Here we describe how to configure the CrewPTT feature.

We assume that it is installed by an qualified technician who have the knowledge about the Gigaset DECT system.


Valid for:

  • N670
  • N770 (Coming soon)
  • N870 (Coming soon)

CrewPTT

Enhancing In-Store Collaboration with a DECT Push-to-Talk Solution

Delivering exceptional customer service and operational efficiency in today’s fast‑paced retail environment demands seamless, real‑time communication. Our DECT CrewPTT solution—comprising rugged handsets, headsets, intuitive software, and expert integration—empowers store teams to connect instantly, work smarter, and enhance safety, all while driving substantial cost savings.

Streamlined Operations and Cost Savings

By enabling associates to communicate hands‑free across the entire sales floor, our CrewPTT system significantly reduces unnecessary foot traffic. Eliminating walking distances/time per colleague each day translates to huge annual savings per store—funds that can be reinvested in customer experience initiatives or staff development. Whether conducting stock checks, responding to self‑checkout alerts, or coordinating price checks, teams stay focused on high‑value tasks rather than logistics.

Accelerated Customer Response

Equipped with one versatile device, staff can talk, listen, and act from anywhere in the store. Voice alerts for low stock, system notifications, or colleague requests are delivered instantly through the headset, empowering associates to assist customers three times faster. From handling till enquiries to advising on product availability, teams maintain a continuous flow of information, ensuring shoppers enjoy prompt, knowledgeable service.

Unified Device for Communication and Training

Our DECT handset/headset is more than a walkie‑talkie—it’s a multi‑functional tool designed for retail. In addition to CrewPTT calls, associates can receive real‑time voice prompts for stock replenishment, price overrides, or safety alerts. New hires benefit from on‑the‑job coaching: trainers can guide remotely, providing step‑by‑step instructions without leaving the sales floor. This “learn‑as‑you‑serve” approach accelerates ramp‑up times and maintains service standards.

Enhanced Security and Team Safety

Integrating seamlessly with existing security systems (AML), the CrewPTT solution delivers immediate, discreet alerts when incidents occur. Rapid coordination reduces theft incidents, while associates report feeling safer—knowing backup is just a button press away. Whether facing a shoplifting event or managing an emergency, store teams can mobilize swiftly, keeping both customers and colleagues secure.

Conclusion

Our DECT CrewPTT solution transforms in‑store communication—driving efficiency, boosting customer satisfaction, and fortifying security. By uniting hardware, software, and integration expertise, we enable retailers to operate leaner, serve customers faster, and create a safer shopping environment. Empower your team with instant, reliable voice connectivity and experience the future of retail collaboration today.

Valid for N670. Software 2.67 or higher is needed. (Coming soon for N770 and N870)

  1. Feature set
  2. Installation and configuration
    1. Installation of the DECT system
    2. Software
    3. Configure your PTT groups
    4. Assign which DECT bases support which PTT group
    5. DECT handset/headset configuration
  3. DECT handset Push-to-talk
    1. Push-to-talk configuration via the handset
    2. Join PTT group
    3. Listening mode
    4. Initiate a Push-to-talk call
    5. PTT Lock
    6. Leave PTT Group
    7. Charging Cradle behaviour
    8. Switch between PTT groups
  4. DECT headset Push-to-talk
    1. Push-to-talk configuration
    2. Join PTT group
    3. Listening mode
    4. Initiate a Push-to-talk call
    5. PTT Lock
    6. Face-to-face
    7. Switch between PTT groups
  5. Push-to-talk SIP account
    1. Incoming SIP call, PTT group is not started
    2. Incoming SIP call, PTT group is already started
  6. SIP Calls
    1. User is in a PTT call and receives an SIP call
    2. User is in a SIP call and receives an PTT call
    3. User is in a PTT call and wants to start an outgoing SIP call
    4. User is in dialling state, phone-book access or has a handset menu open
  7. Failure cases
    1. PTT group unavailable
    2. All DECT channels busy
    3. Maximum simultaneous calls
  8. Auto-provisioning
  9. Frequently asked questions


1. Feature set

Hardware

This feature is supported by the N670 (Internal telephony role must be disabled. Coming soon for N770 and N870)

Up to ... CrewPTT groups

You can create up to 2 CrewPTT groups per DECT Manager. (Planned, up to 20 CrewPTT groups for an XXL Integrator system)

