Yealink SIP-T21P E2 - VoIP phone - SIP, SIP v2 - 2 lines

General

Product Type

VoIP phone

Miscellaneous

Connections

Headset jack / RJ-9

Placing / Mounting

Wall-mountable, table-top

Display

Type

LCD display - monochrome

Display Resolution

132 x 64 pixels

Display Location

Base

Backlit

Yes

Phone Features

Dialer Location

Base

Indicators

Visual ringer light, voice message waiting indicator, line status indicator

Speakerphone

Yes

Additional Functions

Web browser, Intercom

Messaging Services

SMS

Call Services

Voice Mail, Caller ID, Call Waiting, Call Forwarding, Call Transfer, Call Hold, Message Waiting Capability

Dimensions & Weight (Base)

Width

20.9 cm

Depth

18.8 cm

Height

15 cm

Phone Memory

Phone Directory Capacity

1000 names & numbers

IP Telephony

Network Protocols

IP, TCP, TFTP, UDP, HTTP, DNS, HTTPS, SRTP, RTCP, SNTP

Main Features

Integrated Ethernet switch

Voice Codecs

G.722, G.723.1, G.729ab, G.711u, G.711a, G.726, iLBC

Quality of Service

IEEE 802.1Q (VLAN), Differentiated Services (DiffServ), IEEE 802.1p, Type of Service (ToS)

IP Address Assignment

DHCP, static

Network Ports Qty

2 x Ethernet 10Base-T/100Base-TX

VoIP Protocols

SIP, SIP v2

Voice Features

Comfort noise generation (CNG), voice activity detection (VAD), HD Voice, acoustic echo cancellation (AEC), packet loss concealment (PLC), adaptive jitter buffer (AJB), automatic gain control (AGC)

Lines Supported

2 lines

Security

EAP-MD5, IEEE 802.1X, TLS

Network Features

Network Address Translation (NAT), Class 2 PoE, Lightweight Directory Access Protocol (LDAP)

Power Over Ethernet (PoE) Support

Yes

VoIP

Yes