Yealink T21 E2 Entry Level IP Phone (without PoE)
Το μοντέλο SIP-T21 E2 της Yealink είναι ένα οικονομικό και εξαιρετικά αποδοτικό entry-level IP phone, που υποστηρίζει δύο λογαριασμούς SIP και HD Voice. Διαθέτει οθόνη LCD 132×64 pixels και δύο θύρες δικτύου 10/100 Mbps. Στην τιμή περιλαμβάνεται και το τροφοδοτικό.
Yealink T21 E2 Entry Level IP Phone (without PoE)
Audio Features
HD voice: HD handset, HD speaker
Wideband codec: AMR-WB (optional), Opus, G.722
Narrowband codec: G.711(A/µ), G.729AB, G.726, iLBC
DTMF: In-band, Out-of-band (RFC 2833) and SIP INFO
Full-duplex hands-free speakerphone with AEC
VAD, CNG, AEC, PLC, AJB, AGC
Phone Features
2 VoIP accounts
Call hold, mute, DND
One-touch speed dial, hotline
Call forward, call waiting, call transfer
Group listening, SMS, emergency call
Redial, call return, auto answer
Local 3-way conferencing
Direct IP call without SIP proxy
Ring tone selection/import/delete
Set date time manually or automatically
Dial plan
XML Browser, action URL/URI
Integrated screenshots
RTCP-XR, VQ-RTCPXR
Enhanced DSS Key
Directory
Loal phonebook up to 1000 entries
Black list
XML/LDAP remote phonebook
Smart dialing
Phonebook search/import/export
Call history: dialed/received/missed/forwarded
IP-PBX Features
Busy Lamp Field (BLF)
Bridged Line Apperance (BLA)
Anonymous call, anonymous call rejection
Hot-desking, voice mail
Flexible seating
Call park, call pickup
Executive and Assistant
Centralized call recording
Visual voice mail
Call recording
Display and Indicator
132 x 64-pixel graphical LCD with backlight
LED for call and message waiting indication
Dual-color (red or green) illuminated LEDs for
line status information
Intuitive user interface with icons and soft keys
Multilingual user interface
Caller ID with name and number
Feature Keys
2 line keys with LED
6 features keys: message, headset, redial,
transfer, mute, hands-free speakerphone
6 navigation keys
Volume control keys
Interface
2 x RJ45 10/100M Ethernet ports
Power over Ethernet (IEEE 802.3af), class 2 (T21P E2)
1 x RJ9 (4P4C) handset port
1 x RJ9 (4P4C) headset port
Management
Configuration: browser/phone/auto-provision
Auto provision via FTP/TFTP/HTTP/HTTPS
for mass deploy
Auto-provision with PnP
Zero-sp-touch, TR-069
Phone lock for personal privacy protection
Reset to factory, reboot
Package tracing export, system log
Network and Security
SIP v1 (RFC2543), v2 (RFC3261)
Call server redundancy supported
NAT traversal: STUN mode
Proxy mode and peer-to-peer SIP link mode
IP assignment: static/DHCP
HTTP/HTTPS web server
Time and date synchronization using SNTP
UDP/TCP/DNS-SRV (RFC 3263)
QoS: 802.1p/Q tagging (VLAN), Layer 3 ToS
DSCP
SRTP for voice
Transport Layer Security (TLS)
HTTPS certificate manager
AES encryption for configuration file
Digest authentication
OpenVPN, IEEE802.1X
IPv6
LLDP/CDP/DHCP VLAN
ICE