Up to ... CrewPTT group members

N670: Up to 20 DECT headsets/handsets

N770/N870: up to 50 DECT headsets/handsets (Coming soon)

The CrewPTT group SIP account is not counted as member

Up to ... simultaneous connections

Up to 6 simultaneous DECT calls + 1 SIP call per CrewPTT group

Supported devices

The following devices are supported:

  • DECT headsets (Coming soon)
    • Gigaset CH41D
    • Gigaset CH21D
  • DECT handsets (Via software update)
    • S700H
    • R700H
    • SL800H
    • R700H Protect
    • SL850H
  • CrewPTT group SIP account

2. Installation and Configuration


Installation of the DECT system

Install the DECT system conform the provided training/documentation/wiki.

Software

Upgrade your DECT system with the software 2.67 or higher.

Upgrade your DECT handsets (if required) with the latest software.

Configure your CrewPTT groups

Open the DECT system web-interface: Go to SETTINGS - CrewPTT

Click on to edit or   a new group.


ParameterDescription
PTT group
ActivateEnable/disable the PTT group
IDThe internal ID
NameThe name of the PTT group
DM NameThe name of the DECT manager that hosts the conference bridge for the PTT group
Conference BridgeThe DECT base station hat hosts the conference bridge
Max. number of talking membersThe maximum number of simultaneous DECT calls for this group
Maximum PTT lock time

A PTT user can via the handset/headset PTT lock feature talk to group members without holding down the PTT button.

To avoid that these users keep the group occupied continuous a maximum timer should be able to configure. When this timer has passed, the user who has the PTT lock activated will be switched to listen mode.

SIP account


Authentication nameThe PTT group SIP account authentication name
Authentication passwordThe PTT group SIP account authentication password
UsernameThe PTT group SIP account username
VoIP providerThe VoIP provider used for this SIP account
Maximum SIP PTT time

The SIP call will be automatically ended after the timer

Resources

CrewPTT groups require resources on the base station.

We have created a tool that can be used to calculate the required resources. 



Base stations under the same DECT manager can handle maximum 2 CrewPTT groups.

A Base station must be selected that acts as the conference bridge for a CrewPTT group.

Enabling CrewPTT or using a Base station as Conference bridge takes resources, therefore the tool to calculate the free call capacity.


Example: All-in-one system example, one floor - max 2 groups.

All-in-one system can handle maximum 2 CrewPTT groups

For each group a DECT base must be assigned as Conference bridge

Example: All-in-one system example, multiple floors - max 2 groups

All-in-one system can handle maximum 2 CrewPTT groups

For each group a DECT base must be assigned as Conference bridge

To cover the 2e floor an additional DECT base is added, also coverage from DECT base floor 1

Example: More then 2 groups are required (Coming soon)

Install a second all-in-one system

  • First system handles CrewPTT group 1-2
  • Second system handles CrewPTT group 3-4
  • Also the DECT bases must be installed for the 2e all-in-one system

Handsets and headsets that belong to group 1-2 are registered to 1th system

Handsets and headsets that belong to group 3-4 are registered to 2e system

Telephony between the systems are done via the SIP platform

There is no handover and roaming between the systems

It can not be one Integrator systems as:

  • Handsets and headsets should not roam to other DM as the CrewPTT groups are DM dependent.
  • Roaming in an integrator system can't be blocked !!!

Example: Integrator system example (Coming soon)


2 TeamCOM groups per DECT manager is supported

  • Group 1-2 only available at DM A
  • Group 3-4 only available at DM B

Handset or headset can roam to other DM

If assigned, the handset or headset can switch to group of other DM

If there is an DM overlap, handsets or headsets switch automatically between DM's and with this leave the joined TeamCOM group.

Therefore using more then 2 groups, there should not be an overlap between DM A and DM B DECT area's.

DECT handset/headset configuration

After registering the DECT handsets and Headsets, you need to configure the CrewPTT settings.

Go to: SETTINGS - Mobile devices - Administration - Select your handset/headset.

ParameterDescription
PTT group joinedShows the Joined PTT group
Allow leaving all groups

Offers the possibility to select "No group".

If the optional "No group" is selected, the user can switch to this group and will not

be disturbed by any CrewPTT group.

