Alcatel-Lucent 9500 MXC User Manual page 881

The main and standby radios are transmitting simultaneously and are tuned to different frequencies to avoid
interference. Under normal operating conditions, the primary radio carries traffic for tributaries 1 through 8 and
the standby radio carries traffic for tributaries 9 through 16. A fault detected in the traffic of the first eight
tributaries results in an automatic switch of those tributaries to the standby radio, disabling tributaries 9 through
16. A fault detected in the traffic of tributaries 9 through 16 will raise alarms but no switching will result.
DUART
Dual Universal Asynchronous Receiver Transmitter
DVM
Digital Volt Meter
DXR
Digital Cross Connect Radio
E1
ITU digital signal level 1 (2.048 Mbps) = CEPT 1
E3
ITU digital signal level 3 (34.368 Mbps) = CEPT 3
E/I
Energy to Interference ratio
E/N
Energy to Noise ratio
ECC
Error Correction Code
EEPROM
Electrically Erasable Programmable Read Only Memory
EIA
Electronic Industries Association
EISA
Extended Industry Standard Architecture
A 32-bit bus standard that supports the features of microchannel architecture. A special card is required for
32-bit operations that maintain compatibility with the older ISA (Industry Standard Architecture).
Electromagnetic Spectrum
Though the electromagnetic spectrum was, by custom and practice, formerly divided into 26 alphabetically
designated bands, the ITU formally recognizes 12 bands, from 30 Hz to 3000 GHz.
EM
Element Manager
EMC
Electro-Magnetic Compatibility
3DB 23063 ADAA - Rev 004 July 2007
9500 MXC User Manual
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