What does 'PIN invalid phone info' mean on AudioCodes 400HD?
If your AudioCodes IP Phone displays 'PIN invalid phone info', make sure the correct information was entered in the phone screen and in the Skype for Business server interface, and that they tally. Also, verify in the Skype for Business server interface that the PIN is enabled and if it isn't, enable it.
How to fix 'Failed to validate certificate' on AudioCodes 400HD?
If your AudioCodes IP Phone shows 'Failed to validate certificate' or 'Failed to obtain user certificate': * Make sure DHCP Option 43, sub-option 5, was enabled in the DHCP server. If it wasn't, enable it. * Make sure you can access the Skype for Business Web service URL: https://lyncsvrWebPoolFQDN:443/CertProv/CertProvisioningService.svc * Query the LDAP server: _ldap._tcp.. Make sure it was enabled. If it wasn't, enable it in order to get the root certificate.
Why does my AudioCodes 400HD IP Phone say 'Failed to connect server'?
If your AudioCodes IP Phone displays 'Failed to connect server' or 'Cannot find Lync server at ', ensure that 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), _sip._tcp. (for TCP).
What to do if AudioCodes 400HD IP Phone fails to connect to time server?
If your AudioCodes IP Phone displays 'Failed to connect to time server' or 'PIN internal error', ensure that at least one of the following is configured to enable synchronization: NTP server via DNS SRV record (_ntp._udp. pointing to NTP server), NTP server returned via DHCP Option 42, Time.windows.com, Time.nist.gov, or a manually configured Configuration Parameter.
Why does my AudioCodes IP Phone headset have no audio?
If you're not getting any sound through your AudioCodes IP Phone headset, first ensure it's securely plugged into the headset port on the phone's side. Also, check that the headset volume is set to an audible level.
What to do if my AudioCodes 400HD is off?
If your AudioCodes IP Phone isn't turning on, start by ensuring the AC/DC power adapter is firmly connected to the DC input on the phone's rear and plugged into a functional electrical outlet. If you're using Power over Ethernet (PoE), contact your network administrator to verify the switch is providing power to the phone.
How to improve poor LCD display on AudioCodes IP Phone?
If the LCD display on your AudioCodes IP Phone is poor, try adjusting the phone’s screen contrast level and the screen’s backlight timeout.
General| Type | IP Phone |
|---|---|
| Audio Quality | HD Voice |
| Ethernet Ports | 2 |
| Display | Graphical LCD |
| Display Size | 2.8 inches |
| Connectivity | Ethernet |
| Power over Ethernet | Yes |
| Headset Port | Yes (3.5mm) |
| Supported Codecs | G.711, G.722, G.729, iLBC, Opus |
| Supported Protocols | SIP, RTP, RTCP, HTTP, HTTPS, TFTP, DNS, DHCP, TLS, SRTP |
Provides security recommendations for Android-based Teams devices.
Explains major Android-level security developments incorporated into AudioCodes devices.
Explains procedures for performing hard and soft restores to factory defaults.
Details the process of signing into the Microsoft Teams application on the phone.
Explains how network admins provision and sign in devices remotely.
Explains various methods for making calls, including dialing numbers and contacts.
Details how to make an emergency call from the locked or unlocked screen.
How to schedule and manage conference meetings from the phone.
Guides on configuring E911 emergency locations via the Teams Admin Center.
Steps for manually updating phone firmware using the Android Phone Utility.
Details on performing device recovery operations using key combinations.
Overview of the Android Phone Utility for debugging.
Using Tcpdump for packet analysis and network debugging.
Procedures for obtaining diagnostic logs from the device.
Downloading logs from the Microsoft Teams admin center.
Using rpcapd for analyzing and debugging Android traffic.
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