Your Position: Homepage > Products > OLT


OM4E1PCM30 can be classified into a b c models by their respective functions. It contains its own optical interface, 4 E1, 30 channels of PCM services, 1 100Mbit/s Bas_T, and multiplexes all of them into one optical signal. Usually OM4E1PCM30 is used in point-to-point mode. OM4E1PCM30 is one equipment with reasonable price in optical network. Its front panel can be turned over and the extension cards is hot-plug. Alarm LED of each unit is visible directly for convenient monitoring.


OM4E1PCM30 contains 16 card slots totally. The right slot is MUX card slot and the other 15 slots are all extension card slots. Each signal processing slot holds 2 channels of signal. From left TS1 to right TS30, multiplexed into 1E1.

OM4E1PCM30 Signal Processing Slot List
Module Introduction
OM8E1PCM MUX unit. Single port optical interface. Power supply module and ring module integrated. 2 channels of 2 wire voice signals extensible.
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

OM4E1PCM30's framework is made of 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
Optical interface FC/SC
E1 port L9 coaxial connector
extension card port RJ45, 8 sockets totally, 4 signal channels per socket.
NM port RJ45


Port Electrical Parameter

Technical features of OM4E1PCM30 meets ITU-T G.703、G.711、G.712、G.713、G.714、G.732.

PCM30 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: ±5×10E-5
Impedance at E1 Interface: 75Ω/120Ω
E1 Signal Amplitude: 2.37V/3V
Capacity: 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%


Capacity: 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

Capacity: 5/6/10
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: < 15W
Performance Temperature: 0℃∼+40℃
Operation Temperature: -10℃∼+45℃
Storage Temperature: -40℃∼+60℃
Performance Humidity: 10%∼90%(+35℃)
Operation Humidity: 5%∼95%(+35℃)

Optical Interface

Code rate: 150Mbit/s
Fiber mode: Single mode 9/125μm
Wavelength: 1310nm/1550nm
Transmit power: -15dBm∼-3dBm
Receive sensitivity: -44dBm∼-38dBm
Port amount: 1∼2

LAN Interface

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

Data Interface Card

Capacity: 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



©Hengguang Technologies Copyright 2010