Yealink T58W / T46S - Webclient “Hold” button greyed out, no SIP NOTIFY sent (Provisioned, Notify enabled)

[Albert-Jansen]

We are experiencing a persistent issue where the “Hold” button in the 3CX Webclient remains greyed out, even though the device is fully provisioned and all relevant control settings are enabled.

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Setup Details:​

• 3CX Version: v20 (latest build)
• Phones tested:
  
  • Yealink T58W (150.87.0.15)
  • Yealink T46S (66.86.0.15)
• Provisioning:
  
  • Via SBC (custom template applied manually via Extension > Phone Provisioning)
  • Factory reset + clean provisioning
  • Remote Control + SIP Notify = enabled
• Webclient device:
  
  • Shows “Deskphone” selected correctly

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Confirmed Working:​

• Calls and transfers from Webclient work
• Phone responds to SIP (manual Hold on device works)
• Calls show correctly in Webclient with control buttons

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Issue:​

• “Hold” button stays grey in all cases
• PCAP trace confirms:
  → No SIP NOTIFY is sent at all when “Hold” is clicked
  → Therefore: the phone never receives the command

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Additional Notes:​

• Custom provisioning template includes:

features.remote_control_notify.enable = 1
action_uri.allow_ip_list = any
features.pickup_directed_call.enable = 1

• Confirmed applied and active
• No errors in 3CX logs (no Notify failures or blocked events)
• Confirmed from PCAP: no SIP NOTIFY packets sent during Hold action
• Reproduced on multiple models and extensions, using fresh provisioning

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Our ask:​

• Is this a known limitation or regression in Webclient CTI/SIP Notify control?
• Is this specific to Yealink firmware 150.87.x.x (T58W) or more general?
• Can Webclient call control be forced or unlocked manually per extension/device?

 

[SweetAction]

I'm not 100% clear from your message above, but does it work correctly when you use a stock 3CX supplied template?

 

[Albert-Jansen]

I'm not 100% clear from your message above, but does it work correctly when you use a stock 3CX supplied template?

Unfortunately, the issue is exactly the same — the “Hold” button in the Webclient remains greyed out, and no SIP NOTIFY is sent to the phone.

 

[SweetAction]

Unfortunately, the issue is exactly the same — the “Hold” button in the Webclient remains greyed out, and no SIP NOTIFY is sent to the phone.

If you roll a phone back to previous firmware (like say 96.86.0.81) does it work?

 

[Albert-Jansen]

If you roll a phone back to previous firmware (like say 96.86.0.81) does it work?

I've tried, but it also doesn't work.

 

[victormatla]

Did you ever figure this out? We've got the same problem with Yealink T46U phones. Users can put calls on hold through the button on the phone, but de butten in de WebUI is grayed-out