TECHNOLOGY OF SYNCHRONOUS DIGITAL HIERARCHY IS A STANDARD FOR TRANSFERRING OF TRAFFIC
Standard is a level of the transferring speed of synchronous transfer module signals (STM).
VOLZ represents the following advantages of this technology:
At all levels of the system digital hierarchy it is possible to allocate overloaded PDH streams without the use of the complex of demultiplexing.
Customizable network control panel includes 2 ways of distribution of signals with instantaneous switching of the first or second in case of failure.
Synchronous Digital Hierarchy enables multiplex of Japanese, American and European systems of PDH, which will ensure perfect compatibility with existing PDH.
Produces with the support of the large number of broadband control channels and computer control systems.
Switching to the transmission speed which is higher than the present, performed by simple replacement of one functional block to another.
The standards of electrical and optical interfaces are used in a synchronous digital hierarchy.
FOR SELECTION OF THE SOURCES OF SYNCHRONIZATION MAY REPLY BOTH AUTOMATIC PROGRAM AND OPERATOR
Focusing control of networks will ensure a sufficient level of monitoring of the state of channels and nodes. Synchronous digital hierarchy of equipment makes it possible to backup lines and the main technical units for one plus one scheme. Using the ring topology, our experts can set up an automatic channel switching in the case of emergencies or failures in the system by redirecting their backup path.
Thus, network quality is significantly improved, and in case of errors it is possible to fix the equipment - without having to shut down the entire system. In any case, each system can fail due to many factors, but in the case of an emergency, our specialists guarantee a quick solution of the problem, and your system will be switched to the backup stream, which will not interrupt its operation.
Implemented ring topology of SDH transport network and backup of all the elements of the system. When cable is damaged or appears equipment failures, it has the ability of automatically switching to an alternate route without interrupting service, as well as the control of errors directly from the network control center and fixing them.
VOLZ technologies involve the use of cross-switching time slots and methods of time division multiplexing (TDM). According to this, the final equipment of SDH uses streams E1 (2,048 Mbit/s) - to them connects the subscriber equipment. The main network devices are multiplexer s of synchronous digital hierarchy.
An important part of the SDH is the need network the need of synchronization of passing traffic channel between all network elements. Generally, multiplexers can synchronize with any possible external signal, or with own generator of synchronizing pulses, or with PRC. For synchronization on the basis of PRC signal possible spread through the circuit, which will include no more than 15 network elements.