Multi-service integrated PCM multiplex equipment is the optical integrated product independently researched and manufactured by our company with the special integrated circuit. This equipment takes the large-scale integrated circuit and programmable logic chip as the core to form PCM integrated access product of speech channel interface (FXS), exchange interface (FXO), 2/4-wire audio frequency, E/M, RS232, RS422, Ethernet, V.35 and other interfaces.

　This equipment has the rich speech channel signaling interface and data interface, and strong compatibility. It not only can implement the matching use with the transmission equipment, low-speed voice data multiplexer, data terminal and other products manufactured by our company, but also connect to use with many types of equipments that have related interfaces, which are manufactured by other manufacturers.

Network Program

Point-to-point network program

Main Characteristics：

Adopt large-scale integrated chip, simple circuit, low power dissipation and high reliability
It provides 1-way E1 interface, impedance 75Ω;
It can provide 30-way automatic telephone interface (FXS) or exchange interface (FXO) at most;
It can provide 30-way official telephone interface at most, namely two terminals are respectively configured as the automatic telephone interface (FXS);
It can provide 30-way RS232 interface at most;
It can provide 30-way RS422 interface at most;
It can provide 2-way Ethernet interface at most;
It can provide 1-way V.35 interface ;
It provides 1-way network management interface, the function of which is strong and supports the upgrade of system;
Audio interface kind:
8-way automatic interface （FXS）
8-way E/M interface (E/M) （FXO）
8-way E/M interface (E/M) （E/M）
4-way automatic interface （FXS）+4-way exchange interface （FXO）
4-way exchange interface （FXO）+4-way E/M interface (E/M) （E/M）
4-way automatic interface （FXS）+4-way E/M interface (E/M) （E/M）
4-way automatic interface （FXS）
4-way exchange interface （FXO）
Plus and time slot of audio interface are adjustable;
Perfect management control system: it can log on this machine to implement the operation and setting through super-terminal of WINDOWS system, and also can implement the uniform management through HHCTC network management system;
Provide network management system of strong functions;
Applied to multiple power supply environment -48VDC/220VAC；

Technical Parameters:
E1 interface
Interface rate：2048Kbit/s±50ppm；
Interface code pattern：HDB3；
Interface impedance: 75Ω (imbalance)
Electrical characteristics of digital interface: conform to ITU-TG703 suggestion
Digital Structure：conform to ITU-T G.704 suggestion:
Access attenuation: the attenuation is between 0dB and 6dB at 1024KHz
Jitter transfer characteristics：conform to ITU—TG.823 suggestion；
Input jitter tolerance：conform to ITU—TG.823 suggestion:
Output jitter：conform to ITU—TG.823 suggestion:
Speech channel interface
form: automatic (FXS), exchange (FXO) and E/M (2/4W)
Interface Type ：RJ-11
Voice sampling frequency：8KHz
Audio interface index ：
a. Impedance characteristics ：600Ω balance (2/4-wire)
b.level
4-wire audio input level: -5dBr Allowable deviation ±1dB
4-wire audio output level: -5dBr Allowable deviation ±1dB
2-wire audio dispatch level: -0dBr Allowable deviation ±1dB
2-wire audio receive level: -3dBr Allowable deviation ±1dB
c.Audio transfer point impedance echo attenuation
2-wire： bp≥12dB(300~600Hz)
bp≥15dB(600~3400Hz)
4-wire dispatch： bp≥20dB(300~3400Hz)
4-wire receive： bp≥20dB(300~3400Hz)
d.Code：A-law
e.Bit rate：64Kbit/s
f.Maximal impedance of DC loop：2000Ω
g. Effective transmission bandwidth：300－3400HZ/600Ω
h.Idle channel noise：＜－67dB
i. Ringing current voltage：25±3Hz，75±15V
j. Net attenuation frequency characteristics: meet the demand of ITU-T suggestion
k. Idle speech channel noise: not more than -65dBm0p
l. Interchannel crosstalk: not more than -65dBm0
m.Amplitude characteristics: meet the demand of ITU-T suggestion
n.Total distortion ： meet the demand of ITU-T suggestion
RS232 interface
Interface rate：≤19200bit/s；
Distributed work：DCE；
Interface type：RJ-11；
Electrical characteristics: conform to the demand of ITU-T V series suggestion and other related suggestion
RS422 interface
Distributed work：DCE；
Interface type：RJ-11；
Electrical characteristics: compatible RS-232C and RS-485/422 standards of ELA/TIA
10Base-T interface
Interface rate ：10/100Mbit/s self-adapting；
Interface order： conform to IEEE-802.3u suggestion；
Interface type：RJ-45；
Support VLAN Ethernet frame transparent transmission;
Maximal rate of filtering or transmitting is 15,000 frames per second;
Increased TINYGRAM compression mode;
10,000 MAC address LAN table;
V.35 Interface
Nominal rate ：N×64Kbit/s（N=1-31）；
Interface electrical performance conforms to V.35/V.11 demand;
Interface type: DB25 hole seat (equipped with DB25 to M/34 switching cable );
Distributed work：DCE；
Failure monitoring
Major alarm: code loss, out of frame, out of multi-frame;
Minor alarm: remote alarm and loopback indication.
Ringing current
Ringing current output：75V±15V
Power supply conditions
Voltage： AC 220V AC 180V～240V；
DC-48V DC -36V～-72V；
Power：≤10W
Working environmen
Working temperature：0℃ ～ 50℃；
Storage temperature：-40℃ ～ +70℃；
relative humidity：5% ～ 95% ；
Atmospheric pressure：86 ～ 106Kpa；
External dimensions
19-inch standard type：483×260×45m