PTT groups assignment

Assigned groups: The CrewPTT group that the handset can join

Available groups: The list with available CrewPTT groups

3. DECT handset Push-to-talk

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The following DECT handsets can be used as PTT device:

  • S700H PRO software 130.13.06 or higher
  • R700H PRO software 130.13.06 or higher
  • SL800H PRO software 131.13.06 or higher
  • SL850H PRO software ... (Coming soon)
  • R700H Protect PRO software ... (Coming soon)

Push-to-talk configuration via the handset

Open the handset menu and go to: Additional Features - CrewPTT


ParameterDescription
Activation

Enabled: The handset is member of the assigned CrewPTT group

Disabled: The device can not join/listen to a CrewPTT group

Confirmation tone

Enabled: A confirmation tone is played when the handset switches to "Listening" mode

Disabled: If in the PTT group a conversation is started, there is no confirmation tone played

Vibration

Enabled: Vibration is played when the handset switches to "Listening" mode

Disabled: If in the PTT group a conversation is started, there is no vibration is played

Assigned PTT group name

Shows the name of the current assigned CrewPTT group

Click Change to open the menu with available CrewPTT groups for this user.

Select the group you want to join.

If the optional "No group" is selected, the user can switch to this group and will not

be disturbed by any CrewPTT conversation.

Join PTT group

How to join a PTT group:

In the CrewPTT settings menu, enable Activation to Join the selected PTT Group



The soft-key "Join" is available

Click "Join" to join the PTT group

The soft-key will be changed to "Leave"

Click "Leave" to leave the PTT group



When you Joined the PTT group, you will see:

  • PTT group name
  • Icon

Listening mode

When a PTT call is started, the handset that joined the group will play the audio via the:

  • Handset
  • Wired headset if connected
  • Bluetooth headset not supported

On the display you will see.

  • Headline: PTT Listening
  • Icon indicating listening mode
  • PTT Group name


If confirmation tone and/or vibration is enabled. When the first announcement in the PTT group is started, the handset will play one-time, the confirmation tone/vibration

In the Listening mode, the Soft-key Options offers the possibility to:

  • Talk lock feature
  • Leave the PTT Group
  • Open the PTT Group Settings menu


Press the End key to temporarily leave the PTT Group, to for example start a SIP call.

You will not listen to existing PTT group conversations. You will automatic be switched back to listening mode when a Group member that was in listening mode starts talking in that group.

Pressing the End key has no influence on the other PTT group members.

Initiate a Push-to-talk call

You can start a Push-to-talk call using the configured Soft-key Talk.

The handset will switch to PTT Talking mode.

  • Headline: PTT Talking
  • Icon
  • PTT group name

Release the Talk key when you finish speaking


PTT Lock


The PTT Lock will allow you to talk to other PTT members without holding the Soft-key Talk.

How to Activate:

Press the soft-key Options when the handset is in Listening mode, then select Lock.

How to end:

Press the soft-key Unlock or automatic after maximum lock timer has finished (By default: 3 minutes)

The handset will return to Listening state

Leave PTT Group

How to leave a PTT group:

Via the CrewPTT settings menu:

  • In the CrewPTT settings menu, disable Activation to leave all PTT Groups


Handset Joined the PTT functionality and is in IDLE mode.

  • Press the Soft-key Leave to Leave the PTT group

Charging Cradle


If the DECT handset is on the Charging Cradle and an PTT call is started, the handset will join the PTT group and play the audio via the speaker.

If you take the handset from the charger, the PTT call will not be disconnected.

If the DECT handset is in a PTT call and the handset is placed on the charger, the PTT call is not disconnected.

Switch between PTT groups



The system supports up to 2 PTT Groups per DECT manager.

Both groups needs to be configured to be able to switch between the groups.

How to switch between the Groups.

Handset in Idle state:

On the DECT handset open the Menu - Push to talk - select the PTT group

Handset in PTT Listening state:

Press the soft-key Options when the handset is in Listening mode, then select Switch group.

