Справочник Пользователя для RAD Data comm E1
FOM-E1/T1 Installation and Operation Manual
Chapter 1 Introduction
Technical Specifications
1-5
1.4 Technical Specifications
E1/T1
Interface
Interface
Transmission Rates
E1: 2.048 Mbps
T1: 1.544 Mbps
T1: 1.544 Mbps
Interface
User-selectable:
• E1: 120Ω balanced or 75Ω unbalanced
• T1: 100Ω balanced
• E1: 120Ω balanced or 75Ω unbalanced
• T1: 100Ω balanced
Zero Suppression
E1: HDB3
T1: B8ZS
T1: B8ZS
Connectors
Balanced: 15-pin D-type, female
Unbalanced: two BNC
Unbalanced: two BNC
Optical
Interface
Interface
Operating
Wavelength
Wavelength
See
Receiver Sensitivity
For BER 10
-9
:
• -38 dBm at 850 nm
• -40 dBm at 1310 nm or 1550 nm
• -40 dBm at 1310 nm or 1550 nm
Connectors
ST, SC or FC
Dynamic Range
28 dB for all types of optical interfaces
Budget (Max)
20 dB for 850 nm over 62.5/125
22 dB for 1310 nm over 9/125
28 dB for 1310 nm or 1550 nm laser over 9/125
22 dB for 1310 nm over 9/125
28 dB for 1310 nm or 1550 nm laser over 9/125
Alarm
Operation
Normally Open and Normally Closed, using different pins
Connector
15-pin, D-type, female
Indicators
POWER
ON – The unit is powered
TEST LOC
ON – The unit is in local loopback mode
TEST REM
ON – The unit is in remote loopback mode
ELECTRICAL LOW
ON – The electrical interface input is below G.703
electrical levels
ELECTRICAL AIS
ON – An “All 1s” string is received at the electrical
interface
OPTICAL ERR
ON – Bit error rate of the received signal from the optical
interface is 10
-6
or worse
OPTICAL AIS
ON – An “All 1s” string is received at the optical interface