QL-200GTA G.SHDSL

1. Product Overview

QL-200GTP/N is G.SHDSL modem complying with ITU-T Rec. G.991.2 standard, supporting single pair or two pairs copper wire transmission with TC-PAM modulation, data rate ranges from 64 Kbps to 11392 Kbps in 64 Kbps increments. Two models are available:

•          QL-200GTN: Equipped with DIP switch panel for simple configuration

•          QL-200GTP: Equipped with 2×16 character LCD panel for visual operation

It integrates multiple service interfaces including E1, V.35 and Ethernet, which can share DSL loop bandwidth and work simultaneously. Embedded EOC channel enables remote unit monitoring, G.SHDSL/E1 line performance monitoring, local & remote loopback and real-time alarm. The device supports STU-C (Central office unit) and STU-R (Remote unit) modes, widely used for point-to-point symmetric data transmission over dedicated lines.

Order Information Code Rule

QL-200GTP/N i1-i2-i3

•          i1: DSL line mode, P1=Single Pair SHDSL, P2=Two pairs SHDSL

•          i2: User interface type, optional E1 75Ω, E1 120Ω, E1 120Ω/64KCOD, E1 120Ω+V35, V35

•          i3: LAN port quantity, L1=1 LAN port, L2=4 LAN ports

Example: QL-200GTP P2-i4-L2 stands for two pairs SHDSL, 120Ω E1+V35 interface, 4 Ethernet ports, LCD control panel model.

2. Key Features

1.       Fully compliant with ITU-T G.991.2 Annex A/B, programmable 16 TC-PAM / 32 TC-PAM modulation

2.       Flexible bandwidth: single pair max 5696 Kbps, two pairs max 11392 Kbps, N×64Kbps adjustable rate

3.       Multi-service integration: E1, V.35 and Ethernet run concurrently with time slot allocation on one unit

4.       Multiple management modes: DIP switch, LCD panel, Web, Telnet and SNMP for configuration & maintenance

5.       Comprehensive diagnostic tools: local/remote loopback, ITU-T V.54 in-band loopback, PRBS BER test, self-test

6.       Performance data storage: 96×15 minutes and 7×24 hours performance records to store error statistics and alarms

7.       Remote maintenance via EOC in-band channel: remote parameter configuration, firmware upgrade and fault diagnosis

8.       Wide voltage & temperature design: AC 90260V / DC -36-72V dual power supply, operating temperature 0~60°C

3. Panel & Interface Description

Available Interfaces (Optional by Order)

•          DSL copper port: RJ45, single/two pairs, impedance 135Ω ±5%, compatible with 0.4/0.5/0.65 mm diameter copper cables

•          E1 interface: 75Ω unbalanced BNC / 120Ω balanced RJ45, HDB3 encoding, supports PCM30/PCM31/unframed mode

•          V.35 data port: DB26F connector, compatible with V.36/RS449/RS-530/X.21, matched with DB26M to MR34 adapter cable

•          Ethernet port: IEEE 802.3 10/100 Base-T auto-negotiation RJ45, IEEE 802.1d transparent bridge, supports up to 128 MAC addresses learning

•          Power & management: AC/DC power switch, EMS management LAN port

Front Panel LED Indicators

Operation Panel Difference

•          QL-200GTN: Front DIP switches for quick settings of data rate, E1 frame format, Web switch, timing/data polarity inversion

•          QL-200GTP: 2×16 LCD screen with control buttons, real-time display of CO/RT mode, DSL synchronization status, connection rate and SNR; auto key lock after 3 minutes idle

4. Full Specifications

G.SHDSL DSL Interface

•          Standard: ITU-T G.991.2 Annex A / Annex B selectable

•          Modulation: programmable 16 TC-PAM or 32 TC-PAM

•          Line rate: Single pair 192 Kbps ~ 5696 Kbps; Two pairs 384 Kbps ~ 11392 Kbps, step 64 Kbps

•          Loop impedance: 135Ω ± 5%

•          Wetting current: 1.0 mA ~ 20 mA

•          Timing mode: Plesiochronous, Synchronous, Hybrid

E1 (G.703) Interface

•          Rate: 2048 Kbps ±50 ppm, HDB3 line code

•          Data bandwidth: N×64 Kbps (N=1~32), supports partial E1 transmission

•          Frame format: PCM31, PCM30, PCM31C, PCM30C, unframed

•          Impedance: 120Ω balanced or 75Ω unbalanced

•          Jitter & wander: comply with ITU-T G.823, G.824

V.35 Data Port

•          Programmable interface type: V.35/V.36/RS-530/X.21

•          Data rate: 64 Kbps ~ 2048 Kbps, N×64 Kbps

•          Adjustable transmit clock, receive clock, TX/RX data polarity

•          Complete control signals: CTS, DSR, RTS, DCD, DTR

Ethernet Interface

•          Standard: IEEE 802.3 / IEEE 802.3u 10/100 Base-T

•          Auto speed & duplex negotiation, IEEE 802.3x flow control

•          Transparent bridging with MAC address filtering function

Electrical & Mechanical

•          Power input: AC 90 ~ 260 V (47 ~ 63 Hz) / DC -36 ~ -72 V

•          Power consumption: less than 6 Watts

•          Dimension: 234.4 x 155.5 x 44.2 mm (W x L x H)

•          Operating environment: 0 ~ 60°C, relative humidity up to 95% non-condensing

5. Main Functions

Multi-mode Configuration Management

Three configuration methods:

1.       DIP switch for basic quick setup (QL-200GTN only)

2.       Local visual operation via LCD panel (QL-200GTP only)

3.       Remote management via Web/Telnet/SNMP, default IP: [192.168.0.1](192.168.0.1), default username & password: admin/admin

Configurable parameters: STU-C/STU-R mode, single/two pairs DSL mode, TC-PAM mode, PBO power backoff value, E1 frame format, bandwidth allocation for each service, clock source, SNMP trap IP, Web switch, interface signal polarity inversion.

Performance Monitoring & Alarm System

1.       Real-time line data viewing: SNR margin, loop attenuation, ES, SES, UAS, LOSW

2.       Customizable alarm thresholds for DSL and E1 on 15-minute and 24-hour cycles

3.       Alarm record storage: current active alarms and historical alarms with port, alarm type, alarm time & clear time

4.       Long-term performance statistics storage in 15-min and 24-h intervals, data clearing supported

Complete Maintenance & Diagnostic Tools

1.       Loopback test: LA near-end local loopback, LD local payload loopback, RA near-end remote loopback, RD remote payload loopback for fault isolation

2.       ITU-T V.54 in-band loopback: cross-device remote port diagnosis, target address range 0~255

3.       PRBS BER test for DSL, E1 and V.35 line error detection

4.       Device self-test to automatically check DSL, E1 and data port hardware status

5.       Real-time DP control signal display to view all V.35 DTE/DCE control signals

6.       Device inventory query: software version, FPGA version, hardware version, serial number, manufacture date

7.       Remote firmware & FPGA upgrade via Web, support factory default configuration recovery

Clock Synchronization Options

5 selectable clock sources: Internal clock, E1 input timing, DTE data port timing, recovered clock, external clock to match various network synchronization requirements

6. Typical Application Scenarios

1.       Point-to-point dedicated line transmission for enterprises: long-distance E1 voice and private network symmetric data transmission for branches and campuses

2.       Industrial remote networking: long-distance copper cable extension for factory equipment and surveillance Ethernet

3.       Telecom backhaul, PDH/SDH access extension, cross-site symmetric high-speed data interconnection