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Colin EricksonAug 25, 2025
How to renew expired PIN on AudioCodes IP Phone?
- QqdiazAug 25, 2025
If your AudioCodes IP Phone displays 'PIN expired', renew the PIN expiration policy in the Lync server interface.
How to renew expired PIN on AudioCodes IP Phone?
If your AudioCodes IP Phone displays 'PIN expired', renew the PIN expiration policy in the Lync server interface.
What to do if AudioCodes 420HD shows 'PIN account disabled'?
If your AudioCodes IP Phone displays 'PIN account disabled', verify that the account is enabled in the Lync server interface. If it is not enabled, enable it.
How to fix 'Failed to validate certificate' on AudioCodes 420HD IP Phone?
If your AudioCodes IP Phone displays 'Failed to validate certificate' or 'Failed to obtain user certificate', ensure DHCP Option 43, sub-option 5, is enabled on your DHCP server. Also, verify access to the Lync Web service URL: https://lyncsvrWebPoolFQDN:443/CertProv/CertProvisioningService.svc. Finally, ensure the LDAP server (_ldap._tcp.) is enabled to obtain the root certificate.
How to resolve 'Failed to connect server' on AudioCodes IP Phone?
If your AudioCodes IP Phone displays 'Failed to connect server' or 'Cannot find Lync server at ' and cannot perform registration, ensure at least one of the following is enabled in the DNS server: _sipinternaltls._tcp. (for TLS), DHCP results (Option 120) (for TLS), _sipinternal._tcp. (for TCP), DHCP results (Option 120) (for TCP), _sip._tls. (for TLS), or _sip._tcp. (for TCP).
Why does my AudioCodes IP Phone headset have no audio?
If your headset has no audio on your AudioCodes IP Phone, the issue might be due to connection or volume settings. Here’s what to check: 1. Ensure the headset is securely plugged into the headset port on the side of the phone. 2. Make sure the headset volume level is appropriately adjusted.
How to fix poor LCD display on AudioCodes 420HD IP Phone?
To fix a poor LCD display on your AudioCodes IP Phone, adjust the phone’s screen contrast level and the screen’s backlight timeout.
What to do if my AudioCodes IP Phone is off (no LCD displays and LEDs)?
If your AudioCodes IP Phone is off, meaning there are no LCD displays and LEDs, it indicates the phone isn't receiving power. Here's what you should check: * Ensure the AC/DC power adapter is firmly connected to the DC input on the phone's rear. * Confirm the AC/DC power adapter is properly plugged into a functional electrical outlet. * If you're using Power over Ethernet (PoE), contact your system administrator to ensure the switch is providing power to the phone.
How to troubleshoot no audio in headset connected to AudioCodes IP Phone?
If you have no audio in your headset when connected to your AudioCodes IP Phone, consider the following: * Ensure your headset is securely plugged into the headset port on the side of the phone. * Verify that the headset volume level is adjusted adequately (see Section 4.9.5).
What to do if AudioCodes IP Phone displays 'LAN Link Failure'?
If your AudioCodes IP Phone displays a 'LAN Link Failure' message, it indicates there is no LAN connection. Here’s how to troubleshoot: * Verify that the LAN cable is securely connected to the LAN port on the rear of the phone. * Ensure the other end of the LAN cable is connected to the network switch. If it is not, inform your system administrator.
Why is my AudioCodes 420HD not ringing?
If your AudioCodes IP Phone is not ringing, the ring volume might be set too low. Increase the volume using the phone's settings (see Section 4.9.1).
General| Brand | AudioCodes |
|---|---|
| Model | 420HD |
| Category | IP Phone |
| Language | English |