4. DECT headset Push-to-talk

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The following DECT headsets can be used as PTT device:

  • Gigaset CH41D
  • Gigaset CH21D

Gigaset CH41D


  1. Microphone cover
  2. Microphone indicator
  3. Microphone boom
  4. Headset rubber pad
  5. Headband bottom cabinet
  6. Slider
  7. Linkage
  8. Speaker Cover
  9. Earpad Cushion
  10. Earpad
  11. Outer housing
  12. Inner housing
  13. Ring
  14. Earcup cover
  15. Talk / Off key
  16. Power/DECT key
  17. Light guide
  18. Volume key
  19. Hard key
  20. Mute key
  21. Headband top cabinet
  22. Earcup light guide
  23. Head Holder cover
  24. Head Holder


Gigaset CH21D


  1. Top Housing
  2. Volume Key
  3. Microphone boom
  4. Power Key
  5. Power Key LED
  6. Mute Key
  7. Back Housing
  8. Mic Boom Rubber Part

Headset On/Off

The headset can be switched on/off via the on/off switch.

If the headset is configured as CrewPTT user, the headset will be assigned to the first CrewPTT group of the connected DECT Manager.

The following audio prompts are supported:

  1. ON+connected: "Connected"
  2. ON+not connected: "No connection"
  3. ON + no CrewPTT group: "No group"

Headset On

Headset Off


Push-to-talk configuration

The configuration of the DECT headset is done via the DECT system web-interface


Join PTT group

The headset is part of the configured PTT group, done via the DECT system web-interface

The headset will automatically join the last joined PTT group or the first PTT group in case the headset never joined a group before.

When another group member starts a PTT call, your headset will automatic join this group

LED blinking 100ms(On), 4900ms(Off)


Un-join all PTT Groups

If the administrator has assigned the PTT group "No group" the user can switch to this group and will then not be part of any PTT group but still can receive SIP calls


Listening mode

When a PTT call is initiated, the headset that is member of the group will play the audio.

The headset is Muted.

Press and hold the Hook button, you will hear a BEEP and then you can talk to other participants.

LED blinking 100ms(On), 4900ms(Off)


Initiate a Push-to-talk call

Press and hold the Hook button, you will hear a BEEP (the beep is played by FP, when FP thinks, that most handsets are ready for listening) and then you can talk to other participants. The Busy light ring indicated the talking via RED LED.

Release the Hook button when you finish speaking, the other PTT group members can't hear you any-more.

There is no time limited when manually pressing the Hook button, that the conversation is automatically ended.

When there are no resources available to talk, then the user will be notified via an audio indication.


PTT Lock

Press the Hook button multiple time (during start of the call) to enter the Lock state. Multiple time press when the call is already started, will not start the lock state.

The Lock will allow you to talk to other PTT members without holding the Hook button.

An audio prompt will be played "Lock"

If you are already in Talking state by pressing the Hook button. Press Hook multiple time to enter the Lock state.

LED blinks 500ms(On), 1500ms(Off) 

How to end:

Press the Hook button or automatic after maximum lock timer has finished (3 minutes), via provisioning this timer can be changed

An tone will be played to indicate the user the lock state is ended

The headset will return to Listening state


Face-to-face mode (Mute of the Speaker)

The Face-to-face mode allows you to talk to a person without being disturbed by PTT calls.

Long Press the F2F/Mute button.

An audio prompt will be played "Muted".

The user is informed every 5 minutes with an audio prompt "Muted"

How to end the face-to-face mode:

Press the F2F/Mute button

An audio prompt will be played "Unmuted"

No LED indication


Switch between PTT groups

Short press: group name check

An audio prompt will be played "Group ...".

Short press "again" within 3 sec after previous short press → selects next group with wrap around;

You can only switch between groups if the headset is in IDLE state.


Incoming SIP call

LED blinks 200ms(On), 800ms(Off)

Short press hook key: accepts incoming call

Press again to disconnect the call

If the Face-to-Face mode is activated, on incoming SIP call is signaled normally.

3-way calling is not supported, call waiting should be disabled in the platform or in our DECT systems for headset users

In charger

Speaker will be Off, no call indication.

