Brand: Voptech
Model: VG4X-32O
Type: VoIP Gateway
General: SIP (RFC3261) UDP, TCP for Microsoft Lync; IMS
Network: Telnet, SSH, HTTP, DHCP Client, PPPoE Client, Radius, DNS
Caller ID: Bellcore Type 1&2, ETSI, BT, NTT, and DTMF-based CID
Codes: G.711a/mu, G.729A
DTMF: Transparent transmission, RFC2833, SIP-INFO, Hook-flash events
Fax over IP: T.38 compliant Group 3 Fax Relay up to 33.6kbps and auto-switch to T.38 from G.711 Fax pass-through
Fax Data Pump: V.17, V.21, V.27ter, V.29, V.34 for T.38 fax relay
Support: Smart Fax over IP (SFoIP) to make fax event more reliable
CPU: ATMEL AT91SAM9G20
Digital signal processing: TI TMS320VC5509A
System memory: 64MB Flash memory: 8MB
Ethernet connector: RJ-45, 10/100 Base-T, automatic crossover
FXS/FXO connector:  RJ-45 ( 4line pairs following T568B scheme)
Max. user line length:  1500 meters Ring equivalent value: 5 (short distance)
Power input: 100～240 AC, 50/60 HZ, 1A (Max)
Power consumption:  75W (Max)
Dimension (H x W x D): 44 x 440 x 260 mm
Weight Net: 3Kg
Gross (include package): 4Kg
Operating Temperature: 0～40ºC.
Humidity: 10%～90% (non condensing)
Non operating Temperature: -10～60ºC.
Humidity: 5%～90% (non condensing)
Warranty: 1 Year