120 channel telephone (point-to-multipoint solution)

According to customer needs, 120 channel automatic telephone numbers are required, and the transmission line requires fiber or 4*2M bandwidth.

Because one 2M bandwidth can only transmit 30 channel telephone, 120 channels / 30 about = 4*2M bandwidth.

120 channel telephone (point-to-multipoint) project:

Description of the program:

Local station: equipped with one ZMUX-3300 centralized PCM multiplexing device, it can realize the access transmission of 1~420 large-capacity telephones, and transmit to each remote station through 4*E1. The ZMUX-3300 centralized PCM multiplexing device can also take into account the continuity and scalability of future services and applications. The central station is equipped with a centralized monitoring system, which can realize the internal telephone test (by monitoring the network management software centrally, testing the communication quality between the PCM equipment and the PCM equipment); it can realize the telephone outside line test (by monitoring the network management software centrally, can test whether the remote telephone is normal or not, the cable between the PCM device and the phone is normal or not.

Remote station: each remote station is equipped with one ZMUX-30 access transmission, and transmits 30 telephones through one E1.

In particularly, the solution is to balance the continuity and scalability of future business and applications.

The sound quality of the telephone interface of the equipment reaches the carrier level, and the three units can ring normally and the sound quality is normal.

Modular design of telephone interface, single-channel card, very convenient for expansion, very convenient for after-sales service replacement module.

The lightning protection circuit is added to each of the telephone interfaces, and the lightning strike resistance is good.