Description:
M-CB-XCB is a portable advanced telecommunication tester used for the installation, maintenance and measurement of ADSL2+ service. It supports the testing function such as parameter, error, DMM, PING, user register authentication on the ADSL2+ user’s line side etc. It also enables the on-site engineers to verify, troubleshoot and evaluate the ADSL2+ service.

Features:
Comply with multi-standards: ITU-T G.992.1(G.DMT), ITU-T G.992.2 (G.Lite), ADSL2(G.992.3), ADSL2+(G.992.5）
Automatically fit for the ADSL line standards, real-time display ADSL line connection status
Support both WAN PING and LAN PING
Support replacing MODEM and simulating the whole process of login on Internet
High resolution backlight large LCD, Handheld design and easy-to-use
Built-in Li rechargeable battery and smart charger circuit.
High storages capacity, can store up to 70 groups of test results including settings and results information.
Various Voice alarm and LED indications
Upgradeable software via an integrated RS-232 interface
Test results uploaded, conserved and printed by PCManager Software

Basic:
Line standard
frame structure
Line connection

Parameter：
Fast Bit Rates (FAST): Upstream and Downstream；
Interleaved Bit Rate (INTL): Upstream and Downstream;
Max Bit Rate: Upstream and Downstream；
Utilize Rate: Upstream and Downstream；
Transmit Power: Upstream and Downstream；
Line Attenuation: Upstream and Downstream；
SNR Margin (Signal to Noise Ratio): Upstream and Downstream；

link：(Near and Far)
Loss of Power (LOP)
Loss of Signal (LOS)
Severe Error frame (SEF)
Reed-Solomon Forward Error Corrections (FEC) INTL
Reed-Solomon Forward Error Corrections (FEC) FAST
Cyclic Redundancy Check (CRC) anomalies INTL
Cyclic Redundancy Check (CRC) anomalies FAST
No Cell Delineation (NCD) INTL
No Cell Delineation (NCD) FAST
Header Error Check (HEC) INTL
Header Error Check (HEC) FAST
Out of Cell Delineation (OCD) INTL
Out of Cell Delineation (OCD) FAST
Sever Error Second (SES)
Error Second (ES)
Bit Error (BE)

Alarm：
Downstream Transmit Speed Threshold
Downstream SNR Margin Threshold
Downstream Channel Threshold
Downstream Line Attenuation Threshold
Upstream Line Attenuation Threshold

DMT:
SNR and Character bits allocation (graphic format) under 256/512 DMT

PING testing:
WAN PING testing: IP or domain ping testing, statistic Percentage of PING packet loss
LAN PING testing: IP PING testing, Find out the faultily connected PC and statistic Percentage of PING packet loss

DMM:
AC, DC voltage
Loop feeding current
Round resistance
Line capacitance
Line insulation capacitance
Estimate line distance