Network Program

Integrated PCM point to multi-point scheme drawing

Main Characteristics：

Adopt large-scale integrated chip, simple circuit, low power dissipation and high reliability;

Provide 17 slots, 1 network management tray slot and 16 service slots at most;

Provide 2 power supply slots, which support the dual backup of power supply;

Dual power supply not only provides 2-channel AC 220V power supply backup and 2-channel DC -48V power supply backup but also one-way AC & one-channel DC power supply backup;

Mixed insertion of plugboard, various service plugboard: V.35, V.24, RS232, FXO, FXS, E/M, 2M and DXC plugboard;

Provide network management system of strong functions;

Applied to multiple power supply environment -48VDC or 220VAC;

Technical Parameters:
E1 interface
Interface rate: 2048Kbps, tolerance±50ppm;
Interface code pattern ：HDB3；
Interface impedance: 75Ω (imbalance)
Electrical characteristics of digital interface: conform to ITU-TG703 suggestion
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；
Level ：±2.37V±10%；
Interface connector: DB37 equipped with DB37-BNC switching cable;
100M Ethernet interface
Interface ：10/100Base-Tx；
Interface specification: conform to IEEE-802.3u standard

Interface rate: 100M
Adaptive pattern ： 10/100M self-adapting
Interface type ：RJ-45；
N×64K Ethernet interface
Interface：10/100Base-T；
Interface specification: conform to IEEE-802.3u standard

Interface rate：N×64Kbit/s；
Adaptive pattern：10/100M self-adapting；
Interface type：RJ-45；
Applicable card: YKDH8E Ethernet service plugboard
Network management interface
Interface ：10Base-T；
Interface specification: conform to IEEE-802.3u standard

Interface type：RJ-45；
Based on protocol ：TCP/IP；
RS232 interface
Interface rate： ≤19200bit/s
Interface level：RS232 level；
Distributed work：DCE；
Interface type：RJ-45；
Applicable card: it is applied to various optical transmission equipment card and YKDH16RS RS232 service interface card;
V.35 interface
Interface rate：2048Kbit/s；
Distributed work：DCE；
Interface type：DB37（ simultaneously equipped with one converter cable of DB37—M34 standard ）；
Applicable card ：YKDH8V V.35 service interface card ；
V.24 interface
Interface rate：N×64Kbit/s(N=1、2)
Distributed work：DCE；
Interface type：DB37（ simultaneously equipped with one converter cable of DB37—M25 standard ）；
Applicable card： YKDH8A V.24 service interface card；
Audio interface
Interface form: automatic (FXS), exchange (FXO) and E/M (2/4W)
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 audiooutput level: -5dBrAllowable 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
Official telephone
Physical interface ：RJ-11；
Provide one-channel PCM service telephone, which can connect to the common handle telephone
Applicable card: it is applied to various optical transceiver service cards;
Power supply conditions
Voltage： AC 220V AC 180V～240V；
DC-48V DC -36V～-72V；
Power： Each card ≤5W；
All power：≤100W；
Working environmen
Working temperature ：0℃ ～ +50℃；
Storage temperature ：-40℃ ～ +70℃；
relative humidity ：5% ～ 95%；
Atmospheric pressure ：86 ～ 106Kpa；
External dimensions
19-inch standard type 483×350×180 mm
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