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register is overwritten with the CSDC CCOL. The CSDC office then sends a bit
down the line to tell the equipment that a CSDC call is being processed.
The call is now reinitialized to appear as though no digits have been
collected. Digit collection proceeds until the proper number of digits (7 to
10) has been received. An AMA register is seized at the end of the dialing.
The call is then routed according to the dialed digits on a CSDC outgoing
trunk. Answer guard timing for CSDC calls is 800 ms. Upon answer, the answer
time is recorded in the AMA register.
An outpulsing trunk is seized and a POB is hunted. If an outgoing trunk
and outpulsing device are needed, one will be hunted. Information on the trunk
is stored and a transfer to the outpulsing routine (MF or CCIS) is done. A
verification insures that both calling and called parties are CSDC allowed. If
they are not, the call is routed to an Automatic Intercept Service (AIS).
For MF outpulsing, a junior register is seized, the outgoing trunk is put
into the proper states, and start pulsing signal detection is done followed by
digit outpulsing. For CCIS, call processing is the same as a normal call but a
CCIS continuity check is performed while on the on-hook state.
For an incoming call, the CSDC bit from the Trunk Class Code (TCC) is
stored in the incoming register and a CSDC count is pegged. Digit collection
is performed and a terminating DN translation is performed. Ringing is applied
normally and once it has been answered, the incoming trunk is put in the
off-hook state to pass answer to the next office.
Standard disconnect and trunk guard timing is performed on CSDC calls
when the called or calling party goes off-hook after a talking path has been
established.
Standard CSDC Dynamics
======================
Call forwarding codes dialed after the CSDC code result in reorder.
The Call waiting option is also suspended when a CSDC call is in progress.
Busy tone is given to POTS call that terminates to a CSDC connection. Busy
tone is also given to a calling CSDC party if it encounters a busy line.
In order to have a 800 CSDC feature, the office must have CCIS INWATS ability
in the OSO (Originating Screening Office).
Dialing 911 after the CSDC code is allowed, but 411/611 calls are routed to
error messages.
NCTE (Network Channel Terminating Equipment)
============================================
As covered in Part 1, the NCTE is the equipment that you need to have CSDC.
The NCTE is a piece of hardware that is connected to the CO loop and a
terminal. On the terminal, there are 8 jacks for 8 pins on the NCTE. The
functions of each pin are as followed.
1 - TRANSMISSION DATA
2 - TRANSMISSION DATA
3 - MODE CONTROL
4 - MODE CONTROL
5 - TIP VOICE
6 - RING VOICE
7 - RECEIVED DATA
8 - RECEIVED DATA
==============================================================================
This ends PART II of the CSDC series. Since Taran King was in such a hurry, I
will finish the 3rd file with SCCS integrations, loop structure and RSS
structures.
If you have any questions about this file or any other file, please leave me a
message on either...
Phreak KlassRoom 2600 = 806-799-0016 LOGIN:EDUCATE
My Voice Mail Box = 214-733-5283
==Phrack Inc.==
Volume Two, Issue 12, Phile #7 of 11
-/\-/\-/\-/\-/\-/\-/\-/\-/\-/\-/\-/\-
\ /
/ Hacking : OSL Systems \
\ /
/ Written by Evil Jay \
\ /
/ (C) 1987/88 Evil Jay \
\ /
-/\-/\-/\-/\-/\-/\-/\-/\-/\-/\-/\-/\-
Prologue:
This file is for all those people who are running across the OSL system
and are constantly confused about getting in and what to do once you're in.
Because of the trouble I had getting a manual on the system from ROLM, I
was forced to write this file from what I already know, and what I can do
on the few systems I have gained access to. Since this file is far from
complete (without a manual, most are), I'll leave it to you, to write up
future files on the OSL system. Credit goes to Taran King who got me
interested in writing the file, and who tried to help me get a manual (my