Model | | | | SIP-T21(P) E2 | |
Picture | | | |  | |
| | | | | |
LCD | | | | ۲٫۳″ graphical LCD | |
Resolution | | | | ۶۴×۱۳۲ | |
LCD Backlight | | | | √ | |
Line | | | | ۲ | |
PoE | | | | √ (T21P E2) | |
GigE | | | | x | |
Wall Mounting | | | | √ | |
Foot Stand | | | | ۱adjustable angle | |
USB Port (2.0 compliant) | | | | x | |
Ethernet Port | | | | ۲ x RJ45 10/100M Ethernet ports | |
Handset Port (RJ-9) | | | | √ | |
Headset Port (RJ-9) | | | | √ | |
External Yealink AC Adapter (optional) | | | | AC 100~240V input and DC 5V/600mA output (T21 E2: Standard/T21P E2: Optional) | |
Memory Key | | | | ۲ | |
Line Key | | | | ۲ | |
EXP50 Expansion Module (Accessory, purchased separately) | | | | X | |
Yealink EXP40 Expansion Module (Accessory, purchased separately) | | | | x | |
Yealink EXP20 Expansion Module (Accessory, purchased separately) | | | | x | |
Yealink EHS36 Wireless Headset Adapter (Accessory, purchased separately) | | | | x | |
Yealink YHS32 Headset (Accessory, purchased separately) | | | | √ | |
Yealink Bluetooth Adapter BT40 (Accessory, purchased separately) | | | | x | |
Yealink Wi-Fi Adapter WF40 (Accessory, purchased separately) | | | | x | |
USB Recording | | | | x | |
۳-way Conferencing | | | | √ | |
HD Voice | | | | HD Speaker HD Handset | |
|
Wide-band Codecs | | | | G.722, Opus | |
|
Narrow-band Codecs | | | | G.711(A/µ), G.729AB, G.726, iLBC | |
|
LCD Type | | | | Fixed | |
Operating System | | | | Linux | |
Built-in Bluetooth | | | | X | |
Built-in Wi-Fi | | | | X | |
USB Headset (Accessory, purchased separately) | | | | X | |
Camera | | | | X | |
Video Resolution | | | | X | |
Video Codecs | | | | X | |
۳-way Video Conferencing | | | | X | |
۵-way video/audio mixed conferencing | | | | X | |
HDMI | | | | X | |