30 channels PCM Multiplexer:PCM-30
Introduce
Introduce
PCM-30 is a type of standard, realizes the integrated access of various operations, such as 30 video channels or date into one 2M digital signal interface. E1 interface compatible with ITU-T G.703. It can be applicable for connecting to the E1 channel of SDH, PDH, satellite, speeding frequency, and digital microwave. The E1 interface can directly change to optical interface, then it can work without PDH, which can be connected with fiber to complete the transmission of 30 channels of analog signals to the remote.
The equipment is 19 inches(1U) in height. The sub-frame of the equipment and the front panel are connected by the magnetic
claspers. The design makes easy the unfolding of the equipment. All of the unit cards in the equipment can be hot swapped and replaced, maintenance, capacity extension and upgrading of the equipment is simple process.
claspers. The design makes easy the unfolding of the equipment. All of the unit cards in the equipment can be hot swapped and replaced, maintenance, capacity extension and upgrading of the equipment is simple process.
All the unit cards have alarm indicators and alarm logic circuit which can indicate all of the faults.If only the indicator is bright that indicate the card works normally. The indicator can be displayed through the panel membrane. The equipment adopts closed connector for various operations. For example, the telephone wire, 2/4 wire EM, RS232 and 10/100Base_T Ethernet interfaces are all RJ45 connectors. E1 uses BNC connector and FC module can be used optic interface.
Power supply can either DC -48V or AC 220V which have their independent Progressive Line Terminal and switch. Two independent power module inside the equipment so that the power can be worked with 1+1 protection. The PCM-30 is able to work in pairs and connect with other PCM30 equipment which made by other manufacturers. Because there are various of selection switches, the demand for clock, frame structure or the position of the signaling bits is able to be set then it can be compatible with the remote one.
The special feature of the equipment is that it is possible to connect with the Program-controlled switchboards to realize picking numbers, it is more convenient than by analog interface. Because the Program-controlled switchboards will cost too much project connection and save plate of the program controlled switchboards. The investment can be also save double. It needn't set a PCM30 at the Program controlled switchboards. No only connecting with Harris and Siemens, but also with Ericsson, however, for most PCM, it can't achieve. It is decided if there is signal process ability in the PCM30.
The network management of PCM-30 is directly connected to the PC or COM interface, The SABIT of the TS0 slot idle BIT in the E1 is adopted to realize the network information of the remote, that is to say, it is not necessary to use other transmission of channel.
Specification
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.
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
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
Transmission type: HDB3
Transmission rate: 2048Kbit/s
Permissible deviation: ±5×10E-5
Impedance at the Flan/Flab: 75Ω
Flan signal amplitude: Us0: 2.37V
2.1 Optical interface
Code rate:2.048Mbit/s
Fiber mode: 9/125um single mode as per ITU-T/G.652 recommendation
Wavelength: 1310nm(1550nm optional)
Transmit power: ≥-3dBm～-15dBm
Receive sensitivity: -38dBm～-44dBm
Receive dynamic range: Full dynamic range -3dBm～-44dBm
Permissible line attenuation: 30dB (60KM)
Physical connector: FC/PC (SC/PC optional)
Port quantity: 2 or 1
Fiber core quantity at each port: 2 or 1 (either double-core or single-core fiber supported)
Code rate:2.048Mbit/s
Fiber mode: 9/125um single mode as per ITU-T/G.652 recommendation
Wavelength: 1310nm(1550nm optional)
Transmit power: ≥-3dBm～-15dBm
Receive sensitivity: -38dBm～-44dBm
Receive dynamic range: Full dynamic range -3dBm～-44dBm
Permissible line attenuation: 30dB (60KM)
Physical connector: FC/PC (SC/PC optional)
Port quantity: 2 or 1
Fiber core quantity at each port: 2 or 1 (either double-core or single-core fiber supported)
3. Channel card
3.1 Subscriber card FXS
Channel quantity per card: 2
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
Channel quantity per card: 2
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: 2
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
Channel quantity per card: 2
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: 2
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
Channel quantity per card: 2
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: 2
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
Channel quantity per card: 2
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
3.5 Data interface card
Channel quantity per card: 2
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
Channel quantity per card: 2
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: 2
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
Channel quantity per card: 2
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: 2
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
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