Handsfree Unit - Northern Telecom DMS-100 Series General Description, Installation And Maintenance

AUTO-ANSWERBACK
(AAB) KIT

HANDSFREE UNIT

equipped with LCD indicators and are used for features which do not require
LCD indication (example: QTD key). This add-on unit attaches to the right side
of the business set if only one add-on unit is provided, or to the end of a row of
1 or 2 add-on units (the NT4X20AC is an end-unit which does not allow
further addition of any equipment at the right hand side of the unit).
Note: The NT4X20AC is rated A&M (additions and maintenace). Spare
parts for this module can still be ordered in accordance with Table 5-B.
1.15 The NT4X20AG is similar to the NT4X20AC add-on unit in
appearance and arrangement of key/LCD indicator strips, but can be used either
as an extendable add-on unit or as an end-unit.
1.16 The NT4X20AJ Kit contains one NT4X21AD module which mounts
in the Business Set to provide the AAB feature, and two (2) P0180923
mounting screws. The Business Set must be equipped with a Handsfree Unit
when this feature is assigned. This kit cannot be used with the NT4X20AT
ACD business set.
1.17 The NT1L00AA or NT1L05AA Handsfree Units (HFU) are identical
in function to the Companion and Logic Handsfree units, and are designed for
connection to the left side of the Business Sets. Provision is made for:
•
accepting incoming calls on either the HFU or the associated business set
• transferring calls between the HFU and the associated business set
•
dialing outgoing calls with the handset either on-hook or off-hook
• automatic cutoff of the HFU when the handset is lifted off-hook for
handset operation.
1.18 Controls on the face of the HFU are as follows:
• Volume control: to set the volume of the received signal on the HFU
speaker.
•
Indicator lamp: monitors the operating mode of the unit, i.e. the lamp
is on when the unit is in the transmit mode, and off when the unit is in
the receive mode.
•
ON key: used to switch on the unit. The key must be depressed
momentarily to answer an incoming call with the handset on-hook or
before commencing on-hook dialing. The key must be held depressed
until the handset is placed on-hook to transfer from handset to handsfree
operation. The key may be held depressed to hold a call on the unit with
both transmission and reception cut off (Note).
• OFF key: used to terminate a call on the HFU (Note).
• MUTE key: used to cut off transmission without affecting reception
(Note).
PRACTICE 297-2011-200
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