Grandstream IP Telephony system (2,4,8 Lines)

Grandstream IP Telephony system (2,4,8 Lines)

* UCM6202 and UCM6204 support up to 500 users 
            and 50/75 concurrent calls
* UCM6208 supports up to 800 users and 100 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
* Supports up to a 5-level IVR (Interactive Voice Response)
* Built-in call recordings server
* Supports any SIP video endpoint using H.264, H.263 or H.263+