Intelligent 120 Channels PCM Multiplexer:PCM120

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Intelligent 120 Channels PCM multiplexer:PCM120
cenny.xu[at]hotmail.com

The PCM120 equipment can multiplexes 120 channels into 4-16 E1 data, and cross- connect all of the time slots through the network management software. The 120 channels of voice can cross-connect to any E1.

All the units cards could be of any interface cards, such as, S interface card, O interface card, 2/4 EM interface card, asynchronous data interface  card, synchronous data interface card, carrier magnet interface card, Ethernet interface card, and so on.

There are interface cards of 3 capacities for choice:  15 channels/card, 10 channels/card, 5 channels/card, 4 channels/card, 3 channels/card.

All stainless steel, with aluminum alloy. 19 inches in width, 6U in height. Totally 18 unit cards, the most left and the most right channels are the power supplies to make 1+1 protection. 4 channels in the center for the MUX, other 12 channels for the unit cards.

Multiple protections have been applied for safety and reliability. There are lightening proof, anti-magnet anti-surge protections for the equipment. Each working circuit has its own power supply and recoverable fuse so that any error happening on single unit will not affect others. The enclosed construction of connectors prevent short circuits caused by external metals.

4E1 multiplex and cross connect card with 2 channels V.24/RS232 interfaces, and 2 channels of NX64Kbit/s V.35 interfaces.

Various of voice interfaces and data interfaces
The general performance complies with ITU-T G.703, G.711, G.712, G.713,
G.714, G.732 recommendations, etc.

1.   General characteristics
Transmission technique: Pulse code modulation (PCM)
Group interface: E1
Gross bit rate: 2.048Mbit/s±50ppm
Sampling frequency: 8KHz
Frame time slot quantity: 32
Quantity of channel: 30/31
Bit rate per time slot: 64Kbit/s
Signaling: TS16, compliant to ITU-T\REC\G.704, the specification of TS16 time slot
signaling code

2.    2Mbit/s interface E1
Transmission type:  HDB3
Transmission rate:  2048Kbit/s
Permissible deviation:  ±5×10E-5
Impedance at the Flan/Flab:  75Ω
Flan signal amplitude: Us0:  2.37V

3. Channel card

3.1Subscriber card FXS
Channel quantity per card: 5
Standard referred to: ITU-T\REC\Q.552
Frequency range: 0.3~3.4KHz
Idle channel noise: <-65dBm0vv
Cross talk: <-65dBm0
Transmit relative level: +3,0, -3dBr adjustable
Receive relative level: +3,0, +3dBr adjustable
Maximum recognizable pick-up loop resistance: 2.4KΩ
Input impedance: 600Ω
Constant current mode: 22mA~28mA
Ringing generator voltage: 75V(full load≥50V)
Ringing frequency: 25Hz ±10%
Subscriber physical connector: RJ45

3.2 PABX card FXO

Channel quantity per card: 5
Standard referred to: ITU-T\REC\Q.552
Frequency range: 0.3~3.4KHz
Idle channel noise: <-65dBm0
Cross talk: <-65dBm0
Transmit relative level: +3,0, -3dBr adjustable
Receive relative level: +3,0, +3dBr adjustable
Input impedance: 600Ω
Broken loop impedance: >100KΩ
Cyclization direct current impedance: 470Ω
Ring current detection level: 35V~100V
Ringing frequency received: 16Hz ~66Hz
Subscriber physical connector: RJ45

3.3 2/4 wire E&M interface card
 
Channel quantity per card: 5
Standard referred to: ITU-T\REC\G.714
Transmit relative level: +3,0, -3dBr adjustable
Receive relative level: +3,0, +3dBr adjustable
Signaling mode: E&M
Interface impedance: 600Ω
Subscriber physical connector: RJ45

3.4 Data interface card

Channel quantity per card: 5
Standard referred to: ITU-T\REC\G.714
Compliable with RS232, RS422/RS485 data interfaces
Interface transformation mode: hardware lapping
Asynchronous data channel V.24/RS232 interfaces
Quantity of signal line per RS232 channel: 3—receive, transmit and ground
Logic level: 0=+10V, 1=-10V
Transmission rate: 0 to 19.2Kbps
Asynchronous sampling rate: 64KHZ
RS232 interface static protection: available
RS232 interface protection voltage: ±10V
Asynchronous data channel V.11/RS422/485 interfaces
Signal line amount:  4
Transmission signal (input) detection capacity: Ua-Ub>0.07V
Receiving signal (output) level: Ua-Ub=5V(zero loaded) Ua-Ub=2.5V(loaded)
Transmission rate: 0 to 19.2Kbps
Subscriber physical connector: RJ45

3.5Data interface card
Channel quantity per card: 5
Interface code type:  AMI bipolarity reverse code
Data rate:  64Kbit/s
Clock frequency:  64KHZ ±50ppm
Compliant to ITU-T G.703 64K reverse data interface
Subscriber physical connector: RJ45

3.6 LB interface card
         
Channel quantity per card: 5
Frequency range:  0.3~3.4KHz
Idle channel noise:  <-65dBm0
Channel cross talk:  <-65dBm0
Transmit relative level: +3,0, -3dBr adjustable
Receive relative level: +3,0, +3dBr adjustable
Interface impedance:  600Ω
Ringing generator voltage: 75V (full loaded≥50V)
Ringing frequency: 25Hz ±10%
Ring current detection level: 35V~100V
Receive ringing frequency: 16Hz ~66Hz
Subscriber physical connector: RJ45

3.7  2100HZ carrier magnet interface card

Channel quantity per card: 5
Idle channel noise:  <-65dBm0
Channel cross talk:  <-65dBm0
Transmit relative level: +3,0, -3dBr adjustable
Receive relative level: +3,0, +3dBr adjustable
Interface impedance:  600Ω
Ringing generator voltage: 75V (full loaded≥50V)
Ringing frequency: 25Hz ±10%
Ring current detection level: 35V~100V
Receive ringing frequency: 16Hz ~66Hz
Receive 2100HZ signal frequency range: 2100HZ±10HZ
Transmit 2100HZ signal frequency: 2100HZ±5HZ
Signal repression of signaling detection circuit: >28dB
Receive signal repression of transmit channel: >45 dB
Subscriber physical connector: RJ45

3.8  V.35 interface

Clock mode: DCE clock (master) or DTE clock (attraction DTE clock) selectable
Data rate: Nx64Kbit/s, N=1-32
Frame rule: unframed/framed
PCM30/31: configured as PCM30 or PCM31
Occupancy time slot mode: discrepancy
Physics connector: RJ45
Output data signal and input signal mode: differential
Output data and clock signal level: RDA-RDB=2.5V到5V (loaded/zero loaded)
Recognizable input data and minimum clock signal level:  TDA-TDB=0.2V
Signaling communication signal content:  RTS, CTS, DSR, DCD, DTR, RI
Signaling communication signal level:  V24 level (RS232 level)
Signaling communication mode:  optional, auto-adaptation DTE equipment

4.  Power supply and operation environment

Input voltage range: -36V…-72V DC
Maximum output power: <20W
Performance temperature: 0℃~+40℃
Operation temperature: -10℃~+45℃
Storage temperature: -40℃~+60℃
Performance humidity: 10%~90%ï¼Âˆ+35℃ï¼Â‰
Operation temperature: 5%~95%ï¼Âˆ+35℃ï¼Â‰
 
5.  Mechanic parameters           
Dimension: 485×45×300mmï¼Âˆ19 inches wide, 6U highï¼Â‰
Weight: ≤10Kg

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