The Grandstream GHP621 is a compact IP phone designed for hotel rooms and similar environments, featuring 2 SIP lines, PoE support, speed dial keys, a customizable faceplate, and easy remote management via GDMS.
128×384 backlit LCD display
20 programmable dual-color buttons per module, 2 pages per module (40 contacts total)
BLF/speed dial
Daisy-chain up to 4 modules for up to 160 contacts/extensions
BLA (bridged line appearance)/SC
* GXV3674_HD: 1.2 megapixel Progressive Scan CMOS image sensor, 720p resolution
* GXV3674_FHD: 3.1 megapixel Progressive Scan CMOS image sensor, 1080p resolution
* Variable focal lens can be adjusted
â—†As days, weeks, months to set the attendance
â—†Support work in&out, relay, overtime setting
â—†Support holiday, weekend and leaving setting
â—†Support retroactive setting
â—†High resolution ratio LCD shows employee name, fingerprint image
WIFI Funtion
Supports 4 lines, 4 SIP accounts and 5-way voice conferencing
HD audio on speakerphone and handset, 5 programmable context-sensitive soft keys
Compatible with GXP2200 LCD extension module (GXP2200 EXT)
Hotel touch doorbell with do not disturb, clean room 
ZKteco 5V Mini-UPS for Fingerprint Time Attendance /Access Control ZK-B2 
