Firmware update for IP-phone VP-17P. Firmware Version 1.5.7
VoIP
05 December 2025
Firmware update
Firmware Version: 1.5.7
The firmware and detailed description of the product capabilities are available in the Downloads or on the product page.
Added
- Support for combined DTMF transmission mode: RFC 2833 + SIP INFO
- Option to specify a backup NTP server for time synchronization
Improved
- Optimized echo canceller algorithm on the speakerphone interface
Fixed
- BLF failure when the "Remote Call Control" option is disabled
- Telephony Manager crash when an incoming call without caller ID (A-number) is received
- No audio after call transfer if the other party does not specify the call direction attribute when resuming media transfer
Mentioned products
IP-phone VP-17P
- SIP accounts:
- 4
- Display:
- monochrome
- Additional features:
- HD Voice