ATT System 25 Reference Manual

Forwarding
Display: Reception of a forwarded call follows the standard format for a redirected call, with the call
type descriptor “f” in position 16 of Screen 2.
A forwarding display station receives abbreviated alert when a call is forwarded to an outside
number; the display is flashed on Screen 1 only. The new forwarding descriptor “F” appears in
position 1, followed by the digits of the outside number.
Screen 1F912325552365
Following: Either Following or Forwarding, but not both, can be active at a...

Features and Services
Trunk Groups, Loop Start: If System 25 uses Loop Start trunks, calls can be forwarded to remote
locations only if Trunk-to-Trunk Transfer has been administered for Loop Start trunks.
Administration Requirements
Voice Terminal Port:
l Allow this station to toward calls to outside locations? (yes or no; default = no).
2-190November 1995 

Hands-Free Answer on Intercom (HFAI)
Hands-Free Answer on Intercom (HFAI)
Description
This feature allows the following voice terminals to provide hands-free answer service on
eligible incoming calls; each terminal must have Automatic Answer (AUTO ANS) assigned to
a flexible button.
l BIS (7305H03B, 7305H04C, 7313H01A, 7314H01A, 7316H01A, and 7317H01A) and
HFAI (7309H01A); these sets provide full service without requiring adjuncts.
l 10-Button (7303H01B), 34-Button (7305H01B), and 34-Button Deluxe...

FEATURES AND SERVICES
— The set generates a tone burst over its speaker to indicate an incoming call.
— The parties may converse.The called party can speak in a normal voice
toward the set. No other action by the called party is required.
— During the call, the called party can press the HFAI/Mic or MICROPHONE
button to mute the microphone temporarily and prevent the caller from
hearing. Pressing the button again turns the microphone on again.
— The HFAI/BIS user may pressthe SPEAKER (HFAI set) or the...

Hands-Free Answer on Intercom (HFAI)
Voice Terminals without Speakerphone or Headset Adapters
The HFAI feature is activated by pressing the AUTO ANS button. A beep signal announces
an incoming call and the SPEAKER LED lights.A one-way talking link is established from
the caller to the terminal; the user can hear the caller but cannot converse. Lifting the
handset connects the user to the caller.
Considerations
The user of a HFAI equipped station should always deactivate the HFAI feature when leaving
the...

FEATURES AND SERVICES
Headset Adapter Adjunct
Description
The headset adapter adjunct is an interface device for connecting a headset to an associated
voice terminal. A headset plugged into the adapter is activated by switches on the adapter.
The terminal operator has the choice of using either the handset or the headset for handling
calls. Turning the headset on and off is equivalent to lifting and hanging up the handset.
Considerations
Use of a headset allows a voice terminal operator to carry on...

Headset Adapter Adjunct
The 500A Headset Adapter is powered locally by a 2012D Transformer, which plugs into a
115V ac receptacle.Power from the transformer is applied to the voice terminal mounting
cord via a 400B2 adapter at the wall jack and conducted to the 500A on its connecting cord.
Refer to “Voice Terminal Adjunct Power Supplies” in Section 4 for additional information.
The 502B Headset Adapter does not require supplemental power, except when used with a
34-Button Deluxe, 22-Button BIS, 34-Button...

FEATURES AND SERVICES
SYSTEM 25
CABINET
ZTN79PART OF
HYBRIDOCTOPUS CABLE
PART OF SIP
LINE CP
C2SIPW1C1VOICE
ADAPT.B1TERMINAL
T1
C8
502B
HEADSET
ADAPTER
LEGEND:
B1 -
TYPICAL-103A CONNECTING BLOCK*
C1- MODULAR CORD (D8W-87) - FURNISHED WITH SET
C2 - OCTOPUS CABLE (WP90780) - PEC 2720-05P
C8 - SPECIAL CORD -FURNISHED WITH ADJUNCTT1 -7300H SERIES VOICE TERMINAL (EXCEPT 34-BUTTON DELUXE
AND ALL SETS WITH BUILT-IN SPEAKERPHONE)
W1 -4-PAIR INSIDE WIRING CABLE*
*- FURNISHED BY INSTALLER
Figure 2-30.Typical...

Headset Adapter Adjunct
SYSTEM 25
CABINET
ZTN79
HYBRID
LINE CPPART OF
OCTOPUS CABLE
PART OF SIP
C2SIPW1B1Z400FC1VOICE
ADAPT.ADAPT.TERMINAL
T1
C7
C8
PWR.
SUPPLY
P1502B
HEADSET
ADAPTER
LEGEND:
B1 -
C1 -
C2 -
C8 -
T1 –
W1 –
C7 -
P1 -
Z400F -
*-
Figure 2-31.
TYPICAL-103A CONNECTING BLOCK*MODULAR CORD (D8U-87) - FURNISHED WITH SET
OCTOPUS CABLE (WP90780) - PEC 2720-05P
SPECIAL CORD -FURNISHED WITH ADJUNCT
7300H SERIES VOICE TERMINAL (34-BUTTON DELUXE
AND ALL SETS WITH BUILT-IN SPEAKERPHONE)
4-PAIR INSIDE...

FEATURES AND SERVICES
SYSTEM 25
CABINET
PART OF
OCTOPUSCABLETN735MET
LINE CPPART OF SIP
SIPC2W1C1MET SET
ADAPT.B1T1
C7C8
248B
500AADAPT.HEADSET
ADAPTER
2012D
LEGEND:
B1 -
C1 -
C2 -
C8 -
T1 -
W1 -
248B ADAPTER -
400B2 ADAPTER -
2012D TRANSFORMER -
C7 -
*-TRANS
TYPICAL-103A CONNECTING BLOCK*MODULAR CORD (D8W-87) - FURNISHED WITH SET
OCTOPUS CABLE (WP90780) - PEC 2720-05P
SPECIAL CORD -FURNISHED WITH ADJUNCT
7203M -12-BUTTON MET SET
4-PAIR INSIDE WIRING CABLE*
MODULARIZES 2012D SOURCE
POWER ADAPTER
PEC...