Brand: Etross or OEM brand
Model No.: Etross-8888
Product name: 4PORTS GSM FWT Fixed Wireless Terminal/GSM gateways
Frequencies: GSM850/900/1800/1900MHz(optional)

Descriptions:
It is a 4 PORTS GSM Gateway that has 4 ports FXS interfaces.
It can connect with ordinary telephone set, PBX or VoIP Gateway,billing system etc.

Features:
Dialing tone frequency: 450Hz
Employ Industrial module  to make
SIM card supported (1.8V, 3V)
Caller ID display
DTMF Dialing
Bell signal
Polarity reversal
The RJ-11 socket which connect the phone or billing system for metering purpose
Antenna socket (SMA)
IP Presetting.
Working status indicator
Signal Strength indicator
Technical Specifications(4CHANNELS GSM FWT)
Air interface standard: GSM900/1800/1900MHz phase 2+ full band

Frequency ranges:
A) GSM 900: GSM 1800:
I) Transmission: 890 ~ 915MHz I) Transmission: 1, 710 ~ 1, 785MHz
Ii) Reception: 935 ~ 960MHz Ii) Reception: 1, 805 ~ 1, 880MHz
Phone interface: Supply RJ-11 Phone Interface
Hanging voltage: 45V
Picking off voltage: 30mA / 41mA
Dialing tone Frequency: 450Hz
Antenna interface: Antenna amplifying>1.5dB
Sensitivity: <-104DBM
Transmitting power<3W
Adapter interface: INPUT: AC 175~260V
OUTPUT: +12V/1000MA

Operation Circumstance:
Operation temperature: -10c~60C
Storage temperature: -20C~70C
Operation humidity: 45%-95%
Atmosphere pressure: 86-106Kpa
Environment noise: <60dB
Transmitting Power: 2W
Sensitivity: <-104dbm
Antenna Amplifying: >1.5dB
Dialing frequency: 450Hz
Hanging voltage: 45V
Picking current: 30mA/41mA