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BBPCM30 has 1×E1 ports, transmitting 30 signal channels through electrical or optical interface. 2-wire voice data, 2/4 E&M data, RS232 data, V.35 data as well as 10 Bast_T supported. The transmission rate of 10 Base_T and V.35 is adjustable by N×64Kb/s. These services share 1 E1. BBPCM30 is special for 2M transportation agency of small vlolume of information processing, but multiple services. Its front panel can be turned over and the expansion cards is hot-plugged. Multiple power supplies for stable working.


BBPCM30 has 16 card slots. The right slot is MUX card slot and the other 15 slots are all extension card slots. Each signal processing slot holds two channels of signal.

BBPCM30 Signal Processing Slot List
Module Introduction
BBPCMMUX MUX unit. Including power unit and ringing generator.
BB751 2 channels/card, FXS
BB752 2 channels/card, FXO
BB756 2 channels/card, 2/4 wire E&M
BB747 2 channels/card, V.11/V.24/V.35 ports, Data Synchronous 64Kb/s, Asynchronous 9.6Kb/s


Frame Parameter

The framework of BBPCM30 is aluminum; 19 inch external width; 1U height; 30cm length.

This equipment can be located on any stable base, and can be also screwed through mounting hole to 19 inch cabinet.


Port Physical Parameter

Name Description
E1 port L9 coaxial connector
extension card port RJ-45
NM port RJ-45

Port Electrical Parameter

Technical features of BBPCM30 meets ITU-T G.703、G.711、G.712、G.713、G.714、G.732.

System Features

Transmission technique: PCM
Group Interface: E1
Gross bit rate: 2.048Mbit/s±50ppm
Sampling Frequency: 8KHz
Frame Time Slot Amount: 32
Channel Amount: 30
Bit Rate of Time Slot: 64Kbit/s
Signalling Signal: TS16
compliant to ITU-T REC\G.704
Frame Alignment Signal: TS0

2Mbit/s Interface(E1)

Transmission Type: HDB3
Transmission Rate: 2048Kbit/s
Permissible Deviation: ±5&time;10E-5
Impedance at E1 Interface: 75Ω
E1 Signal Amplitude: 2.37V


Ports per Card: 2
Standard Referred to: ITU-T\REC\Q.522
Frequency Range: 0.3∼3.4KHz
Idle Channel Noise: < -65dBm0
Cross Talk: < -65dBm0
Relative Level Transmitted at F2an:
                  +3,0,-3dBr adjustable
Relative Level Received at F2ab:
                  +3,0,-3dBr adjustable
Max Loop Impedance: 2.4KΩ
Loop Feeding:
Loop Current: 22mA∼28mA
Ringing Generator Voltage:
                  75V(full load≥50V)
Ringing Frequency: 25Hz±10%


Ports per Card:2
Standard Referred to: ITU-T\REC\Q.522
Frequency Range: 0.3∼3.4KHz
Idle Channel Noise: < -65dBm0
Cross Talk: < -65dBm0
Relative Level F2an: 0dBr
Relatvie Level F2ab: -3dBr
Loop Resistance: 470Ω
Audio Impedance: compound
Ring Current Detection Level:35V∼100V
Receive Ringing Frequency: 16Hz∼66Hz

2/4 wire E&M

Ports per card: 2
Standard Referred to: ITU-T\REC\G.714
Signaling Mode: E&M
Audio Impedance: 600Ω
Transmission Relative Level at F2in:
-17.4∼+7dBr adjustable, 0 dBr initially
Receiving Relative Level at F2out:
-17∼+7dBr adjustable, 0 dBra initially

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%(+35℃)
Operation Humidity: 5%∼95%(+35℃)

Data Interface Card

Port per Card: 2
Asynchronous Data Channel V.24/RS232
Logic Level: 0=+10V,1=-10V
Transmission Rate: 0∼19.2kbit/s
Sampling Rate: 64KHz
Interface Static Protection: Available
Interface Protection Voltage: ±10V
Asynchronous V.11/RS422/485
Signal Line Amount: 4
Input Detection Capability:
                  :Ua-Ub> 0.07V
Output Signal Level:
                  Ua-Ub=5V(zero loaded)
Transmission Rate: 0∼19.2Kbit/s
Synchronous V.35
Clock Interface Type: DCE

LAN Interface

Specification: IEEE802.3
Bandwidth: 100Mbit/s
Applicable Ethernet rate:
       10M/100M auto adaptation
Work mode: Half-duplex/full duplex



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