Hong Telecom Equipment Service LTD

The H805ADIF board is a 32-port ADSL2+ over ISDN service board. It works with the  ADSL terminal unit-remote end (ATU-R) through the ADSL2+ port to provide 32 channels of ADSL2+ signals. Working principle of the H805ADIF board: The basic working principle of the H805ADIF board is as follows: * The control module loads the board software, controls the running of the board, and  manages the entire board. * The protection module protects and isolates the board from lightning strikes. The DC  block isolates the direct current. The protector protects the high voltage. * The interface module supports two functions: – In the upstream direction, the interface module converts line signals into a cell flow,  aggregates the flow to the forwarding module, and then reorganizes the flow into  ATM packets. – In the downstream direction, the forwarding module transmits the ATM cell flow to  the interface module. Then, the interface module converts the flow into do...

Networking and applications Data Center Applications On a typical data center network, CE12800/CE8800/CE7800 switches work as core switches, whereas CE8800/CE6800/CE5800 switches work as ToR switches and connect to the core switches using 100 GE/40 GE/10 GE ports. These switches use TRILL or VXLAN protocol to establish a non-blocking large Layer 2 network, which allows large-scale VM migrations and flexible service deployments. Note: TRILL and VXLAN can be also used on campus networks to support flexible service deployments in different service areas. Campus Network Applications On a typical campus network, multiple CE12800/CE8800/CE7800 switches are virtualized into a logical core switch using CSS or iStack technology. Multiple CE8800/CE7800/CE6800 switches at the aggregation layer form a logical switch using iStack technology. CSS and iStack improve network reliability and simplify network management. At the access layer, CE6800/CE5800 switches are virtualized with SVF to...

The CloudEngine 12800 (CE12800 for short) series switches are next-generation, high-performance core switches designed for data center networks and high-end campus networks. Using Huawei’s next-generation VRP8 software platform, CE12800 series switches provide stable, reliable, and secure high-performance L2/L3 switching capabilities to help build an elastic, virtualized, and high-quality network. The CE12800 series switches use an advanced hardware architecture design and have the highest performance among all core switches in the industry. The CE12800 series provides as much as 178 Tbit/s (scalable to 1,032 Tbit/s) switching capacity and has up to 576 x 100 GE, 576 x 40 GE, 2,304 x 25 GE, or 2,304 x 10 GE line-rate ports. The CE12800 series switches use an industry-leading Clos architecture and provide industrial-grade reliability. The switches support comprehensive virtualization capabilities along with data center service features. Their front-to-back airflow design suits data ce...

An AC-powered cabinet uses the ETP4890 power system to convert the AC power to the DC  power for power distribution. The small and modular ETP4890 power system supports easy  installation and maintenance and effective LCD interface management. The power system  supports a maximum of 90 A output current. The ETP4890 power system supports the following functions: * Converts AC power to DC power and provides the DC power for communication devices. * Communicates with the upper device using a COM or an RS485/RS232 serial port; sends  control signals based on the values of monitored parameters or the control command sent  by the upper device; detects power distribution parameters, power supply module  parameters, and auxiliary digital parameters in real time. * Connects to one to two groups of lead acid batteries and uses a monitoring module to  manage the batteries; provides complete management for battery charging and discharging,  ensuring ef...

SDH OptiX OSN 7500 II PDH Boards below: The PDH boards include the PDH service interface boards and PDH service processing boards, to transmit/receive and process E1/T1 signals, E3/T3 signals, E4/STM-1 electrical signals, and DDN signals. PQ1 (63xE1 service processing board). PQM (63xE1/T1 service processing board). PQ3 (12xE3/T3 service processing board). DX1 (DDN service accessing and converging board). SPQ4 (4xE4/STM-1 electrical processing board). D12B (32xE1/T1 access board). D12S (32xE1/T1 switching access board). D75S (32xE1 switching access board). D34S (6xE3/T3 switching access board). MU04 (4xE4/STM-1 electrical interface board). DM12 (DDN service interface board). TSB8 (8-channel electrical interface protection switching board). 1 Relationship between the feature code of the PQ1 and the type of interface impedance Board Feature Code Type of Interface Impedance SSN2PQ1A01 A01 75-ohm SSN2PQ1B01 B01 120-ohm 2 Function...