DECT connection is available (SUOTA)

Blue LED:

  • <10% - 0,2Hz,
  • <50% 0,4 Hz; 
  • <99% 1 Hz
  • Off when fully charged


Off charger

Headset will try to connect to selected Group

Blue LED:

  • for battery <10%: blinks: 100ms(On), 900ms(Off)
  • for battery "battery warning": blinks: 100ms(On), 300ms(Off)

Factory reset

Hold: (Mute + P2T + Softkey) then power on


DECT registration

Set the Power/DECT switch for 3 seconds on the DECT position

Status LED blinks Blue and Busy LED Red

DECT registration is active for 5 minutes


  1. Volume up
  2. Volume down
  3. Function key - switch group
  4. Push-to-talk key
  5. Mute
  6. USB-C (Charging)
  7. Status LED
    1.   Headset: On - Battery: High

    2. No DECT connection

    3. Low battery (fast blinking) or charging

    4. Active call

    5. DECT registration active

    6. Firmware update

    7. Factory reset ongoing

5. Push-to-talk SIP account

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Each PTT Group has it's own SIP account. This SIP account can be used by non PTT group users to be able to speak and listen to the PTT Group.

This SIP account can only receive calls.

An incoming SIP call will automatic be answered.

Incoming SIP call, PTT group is not started.

An incoming SIP call will initiate a PTT call, all members can hear the caller.

To be able to talk back, the PTT member needs to initiate a PTT call.

When already members are speaking, the SIP caller can hear the messages.

Incoming SIP call, PTT group is already started.

The SIP caller can hear the messages and talk back.

6. SIP Calls

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Each DECT handset and/or DECT headset have an own SIP account

SIP Calls always have higher priority then PTT Calls


User is in a PTT call and receives an SIP call

If the user is in a PTT call and his SIP account is called, the PTT call will be interrupted and the SIP call is signalised. (Call waiting when in talking state)

The user can accept the SIP call.

When the SIP call is ended, the user will rejoin the PTT call in case the call is still active.

If the PTT call has ended, the device will return to IDLE state.


User is in a SIP call and receives an PTT call

If the user is in a SIP call and he receives an PTT call, this is not signalised to the SIP call participants.

The user stays in the SIP call and has no information that the PTT call is started.

When the SIP call is ended, the user will rejoin the PTT call in case the call is still active.

If the PTT call has ended, the device will return to IDLE state.


User is in a PTT call and wants to start an outgoing SIP call

If the user is in a PTT call and he wants to start a SIP call.

Press the End key to temporarily leave the PTT Group.

You will not listen to existing PTT group conversations. You will automatic be switched back to listening mode when a Group member that was in listening mode starts talking in that group.


User is in dialling state, phone-book access or has a handset menu open

Only if device = DECT handset

If the user is not in IDLE state but for example, starting to dial a number, searches for a phone number or has a handset menu open.

The user receives an PTT call, this is not signalised to the user.

When the handset goes to IDLE mode, the user will rejoin the PTT call in case the call is still active.

If the PTT call has ended, the device will stay in IDLE state.


User is already in a SIP call and receives a 2e SIP call

This is not supported for headsets as there is no MMI to operate multiple calls.

7. Failure cases

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PTT Group unavailable

If a user wants to initiate a PTT call, in the following failure cases an audio prompt will be played "Group unavailable"

  • The device can not connect to a DECT base that Broadcasts the PTT group
  • The PTT group is not active for example:
    • Master DECT base is not selected or offline
  • The device leaves the DECT bases that Broadcasts the PTT group


All DECT channels busy

If a user wants to initiate a PTT call, in the following failure case an audio prompt will be played "No channels available"

The user initiates an PTT call but there are no DECT channels available


Maximum simultaneous calls

If a user wants to initiate a PTT call, in the following failure case an audio prompt will be played "Maximum simultaneous calls"

The maximum simultaneous calls for the Group setting is "3" and the fourth user initiates a PTT call.



8. Auto-provisioning

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Add PTT Group

<?xml version="1.0" encoding="UTF-8"?>
<provisioning version="1.1" productID="e2">
<nvm>
 
	<!-- ptt_000001 for group 1, ptt_000002 for group 2, ptt_000003 ...
	The parameters below must be in the oper, else the group will not be added
 	-->
    <oper name="add_ptt_group" value="ptt_000001">
		<param name="PttGroup.DmId" value="local"/>
		<param name="PttGroup.Name" value="Shop"/>     
    </oper>
	<!--The following parameters can also be inside the oper but without the ptt_000001 -->
	
