers such as MCI, AT&T, Sprint, and all the RBOC's such as SWBell, etc,
- all got a bit paranoid and decided to enhance to current 5ESS switching
- configurations to a new architecture they feel would be compatable with the
- millenium software and network problems. The new 5ESS-2OOO switches are all
- basically the same as conventional 5ESS switches, except the software parts,
- such as the administration control software platforms, and global title
- translation software etc, have been upgraded to be Y2K compatable. As well
- as this, the new 5ESS switches have been modified (based upon conventional
- 5ESS) to be easily upgraded in the future with new modules for future
- telecommunications developments. In other words, the new digital switches are
- very very very souped-up versions of 5ESS, infact, I would concider them to
- be one of the most versatile switches around. Now the deal with these new
- digital switching systems is that they can handle more and more lines, more
- network traffic, aswell as a very upgraded ability for general system
- capacity. They have also been upgraded with new security features to stop
- people like me from gaining access to the local administration part which
- is accessable via x25, the PSTN, and the net (on a 'secret' IP range).. I'm
- not going to go into that at the moment, thats another file.. Anyways, as I
- was saying, the new 5ESS-2OOO digital exchanges are like souped up 5ESS
- switches. Before there where people bitching about how they can get 'traced'
- messing around on the phone network because 5ESS logs shit. Well, I got news
- for you, 99.9% of all worldwide switching mechanisms, electro-mechanical, or
- digital derived, ALL log stuff, and always have done. It's just with these
- new 5ESS-2OOO digital exchanges, its more obvious if you are messing around.
- Lets say for example you where scanning over 400 numbers a night via your
- land line.. Normaly a 5ESS, DMS, TXE etc would just log your line usuage,
- calling patterns etc into a subscriber log in one of the switches sub-system
- parts. You would only usually get discovered if one of the field technitions,
- glanced at the data for you line usuage. Thats ok, because we all no that
- exchange field operators are lame and lazy, but what about this new 5ESS-
- 2OOO line loging equipment? - welp, I have bad news for you. If you scan
- in continuous, or repetitive cycles over your subscriber loop, the chances
- are, you're gonna get your haxoring ass taken to court by your RBOC, or
- whatever provider you are with. The reason for this is that 5ESS-2OOO
- digital switches continously monitor the activity, and network usuage of over
- 100,000 lines similtaniously. Instead of loging line status etc into a
- dormant log file in a sub-system, if one of the local switches notices that
- somthings up, a field adminstrator is notified imediatly, probably by the
- means of a status bar on an uplinked terminal. The new switches have been
- modified to be very stringent on system capacity and usuage patterns, and
- will notify any field office engineer of the slightest problem. The new 5ESS-
- 2OOO switches are basically like UK monologs, in other words, they record
- everything about your line, all digits dialed, even after terminating
- destination point, they even log the time intervals between each tone you
- dial/emit. Basically they are the big-bro of the phone system so start
- getting paranoid. (I know for a fact, that it is possible to log onto one of
- the local exchange units and turn line logging OFF, and even make your line
- appear to be non-existant). Anhow, I think I've probably made a few people a
- little paranoid now, on with the rest of the file.
-
- Types of local compact digital exchanges
- ----------------------------------------
-
- Werd, well now its time for the focus of the file. I'm not writting a mad
- big file on the entire 5ESS-2OOO network because it would take _ages_, so
- I'm going to focus on local compact excahnges designed for the rurual
- community such as college campuses and areas with not many subscribers, like
- suberban areas of towns. There are 2 main types of compact 5ESS-2OOO local
- switch, the CDX (Compact Digital eXchange), and the VCDX (Very Compact
- Digital eXchange). Both these new units are designed to be very echonimacal
- for the money raking telcos. The idea is that these switches are being placed
- in new suberban housing developments, and are being integrated into the PSTN
- as we speak. The CDX digital exchange for example is designed to be very
- snall, handeling small local phone networks, it can however be upgraed with
- the implementation of modules, kind of like plug'n'play, until the switch
- becomes a fully fledged 5ESS-2OOO unit if required in the future. Lets take
- a look at these local networks in more detail.
