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be effected. If the other station does not have access
to the incoming line, transfer can still take place using
the system transfer feature. For a screened transfer,
a call is transferred to another station with a
pre-transfer announcement by the transferring patty.
Transferring calls is accomplished with the
TRANSCONF
button. Also refer to the discussion
titled: Call Transfer- Unscreened.
CALL TRANSFER
-
UNSCREENED,
An active call can be transferred to another station
without being announced. The transferred call will
camp-on to the other station where it will ring and
await an answer. The call will automatically ring back
to the transferring station after a programmable recall
period. There is no limit as to how many calls can be
camped onto another station. A transferred call will
only ring if the station is idle. The system class of
service programming determines the recall time for an
unanswered transferred call.
CALL WAITING TONE
The call waiting tone may be signalled to a busy
station to indicate that another station or the attendant
wants to contact the busy station. A special code is
dialed to activate the tone.
CALLING STATION
IDENTIFICATION ON BLF
If the station number of a calling station has been
programmed into the direct station select/busy lamp
field (DSS/BLF) of a called station, the caller will be
identified by flashing at the corresponding BLF light.
The lights also indicate the status of the DSS
telephones: dark = idle, steady-on = in use, flash =
calling (or ringing when station monitoring is enabled),
and flutter = call back request (if feature is available.
No class of service programming is required for this
feature. Also refer to the discussions titled:
Programmable DSS/BL F and Call Messaging.
CLASS OF SERVICE PROGRAMMING
(FROM MAIN STATION)
Class of service (COS) programming is used by the
installer to configure and assign all system, line,
station, and special purpose operating features. The
installer enters COS programming by dialing an
access code over the intercom line. System
administrators can enter COS programming with
another code to reprogram any system, station, or
special purpose operating feature that may require
change at a later date. Line reprogramming abifiiy is
not available through system administration
programming. The system attendant can reprogram
certain system-wide features that require periodic
change by entering COS programming with another
IMI 66-083
Description Of System
Feat1
P
code provided for this purpose. The station user can
program individual stations for speed dial, autodial and
direct station selection (DSS) by entering COS with a
code provided for that purpose. Thus, COS
programming is arranged with a hierarchical order
from the highest (the installer) to the lowest (the
station user) level wfth a higher level programmer
having the ability to do anything a lower level
programmer can do without exiting a current
programming mode. However, only the station user
can program the speed dial and autodial locations at
telephone.
All class of service (COS) programming is performed
from station 10 or 12. Any station and console
combination will function in this mode and provide
visual feedback with the LED associated with the
programming button. By employing an LCD
speakerphone, however, the programmer will have the
benefit of display prompts and verifications to simplify
and clarify the programming procedures. Class of
service programming access is as follows:
l
Installer dials: ITCM
%
# 7 4 6
+K
l
Administrator dials: ITCM
+++
# 2 3 6
+I+
l
Attendant dials: ITCM
%
# 0
l
User dials: ITCM
+#
+
Class of service programming can be performed using
instructions provided in Chapter 4, Sections
2,3
and 4.
CLASS OF SERVICE PROGRAMMING
(VIDEO DISPLAY TERMINAL)
An asynchronous, serial data terminal with an RS-232
interface can be used to effect class of service
programming through menu-driven procedures. VDT
programming provides a menu-driven approach to
programming as discussed in Chapter 4, Section 5.
CLASS OF SERVICE
PROGRAM PRINTOUT
Connection terminals are provided to interface an
RS-232 compatible, asynchronous serial data printer
to the system. The connected printer will provide a
printout of class of service and toll restriction records.
The data prlnter service class of service programming
determines the nature and extent of each requested
printout. The system class of service programming
specifies the bit-length and baud rate of the data.
COMMON AUDIBLE
RINGER INTERFACE
Connections are available at the wmmon equipment
that provides “dry-contact” relay closures whenever an
incoming line rings. These contact closures track the
ringing pattern and can be used to control an external
2-5