Yealink SIP-T21P

Yealink SIP-T21P - a new budget model for small and medium businesses, continuing the traditions of Yealink, perfectly combines style, high quality performance and advanced technical solutions . higher performance and improved technical characteristics, support for 2 SIP accounts with independent configuration.

Yealink SIP-T21P is a new budget IP phone for small and medium businesses, continuing the traditions of Yealink, perfectly combining style, high quality performance and advanced technical solutions. T20P, however, has higher performance and improved technical characteristics.

Phone specifications:

Support for 2 SIP lines with independent configuration.

• 2 programmable buttons with light indication.
• Fully Russified: has a Russian menu, web interface, and contact entry in Russian.
• Keyboard with Russian alphabet.
• Phone book (1000 entries), phone book export/import, black list, call history (100 entries), speed and accelerated dialing, dialing rules.
• Keypad lock, volume control, ringtone selection.
• Call hold and waiting, call forwarding and transfer, DND mode, conference calling, call pickup, intercom calls (including group intercom call: Paging), hotline, auto answer, emergency call, auto redial mode.
• Voicemail.
• Control and configure your phone from the keyboard, via a web interface or remotely.
• Centralized installation, setup, configuration and software update via Autoprovision function (TFTP/FTP/HTTP/HTTPS/PNP/DHCP).
• Support for SNMP v1/2, TR069 protocol (optional).
• Support for Yealink RPS (Redirection and Provisioning Service).
• Special features for BroadSoft, Genesys, etc. platforms.

Network characteristics of the Yealink SIP-T21P IP phone

• Support for SIP 2.0 protocol (RFC3261).
• Transport: UDP, TCP, TLS, DNS SRV.
• NAT transverse support: STUN mode.
• Call modes: Peer-to-Peer, SIP Proxy.
• 3 network modes: DHCP/static IP/PPPoE.
• Support 802.1x, LLDP.
• Support VLAN (IEEE 802.1p/q tagging); TOS (layer 3).
• Supports in-band DTMF, out-of-band RFC2833 DTMF and SIP INFO.
• Support for encryption and identification standards (MD5 and MD5-sess).
• SRTP support.
• HTTPS client/server.

Working with voice in the Yealink SIP-T21P IP phone

• HD speakerphone and hands-free call;
• Sound spectrum from 50Hz to 7kHz.
• Support for wideband codec G.722, support for standard codecs G.711, G.726, G.729AB, G.723.1.
• Supports VAD (Voice Activity Detection), CNG (Convenient Noise Generator), AEC (Echo Cancellation), NLP (Noise Suppression), AGC (Automatic Gain Control), AJB (Adaptive Jitter Buffer).
• High quality speakerphone with echo cancellation.

Physical characteristics of the Yealink SIP-T21P IP phone

• Two RJ45 ports (NAT and Bridge modes).
• Headset jack RJ9(4P4C).
• LCD: 132x64 pixels without screen backlight.
• Supports Power over Ethernet (802.3af) Class 2.
• DC 5V, 0.6A.
• Consumption: 1.4-2.6W.
• Possibility of wall mounting.
• Working temperature: 0°~40°.
• Dimensions: 188x150x41mm.
• Weight: 0.81kg.
• Colour: grey.