-
- The CDX digital exchange
- ------------------------
-
- The CDX (Compact Digital eXchange) is a small sized siwtch configuration,
- which is capable of providing the same services to subscribers the same as
- a conventional 5ESS switch would. Unlike the older rural exchange units,
- these new switches are capable of handeling more advanced telecommunications
- services like wideband data transmission, and video data etc. The switch is
- housed in a cabinet that is 6 foot high, 29.9 inches wide, and 23.6 inches
- deep. The switch is desinged to be a stand alone unit and as I said before,
- very capable of handeling current/future telecommunications developments and
- serverices such as POTS lines (Plain Old Telephone Service), equal access
- services, ISDN (Integrated Services Digital Network), CENTREX services such
- as call waiting, hold, etc etc. The system is also designed to be fully
- compatable with the Signaling System 7 telephony protocol which has been
- implemented over the majourity of the international PSTN. The switch can
- handle from 100 subscriber loops, upto 15,000 local access lines or 15,000
- remote access lines. CDX operates on the same software as the conventional
- 5ESS-2OOO switch, and also has the same call routing architecture (physical).
-
-
- ______________________ Admin Console AM: Adminstration Module
- | | ______ CM2: Communications Module
- | | | | CM2C: " Compact
- | 3B21D |-------| | MSDT: SLC-2OOO Multi -
- | | |______| Services Remote
- |______________________| Module
- |
- |
- | _________________
- | | |
- _______|_______ | SM or |--|
- | | | SM-2OOO |--|
- | CM2C |-----------| |--| (upto 6 RSM
- |_______________| | |--| outputs)
- | | |--|
- / |_________________|
- / |
- / |
- _______|_______ ______|______ _________
- | | | | | |
- | ORM | | |--------| local |
- |_______________| |_____________| |_________|
- | | | |
- ORM: Remote Module
- RSM: Remote Switching Module
- SLC: Subscriber Loop Carrier
- SM: Switching Module
-
- The VCDX digital exchange
- -------------------------
-
- VCDX stands for (VERY Compact Digital eXchange), and when I say compact, I
- mean compact. It is the smallest of all 5ESS-2OOO switch configurations but
- is still very capable of providing the same services as its bigger bro, the
- CDX switch. This switch is used by CATV, CAPS, small towns, and government
- facilitys. The switch is also capable of providing Central Office services
- such as the usual call waiting, and ISDN. The intersting thing about this
- switch is that it supports Carrier Identification Code (CIC) expansion and
- is compatable with changing NPA's in the Interchangable Numbering Plan Area,
- as required by reglatory bodys such as the FCC.
-
- The VCDX switch can support various configurations using a single 5ESS
- Switching Module (SM) to handle the call processing. The SM is controlled by
- a sophisticated UNIX software-based workstation which provides administrative
- and maintenance capabilities. A mimimum configuration of 2 cabinets that are
- 6 foot high x 29.9 inches wide x 23.6 inches deep in size is necessary and
- thus it fits in a small space. If left in standard mode, the VCDX can handle
- upto 1,500 lines. If the SM-2OOO unit is impemented as a module, the switch
- can handle as many as 14,000 lines.
-
- _____________ _______
- | | | |
- | workstation |----------------| modem |
- |_____________| |_______|
- |
- |
- |
- __________|___________
- _____________ | |--|
- | | | |--|
- | local dist |-------------| SM or SM-2OOO |--|
- |_____________| | |--|
- | | | | | |______________________|--|
-
- (to local distrobution plant. then to subscriber loops.)
-
- Conclusion
- ----------
-
- Welp, thats it for this short file/article. Hope you enjoyed it. As you can
- see the 5ESS lcoal unit range is very complex, and is a massive improvement
- on previous local switching networks. Just be carefull about the subscriber
- loop monitoring modules. If you'd like more info on 5ESS-2OOO switching, I
- have put some decent information up on my website for your enjoyment and
- viewing pleasure. Goto http://www.dtmf.org/hybrid and check it out, you'll
- also be able to find the other 30+ files I've written in the past on there
- aswell, so go there now@! thats an order, heh. Anyways, thats it, peace.
-
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