A proprietary telephone (PT) user can talk to another party without lifting the handset. Pressing specific buttons, such as REDIAL, automatically activate hands-free mode.

•	PTs with the MONITOR Button PTs with the MONITOR button can dial in hands-free mode but cannot have hands-free conversations.

A proprietary telephone (PT) user can let others listen to the user's conversation through the built-in speaker, during a conversation using the handset.

•	Compatible Telephone KX-T7400 series (display PT only) and all KX-T7600 series telephones To enable this feature, system programming is required. If disabled, hands-free conversation is performed instead.

User Manual

1.4.7 Off-Hook Monitor

During a conversation, a proprietary telephone (PT) user can disable the built-in microphone or the handset microphone to consult privately with others while listening to the other party on the phone through the built-in speaker or the handset receiver. The user can hear the other party's voice during Mute. Only your voice will be muted.

•	This feature is available on all PTs that have the AUTO ANS/MUTE button.

User Manual

1.4.6 Mute

This PBX supports headset compatible proprietary telephones (PTs). A PT user can talk to another party hands-free and without lifting the handset by using an optional headset.
For connection and operation, refer to the Operating Instructions for the headset.

This feature is also known as Handset/Headset Selection.

•

If headset mode is on, pressing the SP-PHONE button activates the headset, not the built-in speaker.

•

To set the headset mode on a digital proprietary telephone (DPT), use personal programming (Headset Operation) or press the Headset button. To set headset mode on an analog proprietary telephone (APT), use the handset/headset selector located on the telephone and/or on the headset.

•

Headset Button
Any flexible button on a DPT can be customized as the Headset button. The Headset button can be also assigned to a flexible button on an APT, but the button will have no function.

•

Answer/Release Button
A flexible button can be customized as an Answer button or a Release button. Such buttons are useful for headset operation. It is possible to answer an incoming call by pressing the Answer button. While hearing a call waiting tone during a conversation, pressing the Answer button enables one to answer the second call by placing the current call on hold. Pressing the Release button enables one to disconnect the line during or after conversation, or to complete a Call Transfer.

•

It is possible to change from headset mode to hands-free mode or vice versa during a conversation by pressing the Headset button.

•

Headset users cannot use the following features:

—

Automatic Redial (

1.6.1.3 Last Number Redial)

—

Receiving the Off-hook Call Announcement (OHCA) (

1.7.4.3 Off-hook Call Announcement (OHCA))

—

Receiving the Whisper OHCA (

1.7.4.4 Whisper OHCA)

User Manual

Once Data Line Security is set on an extension, communication between the extension and the other party is protected from signals such as Call Waiting, Hold Recall and Executive Busy Override. Extensions which have devices connected to them such as modems or fax machines may set this feature to maintain secure data transmission, by blocking tones or other interruptions during communication.

User Manual

1.7.8 Data Line Security

A proprietary telephone (PT) user can use the FLASH/RECALL button (Flash/Recall mode or Terminate mode) or Terminate button (Terminate mode) to disconnect the current call and originate another call without hanging up.

Flash/Recall Mode: Disconnects the line and the extension user hears the dial tone from the line used last. For example, if a CO line call is disconnected, the extension user will hear a new dial tone from the same CO line.

Terminate Mode: Disconnects the line and the extension user hears a dial tone via the preferred CO line. (

1.5.5.2 Line Preference–Outgoing)

•

FLASH/RECALL Button Mode
One of the following modes can be selected for each extension through system programming:

—

Flash/Recall mode

—

Terminate mode

—

EFA mode. (

1.10.7 External Feature Access (EFA))

•

Terminate Button
Any flexible button can be customized as the Terminate button.

•

Disconnect Time (Only for Flash/Recall Mode)
The amount of time between successive accesses to the same CO line is programmable for each CO line port (

LCOT Disconnect Time [418]).

•

This feature generates a Station Message Detail Recording (SMDR) call record (

1.23.1 Station Message Detail Recording (SMDR)), restarts the call timer, inserts a pause, and checks the Toll Restriction (TRS) level (

1.8.1 Toll Restriction (TRS)) again.

•

If Automatic Route Selection (ARS) is used (

1.9.1 Automatic Route Selection (ARS)) or if a CO line call is established using the INTERCOM button or G-DN button, Terminate mode will be effective even when Flash/Recall mode has been set.

An extension user can access features of a host PBX or the telephone company, such as Transfer, Hold, Call Waiting, etc. A flash/recall signal is sent to the host PBX or the telephone company. This is only available on CO line calls, including Host PBX Access (

1.5.4.6 Host PBX Access Code (Access Code to the Telephone Company from a Host PBX)).

•	Flash/Recall Time The Flash/Recall time can be assigned for each CO line port ( LCOT Flash/Recall Time [417]).
•	EFA Button A flexible button can be customized as the EFA button.
•	This feature is accessed by pressing the FLASH/RECALL button which is set to EFA mode ( 1.10.6 Flash/Recall/Terminate) or the EFA button. It is also possible to perform this feature by entering the feature number when the current call is placed on a consultation hold ( 1.12.5 Consultation Hold).

