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.oO Phrack 50 Oo.
Volume Seven, Issue Fifty
14 of 16
//===============================\\
|| The DCO-CS Operating System ||
|| -*- ||
|| ||
|| by Trunkin' Fool AKA mrnobody ||
|| 4.1.97 ||
\\===============================//
OK... this is the first part of what (hopefully) will be a little
series type thing of articles on the DCO operating system, which is from
Siemens. DCO is run on an LLS/RLS-1000/RLS-4000 machine. It has
psychotically mad logging, but the logs are configurable from the admin
accounts. The DCO box I was using just happened to only have a 1200 bps
dialup, so some operations (i.e. listing INWATS trunks and what they route
to) were painfully slow considering the large amount of trunks this thing
can control. It is similar to a 4ESS in some ways, and offers some PABX
functions. A guy can have lots of fun with one of these things...
Some features/specifications:
Billing Computer Interface
--------------------------
"The DCO-CS collects AMA data and provides direct data interface with
your business computer, as well as 1600 BPI magnetic tape backup
or primary data collector"
International Callback
----------------------
"Allows the system to place a return call to an international
subscriber for the dialed domestic number originally called, either
through a live or automated operator position."
ISDN Transport
--------------
The DCO-CS is capable of switching 64 Kb/s data. This allows people
(customers, hehe) to switch Primary and Basic Rate ISDN traffic.
LEC Services
------------
Full LEC services are offered, including POTS (duh), Centrex &
Enhanced Centrex (combines ISDN & POTS lines in the same Centrex
groups, direct inward dialing, call forwarding, hold, call transfer,
intercom, conferencing, OUTWATS over line groups of any size.), CLASS
including calling number delivery and display, selective call blocking
and forwarding, automatic recall and call trace.
"Hacker intrusion is detected and 'thwarted' by sophisticated pattern
recognition software. The DCO-CS switch lets you detect abused authorization
codes and service-denied authorization codes and automatically route the
calls to your service departments. The system also offers timed threshold
levels for both ANI and authorization codes as another form of fraud
protection. It delivers detailed traffic and facilities usage reports to help
you plan the optimum use of your private and leased facilities."
--Siemens Stromberg-Carlson
Calls are processed simultaneously with separate processors and
switching matrices. In the event of a failure, not even calls in the process
of being switched are lost because when the failure occurs, the system simply
switches to "its redundant processor and memory".
I guess that before I dive straight into the commands, I should
discuss something pretty damn important. That something is MMI. MMI
stands for Man-Machine-Interface,and is basically the 'shell' for this
system. First off, in MMI, every command is prefixed by a '