The JWBT820 Explosion-proof VoIP telephone is designed for Emergency communication in the hostile environment. The telephone can afford the large temperature differences, high humidity, sea water and dust, corrosive atmosphere, explosive gases & particles, as well as mechanical wear and tear, making perfect performance as for IP68 defend grade,even with the door open. The body of the telephone is made of Aluminum alloy, a very strong die-casting material, with zinc alloy full keypad features 15 buttons (0-9,*,#, Redial,SOS,Volume control) . Several versions are available, color customized，with stainless steel armored cord or spiral, with or without door, with keypad, without keypad and on request with additional function buttons. Telephone parts is produced by self-made ,every parts like keypad, cradle, handset could be customized.This Explosionproof Telephone is suitable for use in harsh environment: 1.Designed for use in explosive gas atmospheres in Zone 1 and Zone 2. 2.Suitable for IIA, IIB, and IIC explosive atmospheres. 3.Designed for use in dust-prone environments in Zone 20, Zone 21, and Zone 22. 4.Rated for temperature class T1 ~ T6. 5. Oil & gas atmospheres, petrochemical industry,Tunnel, metro, railway, LRT, speedway, marine, ship,offshore, mine, power plant, bridge etc.

Item	Technical data
Explosion-proof mark	ExdibIICT6Gb/EXtDA21IP66T80℃
Voltage	AC 100-230 VDC/POE
Standby Work Current	≤0.2A
Frequency Response	250～3000 Hz
Ringer Volume	>85dB(A)
Corrosion Grade	WF1
Ambient Temperature	-40～+60℃
Atmospheric Pressure	80～110KPa
Relative Humidity	≤95%
Lead Hole	1-G3/4”
Installation	Wall-mounted

1.Support 2 lines SIP, SIP 2.0 (RFC3261). 2.Audio Codes:G.711, G.722, G.729. 3.IP Protocols:IPv4, TCP, UDP, TFTP, RTP, RTCP, DHCP, SIP. 4.Echo cancellation code:G.167/G.168. 5.Supports full duplex. 6.WAN/LAN: support Bridge mode. 7.Support DHCP get IP on WAN port. 8.Supports PPPoE for xDSL. 9.Supports DHCP for IP assignment on the WAN port. 10.Features an aluminum alloy die-casting shell with high mechanical strength and impact resistance. 11.Equipped with a Heavy Duty handset with Hearing Aid Compatibility (HAC) receiver and a noise-canceling microphone. 12.Includes a keypad made of zinc alloy and a Magnetic reed hook-switch. 13.Provides weatherproof protection to IP68 standards. 14.Operational temperature range from -40 degrees to +70 degrees. 15.Coated with UV-stabilized polyester finish in a powder-coated format. 16.Wall mounted, Simple installation. 17.Multiple housings and colors. 18.Self-made telephone spare part available. 19.ATEX,CE, FCC, RoHS, ISO9001 compliantIf you have any color request, let us know the Pantone color No.85% spare parts are produced by our own factory and with matched test machines, we could confirm the function and standard directly.