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o Busy Verification and attendant call through tests are not applicable
since there will no longer be specific trunks dedicated to the customer.
o The existing trunk group busy lamps are replaced with busy lamps for the
simulated facilities between locations.
The digit interpreter table entry at each remote location contains the
"Dial 0" DN for the attendant. This is done to process interlocation intercom
calls which terminate to the attendant. If the attendant console uses a centrex
data link, the line equipment assigned to the DN should specify the call
indicator lamp to be used. A different DN should be used for each location if
separate call indicator lamps are desired for calls from each location. This
call indicator lamp flashes at the intragroup rate of 120ipm (interruptions per
minute) to indicate interlocation intercom calls.
The RCLDN primitive is used to transmit information for intercom dialing
between locations. In addition, the RDLS priminitive is used to provide CWC
information to obtain the CWC group and location identifier of the called line.
The originating, incoming, and CCIS incoming registers are used to save
information at both he originating and terminating offices. These registers
include the CWC group, CWC location identifier, a CWC call type, and an
indicator whether simulated facilities were used at the originating.
==========================
=Remote Access to Private=
= Facilities =
==========================
Remote access to private facilities allows the CWC customer to access
physical private trunks and simulated facilities at a single location. This
allows customers to consolidate their private facilities at one location. The
number of trunks required is reduced. Any station can access these facilities
by dialing the same access code as the main location. If a station dials the
access code for a private facility, the call is routed to the main location
using the same facility as an interlocation intercom call. It is then routed
out from the main location. The CWC feature does not allow the customer to use
the ACOF (Attendant Control of facilities) feature from a remote location. The
types of private facilities which are accessible are:
o Tie Trunks
o FX (Foreign Exchange)
o CCSA (Commmon Control switching arrangement)
o ETS (Electronic Tandem Switching)
o WATS (Wide Area Telecommunications system)
o FRS (Flexible Route selection)
o EEDP (expanded electronic tandem switching dialing plan)
The CCIS direct signalling messages are used to communicate between the
remote and main locations during the digit collection and analysis of out-going
calls. Once the voice path has been established, a CCIS banded signalling
message transmits the digits collected. A remote access register is used to
store information retrieved during the processing of the signal requests. This
register belongs to the OR (Originating Register) pool at the main location.
The remote location is responsible for digit collection and transmission
of collected digits. A remote access data CCIS direct signalling message
transmits the digits from the remote to the main location, which returns
instructions for the next action to be performed. The following items are sent
from the remote to the main location:
o The digits collected.
o The FRL(facility restriction level) of orig. line.
o A FRL present indicator
o A customer changeable speed call indicator.
o A call forwarding over private facilities indic.
o An add-on indicator.
o The CC location identifier of remote location.
o The remote access register # of the main location.
o An abandon remote access request indicator.
The main location analyzes the information transmitted and returns the
next set of instructions to the remote location. The full analysis of a call
may require several direct signalling messages with information saved from the
previous direct signalling messages. This is required to process the current
direct signalling message being saved in the remote register. The information
gathered is used to establish the voice path for the call. Upon receipt of a
direct signalling request, processing is done in accordance with the function
indicated in the remote register. The types are as follows:
o Translate access code
o Translate prefix digit
o "1+" dialing check
o Check for possible account code
o Complete account code received
o 3 digit translation
o 6 digit translation
o 10 digit translation
o Analyze authorization code
o FRS 3 Digit translation
o CCSA translation
o Abandon call
After processing at the main location is complete, the remote access
register is set up to identify the next type of function. Then, the main
location returns a CCIS remote message to the remote location. The information
returned from the main location is always in the same format and is saved on
the OR.
==========
=Features=
==========