Physical layer test (current rate, accessible rate, attenuation, noise margin and output power) Determine service quality PPPoE dial & Revise PPPoE dial attribute, user name and password Browse IP address information Replace the user's Modem and dial Determine telephone line faults(break or mix) Memory capacity: 99 records Shut off automatically and backlight timing English menu & simple operation

Functions 1. Common telephone function: Dial, Ring, Talk 2. Mute 3. T/P switch 4. High voltage protection (by fuse) 5. Polarity indication by LED 6. Volume adjust 7. Pause 8. Store phone number 9. Monitoring function 10. Last number redial Features Dumbbell shape design Small size Easy operation Solid new materials for shell Waterproof and vibration proof

FUNCTIONS Common Telephone: Dial, Talk, Redial, Mute, T/P switch Fault Testing: Insulation, Break, Grounding Call & Talk Telephone Testing Monitoring Telecom Line Identifying (Telephone line, ISDN line, ADSL line) FEATURES Dumbbell shape, small size, simple operation Special Lowpass avoiding influencing communication Rechargeable NI-MH battery High DC Voltage protection Against water, shake & fall SPECIFICATIONS Insulation impedance test, Range: 0~10MO Ring distance = 1Km Open resolution distance = 3Km High resistance monitoring, Resistance =1MO Index : GB/T15279-2002 Telecom line identifying distance =5km Battery: rechargeable 9V NI-MH battery DIMENSION & WEIGHT Dimension(mm): 232×73×95 Weight(kg): 0.5 OPERATION ENVIRONMENT Environment temperature: -10?~55? Relative humidity: 10%~95% Environment noise: =60dB Atmospheric pressure: 86~106Kpa ACCESSORIES Main Testing Cord with switch box & clamp × 1 RJ11 Cord

Fault distance location Pulse testing Cable line fault testing (break, mix) Wave shape comparison Testing data record FEATURES High intelligent test, automatic fault distance location Can test telecom cable, coaxial-cable, electric power cable, CAT 5 & 6High sampling speed and automatic resolution testDead zone test distance is less than 1m Low voltage warning, automatic power off and energy-save design Memory capacity of 20 data items Large LCD & Backlight Small size, simple operation

ST800 Optical Power Meter --Ideal handheld Optical Network Tester FEATURE Multi-wavelength precise measurement Absolute power measurement dBm or µW Relative power measurement dB Memory capacity of 100 data items Low voltage warning, automatic power off and energy-save design High contrast backlit display Small size, simple button operation Like all SENTER portable instruments, the ST800 is built for top ruggedness and versatility, perfect for the harshest test conditions. SPECIFICATION Wavelength range (nm) 800~1600 Detector type InGaAs Power testing range (dBm) -45~+25 -70~+3(optional) Uncertainty ±5% Resolution (dBm) Linearity: 0.1% Logarithm: 0.01 General specifications Connectors FC, ST, SC Working temperature (?) 0~40 Storage temperature (?) -10~+60 Weight (

ST332B ADSL2+ Tester is specially designed to meet the urgent requirement of xDSL testing, including ADSL, ADSL2+, READSL as well, it is particularly used by the field operator for telecommunication installation and maintenance. At present, most of the xDSL testers in the market are so complicated which require the operators to occupy rich signal emulation knowledge and network analysis ability. Additionally the prices are generally high. The ISP could only afford a few sets and turn help to the professional network analysis engineer to operate. In fact they are not the suitable equipments for the installation and maintenance operator. With the rapid development of broadband service, the field operators of installation and maintenance have to face much more and complicated workload than ever before, as a result, the equipment which is simple, portable and money-saved is eagerly wanted. ST332B ADSL2+ Tester could not only test physical parameters but also help to judge whether the li

FEATURES: 1. TDR & Intelligent Bridge Measurement Wave shape comparisonBlind zone test distance is less than 1mVisual fault locator (VFL) option for quick and Easy troubleshooting 2. Low voltage warning, automatic power off and energy-save design 3. Large LCD display, backlight display Pulse mode: Maximal range(km): 15 Fault Test types: Line break and mix Test dead zone: <1m Signal source character: >40v Bridge mode: Maximal range (km) Loop impedance <2Kohm(15km for 0.5 core line) Fault Test types: Earthing, immersing, bad insulation Test dead zone: <5m Signal source character: >100V General specifications Display: 114*64 Weight (kg): 0.9 Dimension (mm): 280*175*205 Battery: 7.2V rechargeable Li+ battery Battery working duration (h): 10 Low voltage warning: <9.7V

