CrewPTT
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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.
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, N770 and N870, software 2.70 or higher
- Feature set
- Installation and configuration
- DECT handset Push-to-talk
- DECT headset Push-to-talk
- Push-to-talk SIP account
- SIP Calls
- Failure cases
- Auto-provisioning
- Frequently asked questions
| 1. Feature set |
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| Hardware | This feature is supported by the
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| 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/N770: Up to 20 DECT headsets/handsets and up to 4 base-stations (N770) N870: up to 30 DECT headsets/handsets and up to 4 base-stations (Will be extended in a later release) 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: | |
| Telephony | CrewPTT works in parallel with normal telephony. Each CrewPTT group also has an Phone-number that can be used to dial-in the CrewPTT group, example: Door-intercom, Assistance Point. Via key press on the headset you can move the SIP call from the CrewPTT group to your headset for a one to one conversation. Via CLIP/URI you can define if incoming calls are 2-way or audio muted to the caller. | |
| Licenses | You do not need any license ! |
2. Installation and Configuration
| Charge your devices | Always start with charging your handsets/headsets as:
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Installation of the DECT system | Install the DECT system conform the provided training/documentation/wiki. | |
Software | Upgrade your DECT system with the latest software. Upgrade your DECT handsets/headsets (if required) with the latest software. | |
Configure your CrewPTT groups | Open the DECT system web-interface: Go to SETTINGS - CrewPTT
Click on
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| Parameter | Description | |
| PTT group | ||
| Activate | Enable/disable the PTT group | |
ID | The internal ID | |
| Name | The name of the PTT group | |
| DM Name | The name of the DECT manager that hosts the conference bridge for the PTT group | |
| Conference Bridge | The DECT base station hat hosts the conference bridge | |
| Max. number of talking members | The 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 name | The PTT group SIP account authentication name | |
| Authentication password | The PTT group SIP account authentication password | |
| Username | The PTT group SIP account username | |
| VoIP provider | The VoIP provider used for this SIP account | |
| Maximum SIP PTT time | The SIP call will be automatically ended after the timer | |
| Allow outgoing audio for numbers | Incoming SIP Caller By default: Empty. You can enter up to 4 phone numbers/URIs, or * to apply the setting to all incoming calls. Empty An incoming SIP caller is connected to the CrewPTT group, but cannot hear what is being discussed within the group. But the CrewPTT group can hear the caller. Example: A door intercom calls the CrewPTT group. Once connected, the door intercom plays an audio message into the group using its Door Intercom feature. The CrewPTT group can hear both the audio message and the person speaking at the door intercom, while the person at the door intercom cannot hear the conversation within the CrewPTT group. Using the Isolate Call feature, a CrewPTT member can establish a two-way audio connection with the door intercom. Enter a phone number/URI or * for all incoming SIP callers If the incoming caller's phone number/URI matches one of the configured entries, a two-way audio connection is established between the caller and the CrewPTT group. Example: When the manager calls the CrewPTT group, a two-way audio connection is established. When the door intercom calls the group, only a one-way audio connection is established. Note: A CrewPTT member can only speak to an incoming SIP caller by pressing the PTT button. | |
to edit or 
a new group.
Resources | CrewPTT groups require resources on the base station. We have created a tool that can be used to calculate the required resources.
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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.
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| 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
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| 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
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| Example: More then 2 groups are required (Coming soon) | Install a second 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:
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| Example: Integrator system example (Coming soon) | 2 CrewPTT groups per DECT manager is supported
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 CrewPTT group. Therefore using more then 2 groups, there should not be an overlap between DM A and DM B DECT area's.
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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.
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3. DECT handset Push-to-talk
The following DECT handsets can be used as PTT device:
- S700H Software 130.14 or higher
- R700H Software 130.14 or higher
- SL800H Software 131.14 or higher
- SL850H Software 143.04 or higher
Push-to-talk configuration via the handset | Open the handset menu and go to: Additional Features - CrewPTT
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Join PTT group | How to join a PTT group: In the CrewPTT settings menu, enable Activation to Join the selected PTT Group
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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
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When you Joined the PTT group, you will see:
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Listening mode | When a PTT call is started, the handset that joined the group will play the audio via the:
On the display you will see.
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In the Listening mode, the Soft-key Options offers the possibility to:
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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.
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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.
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 Talk 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
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Leave PTT Group | How to leave a PTT group: Via the CrewPTT settings menu:
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Handset Joined the PTT functionality and is in IDLE mode.
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Charging Cradle | If the DECT handset is on the Charging Cradle and an PTT call is started, if the handset joined the PTT group it will 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. Via the option "Pause in charger", the handset will when placed in the charger leave the group and not play the CrewPTT audio via the speaker. If removed from the charger the handset will automatically join the CrewPTT group again.
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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 - Additional Features - CrewPTT - select the PTT group
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Wired headset | It is possible to use a wired headset with the following requirements:
You would need to search for a security headset with the above PIN layout like the headset below.
When you press the PTT button, there is a shortcut of the Microphone with Ground. This means that you can not talk as the microphone will not work. Usage:
To use wired headsets you need to adjust the Headset/microphone volume/sensitivity. Example: With the above headset, the microphone sensitivity was needed to set to the lowest level 1. Headset microphone Sensitivity: On the handset, long press microphone (Center key - right), Corded headset Headset speaker volume: On the handset, press volume key (Center key - up), handset volume, Corded headset Corded Headset Boost: On the handset, press the Center key - Settings - Audio Settings - Corded Hdst Boost |
4. DECT headset Push-to-talk
The following DECT headsets can be used as PTT device:
- Gigaset CH61D, preferred and special developed for CrewPTT
- Gigaset CH41D
- Gigaset CH21D
Gigaset CH41D
| Gigaset CH21D
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| 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:
CH41D:
CH21D: Turn On: Press and hold the push-to-talk button for approx. 2 seconds. Turn Off: Press and hold the mute button for approx. 4 seconds. |
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 switch to listening mode. 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 microphone is muted. Talk back: Press and hold the push-to-talk 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 push-to-talk button, you will hear a BEEP and then you can talk to other participants. Release the push-to-talk 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. 
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PTT Lock | Press the push-to-talk 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 push-to-talk button. LED blinks 500ms(On), 1500ms(Off) How to end: Press the push-to-talk 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. Short press the F2F/Mute button. An audio prompt will be played "Group muted". The user is informed every minute with an audio prompt "Group muted" How to end the face-to-face mode: Press the F2F/Mute button An audio prompt will be played "Group un-muted" 
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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. 
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Incoming SIP call | ED blinks 200ms(On), 800ms(Off) Short press push-to-talk 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. |
In charger |  |
| 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
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Turn On
Turn Off
5. Push-to-talk SIP account
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.
8. Auto-provisioning
Add PTT Group
<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
<provisioning version="1.1" productID="e2">
<nvm>
<oper name="delete_ptt_group" value="ptt_000001" />
</nvm>
</provisioning>
Assign PTT groups to handset
<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
<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
<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
Calculate Multicast IP address
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>.- If required, via provisioning this can be changed