User Manual

1.9.2 Host PBX

CO Line calls are limited by the following features:

Feature

Description

Extension-to-CO Line Call Duration

If a call between an extension user and an outside party is established, the call duration can be restricted by the system timer selected for each CO line group (

Extension-to-CO Line Call Duration [472]). Both parties will hear an alarm tone 15 seconds before the timer expires, at five-second intervals. If the timer expires, the line will be disconnected.
Class of Service (COS) programming determines whether this feature is enabled or disabled (

CO Line Call Duration Limitation [502]). Whether this feature is applied to outgoing calls only or to both incoming and outgoing calls is also programmable.

CO-to-CO Line Call (except Unattended Conference Call) Duration

If a call between two outside parties is established, the call duration can be restricted by the system timer selected for each CO line group (

CO-to-CO Line Call Duration [473]). Both parties will hear an alarm tone 15 seconds before the timer expires at five-second intervals. If the timer expires, the line will be disconnected.
This timer applies to CO line calls which are made via the PBX. If both calls are made by the extension (such as a CO line call made by an extension is transferred to an outside party), the shorter timer will apply to the call.

Dialing Digit Restriction during Conversation

While engaged on a received CO line call, the dialing of digits can be restricted. If the number of dialed digits exceeds the limitation, the line will be disconnected.

•	During an Unattended Conference Call, the Unattended Conference Recall time is applied. ( 1.13.1.2 Conference)

Two telephones can be connected in parallel to the same port. A single line telephone (SLT) or portable station (PS) can be connected in parallel with an analog or digital proprietary telephone (APT or DPT) or an SLT in the following combinations:

Main Telephone

Sub Telephone

APT or DPT

SLT

APT, DPT or SLT

PS (such as KX-TD7690)

When parallel mode is used, the two telephones function as follows:

•	Both share one extension number (main telephone's extension number).
•	Either telephone can make or answer calls.
•	Generally, if one telephone goes off-hook while the other is on a call, the call is switched to the telephone that goes off-hook.

[APT + SLT]
• If one telephone goes off-hook while the other is on a call, a three-party call is established. If one user goes on-hook, the other user continues the call.
• An extension user cannot originate a call from the SLT if the APT is:
—
playing background music (BGM)
—
receiving a paging announcement over the built-in speaker.
• The SLT will always ring for incoming calls (if its ringer is turned on). It cannot be programmed to not ring.

[DPT + SLT]
• The DPT and SLT must be connected to a super hybrid port of a DHLC card.
• If eXtra Device Port (XDP) mode is enabled, each telephone can act as completely different extensions with their own extension numbers. ( 2.1.1 Extension Port Configuration)
• When in the parallel mode, the XDP mode of the super hybrid port should be off through system programming.
• Whether the SLT rings for incoming calls is programmable.
Ring on: Both telephones ring when a call is received, except for when the proprietary telephone (PT) is in Hands-free Answerback mode ( 1.4.1.4 Hands-free Answerback) or voice-calling mode (Alternate Receiving Ring/Voice) ( 1.5.3 Intercom Call)
Ring off: Only the PT rings when a call is received, however, the SLT can be used to answer the call.
• If one telephone goes off-hook while the other is on a call, the call is switched to the telephone that goes off-hook. Note, however, that the call will not be switched when the extension is:
a) Being monitored by another extension ( 1.7.3 Call Monitor).
b) Receiving an Off Hook Call Announcement (OHCA) ( 1.7.4.3 Off-hook Call Announcement (OHCA)) or Whisper OHCA ( 1.7.4.4 Whisper OHCA).
c) On a conference call ( 1.13.1 Conference Features).
d) Using Live Call Screening (LCS) or Two-way Record ( 1.21.2 Voice Mail DPT (Digital) Integration).

[APT/DPT/SLT + PS]
• This connection is called Wireless XDP Parallel Mode.
• Generally, if one telephone goes off-hook while the other is on a call, the call is switched to the telephone that goes off-hook. For exceptions, refer to the Wireless XDP Parallel mode feature.

Installation Manual

User Manual

1.7.10 Paralleled Telephone

The Calling Party Control (CPC) signal is an on-hook indication (disconnect signal) sent from an analog CO line when the other party hangs up. To maintain efficient utilization of CO lines, the PBX monitors each line's status and when CPC signal is detected on a line, the PBX disconnects the line and alerts the extension with a reorder tone.

•	CPC signal detection is programmable for incoming CO line calls ( LCOT CPC Signal Detection Time–Incoming [414]), and for outgoing CO line calls ( LCOT CPC Signal Detection Time–Outgoing [413]).
•	If your telephone company sends signals similar to CPC, it is recommended not to enable CPC signal detection on outgoing CO line calls.
•	If CPC signal is detected during a conference call ( 1.13.1.2 Conference), the line is disconnected. The remaining parties stay connected.
•	If CPC signal is detected during a call between a caller using the Direct Inward System Access (DISA) feature ( 1.15.6 Direct Inward System Access (DISA)) and an extension or an outside party, the line is disconnected.

•	This connection is called Wireless XDP Parallel Mode.
•	Generally, if one telephone goes off-hook while the other is on a call, the call is switched to the telephone that goes off-hook. For exceptions, refer to the Wireless XDP Parallel mode feature.