Grandstream Networks GXP2200EXT IP add-on module black 20 buttons
Large 128x384 graphic LCD providing feature-rich graphics
Daisy-chain 4 modules for up to 160 programmable buttons
2 page switch keys which allows up to 40 extensions per extension module
20 programmable buttons per module
Busy Lamp Field (BLF)

Grandstream UCM6202 IP PBX- 2 port by Grandstream
UCM6202 supports up to 500 users and 30/45 concurrent calls
Integrated 2/4/8 PSTN trunk FXO ports, 2 analog telephone FXS ports with lifeline capability and up to 50 SIP trunk accounts
Gigabit network ports with Integrates PoE, USB, SD card
Strongest possible security protection using SRTP, TLS and HTTPS encryption
Supports any SIP video endpoint that uses the H.264, H.263 or H.263+ codecs