The Yealink SIP‑T40P is a high‑value SIP phone with HD audio, a 132×64 backlit display, PoE support and extensive security features.
The SIP‑T40P combines a sleek metal‑finished design with a 2.3‑inch backlit LCD, offering crystal‑clear HD audio and a range of programmable keys for efficient workflow. It supports paperless operation, multiple SIP accounts and a variety of communication functions such as call transfer, conference, and voicemail.
Technical specifications include support for G.722/711/729AB/726 codecs, PoE‑enabled dual Gigabit Ethernet, SRTP/TLS encryption, and a compact form factor with adjustable mounting options. The device is built for modern office environments with robust security and easy deployment. This manual is written in Chinese.
| Display | 2.3" 132×64 pixel grayscale backlit LCD |
|---|---|
| Audio codecs | G.722, G.711(A/μ), G.729AB, G.726 |
| Power consumption | 1.05 W – 3.23 W (adapter) |
| Dimensions (W×D×H×T) | 212 mm × 189 mm × 175 mm × 54 mm |
| PoE support | Dual Gigabit Ethernet with IEEE 802.3af PoE |
| SIP accounts | 3 VoIP accounts |
It supports SRTP and TLS call encryption, 802.1x MAC access control, MD5/MD5‑sess authentication and AES configuration files.
The phone provides three LED‑lit programmable line keys and three paperless programmable keys for quick access.