Functions & Features Multi-wavelength precise test Absolute power test in unit of dBm or µW Adapters supporting different ports (FC, ST, SC) Relative power test in unit of dB Loop test and auto bi-directional test Low voltage warning, auto shut off to save energy Memory capacity of 50 data items High contrast backlit display

ST360 IPTV Tester: Used to test IPTV quality at users' terminal, find faults and test video stream quality Network interface: Xdsl (RJ11), 10M power port (RJ45) 3.5' Color liquid crystal touch screen Support video taking and USB memory Support RFC4445 MDI, PCR, PID, Synchronization Bites, Series count analysis, TDR 101290 the first kind real-time alarm, second, third kind off line analysis alarm Support STB emulation, Modem +STB emulation, Serial connecting mode, STB monitor mode Support MPEG2, MPEG4, H. 264. AVS. VC-1 Support MPEG TS and ISMA Support VLAN, PPPOE, DHCP, IPv4, IGMP, UDP, TCP, RTP agreements.

DB08F/16F/32F Cable theft-proof & alarm locator(“ Locator” in abbreviation)is a new generation theft-proof system. It keeps the advantages of the previous version and has been revised some bugs appeared in practices. They are a serial of perfect intelligent equipments which transmit the alarm message through telephone line. The locator has adopted the loop test principle and cable distance test theory which can realize the alarm and location of the monitored cable by the control of computer. If a cable is open the locator will start the distance test function and display the distance of open spot. Synchronously it will also give out a sonorous alarm signal and point out the open cable number. And the on-line locator will transmit the alarm message to the concentration monitor mainframe and send the alarm voice to principal’s telephone or mobile phone. The locator can monitor 8/16/32 cables at best. And its longest test distance is 28 Km while the error will be less than 5%. As th

Assist xDSL service evaluation Modular platform design Remote software upgrade WINCE display interface Touching operation FUNCTIONS xDSL Test LAN Test DMM Test MODEM Emulation Webpage Browse Webpage Speed Test (new) FTP Client (new) Test Record Management System Software Upgrade PARAMETERS Chip Set: Globespanvirata Relevant Standards: ANSI T1.413 ITU-T G.992.1 (G.DMT) ITU-T G.992.2 (G.Lite) ITU-T G.992.3 (ADSL2) ITU-T G.992.5 (ADSL2+) Up channel speed (Mbps):0~24 Down channel speed (Mbps):0~1.2 ADSL Physical Analysis Noise margin (dB): 0~32 Attenuation (dB): 0~63.5 Upstream rate (Mbps): 0~24 Downstream rate (Mbps):0~1.2 The max test distance: 6.5 km DMT sub channel bit number0~15 State display: Signal loss, connection close. DSL line local output power DSL line error number (CRC?HEC?FEC?NCD?OCD) DMM Test AC & DC voltage (V): 0~400 Loop resistance(O): 0~20000 Capacitance (nF): 0~1000 Insulation resistance (MO):0~50 OTHER PARAMETERS

ST230 Line Tester It integrates various kinds of functions such as telephone and line test to be the one. FEATURES ? CID function, FSK/DTMF compatibility ? DTMF applying to GB/T15279-94 ? Dialing number display, incoming calling number display ? Checking wire pairs function ? Dangerous high voltage alarm ? Low voltage warning, automatic power off and energy-save design ? Small size, simple operation Telecommunications Test and Measurement www.senter.com.cn SPECIFICATIONS DC V test Range (V) 0~260 Error ±5% Insulation impedance test Range (MO): 0~10 Range (MO): 10~30 Error: =±5%±0.1 MO Error: =±10% ±0.5MO General specifications Ring distance (Km) = 2 Open resolution (Km) = 2 Monitoring resistance (MO) =1 Temperature (?) -10~55 Weight (kg) 0.5 Dimension (mm) 232×73×95 Battery Rechargeable 9V NI-MH battery Relative humidity 10%~95% Environment noise (dB) =60 Atmospheric pressure (Kpa) 86~106