	<!-- MAC address of the device hosting the conference bridge  -->
	<param name="PttGroup.ptt_000001.ConferenceBase" value="589ec600c8a9"/>
	<param name="SipAccount.ptt_000001.AuthName" value="secret-name2"/>
	<param name="SipAccount.ptt_000001.UserName" value="User-name2"/>
	<param name="SipAccount.ptt_000001.AuthPassword" value="secret-password"/>
    <param name="SipAccount.ptt_000001.ProviderId" value="1"/>
	<param name="PttGroup.ptt_000001.VoipActive" value="1"/>
	<param name="PttGroup.ptt_000001.Active" value="1"/>

	<!-- General switch to activate CrewPTT -->
	<param name="DmGlobal.0.PttActive" value="1" />

     <!-- 
 	<param name="PttGroup.ptt_000001.MaxVoipTalkTime" value="180"/>
 	<param name="PttGroup.ptt_000001.RelPendingTime" value="3"/>
 	<param name="PttGroup.ptt_000001.MaxNoTalkingHs" value="3"/>
  	<param name="PttGroup.ptt_000001.MulticastIpAddr" value=""/> 
  	<param name="PttGroup.ptt_000001.MulticastIpPort" value="0"/> 
   	<param name="PttGroup.ptt_000001.MaxTalkLockTime" value="180"/> 
	-->
 
</nvm>
</provisioning>


Delete PTT Group

<?xml version="1.0" encoding="UTF-8"?>
<provisioning version="1.1" productID="e2">
<nvm> 
	<oper name="delete_ptt_group" value="ptt_000001" />
</nvm>
</provisioning>


Assign PTT groups to handset

<?xml version="1.0" encoding="UTF-8"?>
<provisioning version="1.1" productID="e2">
<nvm>
 
	<!-- oper overwrites the existing setting -->
	<oper name="assign_ptt_groups_to_handset" value="00029bb366">
        <param name="PttGroup" value="ptt_000001"/>
    </oper>

	<!-- Example to assign 2 groups
	<oper name="assign_ptt_groups_to_handset" value="00029bb366">
        <param name="PttGroup" value="ptt_000001,ptt_000002"/>
    </oper>
	-->
	<!--
	Allow leaving all groups for handset with IPUI 0029bb366
	-->
 	<param name="hs.0029bb366.PttNoGroup" value="1"/>
 
</nvm>
</provisioning>

Join handset to a CrewPTT group

<?xml version="1.0" encoding="UTF-8"?>
<provisioning version="1.1" productID="e2">
<nvm>
 
	<oper name="join_ptt_group">
        <param name="Ipui" value="0355ac147b"/>
        <param name="PttGroup" value="ptt_000001"/>
    </oper>
 
</nvm>
</provisioning>


Remove handset from CrewPTT group

<?xml version="1.0" encoding="UTF-8"?>
<provisioning version="1.1" productID="e2">
<nvm>
     <!--HS1 -->
    <oper name="assign_ptt_groups_to_handset" value="0355ac147b">
        <param name="PttGroup" value=""/>
    </oper>
    
  
</nvm>
</provisioning>

8. Frequently asked questions

Which multicast address is used

  • Each CrewPTT group is using it's own multicast address

  • The multicast address is automatically created

    • Default Multicast IP address

      Format:   239.<CRC byte 1>.<CRC byte 2>.<Group1:0 Group2:128>

      The CRC can be calculated with the following online tool: https://www.sunshine2k.de/coding/javascript/crc/crc_js.html

      Use the settings below with CRC Input Data = Your device MAC address, in the example below: 589EC600C8A9



      Convert the first two bytes of the CRC result from hex to decimal.

      Example: 0xA7 → 167, 0x44 → 68

      First group of a single DM: 239.167.68.0

      Second group of a single DM: 239.167.68.128

  • The port is calculated if the provisioning parameter MulticastIpPort = 0
    port number 46000 + 100*<DM-index>+<group-index>.

    • <DM-index>:
         "local" => 0
         "dm1" => 1
         "dm2" => 2
          .....

      <group-index>
         "ptt_00001" => 1
         "ptt_00002" => 2

  • If required, via provisioning this can be changed

What happens if another device is using the same multicast settings

  • When the other device is broadcasting then there will be be audio played in the CrewPTT group.

Which syslog information is available?

  • Maximum number of talking users is reached and another person wants to talk:
    Rejecting PTT connect request, too many talking BEPs
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