The Yealink W70B can support up to 20 simultaneous calls.

   The Yealink W70B can connect up to 10 DECT cordless handsets or DECT headsets. The base station dimensions are 130 mm x 100 mm x 25.1 mm.

The Yealink W70B supports wideband codecs such as AMR-WB and G.722, as well as narrowband codecs including PCMU, PCMA, G.726, G.729, G.729A, and iLBC.

   The Yealink W70B offers TLS and SRTP encryption, along with support for OpenVPN, Transport Layer Security (TLS 1.0/1.2/1.3), and L2TP VPN for secure communication.

   The Yealink W70B base station measures 130 mm x 100 mm x 25.1 mm and can be placed on a desktop or wall-mounted.

In ideal conditions, the Yealink W70B base station has an indoor range of 50 metres and an outdoor range of 300 metres.

The Yealink W70B AC adapter supports an input of 100-240V AC and provides an output of DC 5V/600mA.

   Yes, the Yealink W70B supports the Opus codec, which performs well across a range of bandwidths, from narrowband to fullband.