Nokia EKSOS Line Measurement Unit (T35140.01)¶

The optional Line Measurement Unit (LMU) makes it possible to remotely test the condition of copper access lines in a Nokia_EKSOS access multiplexer. It operates in conjunction with the test access relays in the interface units. Also, additional alarm inputs and outputs are available through the LMU.

The LMU supports the following features:

• scheduled tests
• line tests for PSTN and ISDN
• high-accuracy measurement of line parameters such as capacitance, foreign voltage and leakage resistance
• external test access (for testing the lines using external test equipment)
• cable-pair identification-tone test for all line types
• dry loop test
• external alarm inputs (digital and analog) and outputs (digital).

Photos¶

Connectors¶

Name	Designator	Type	Description
AUX	J8	RJ45
ALRM	J9	RJ45
EXT	J10	RJ45

Main Circuits¶

Main Processor¶

• MC68MH360AI25VL QUICC32 CPU / Controller
  • User Manual: MC68360UM.pdf
  • Tutorial: MC68360TUT.pdf
  • QMC Supplement: MC68MH360UM.pdf
  • Errata: MC68360UMAD.pdf
• 6x SHARP LH28F160S3HNS-S5 16Mbit Flash
  • Data sheet: LH28F160S3HNS.pdf
• 4x Samsung K4F151612D-TC60 1Mx16bit CMOS DRAM
  • Data sheet: K4F151612D.pdf

Backplane interface¶

DSP / ADC / DAC¶

• TI TMS320LC548PGE-66 fixed-point DSP
  • Data sheet: TMS320LC548.pdf
• 2x ADI ADG408BR 8:1 Analog Multiplexer
  • Data sheet: ADG408.pdf
• 2x ADI AD822 rail-to-rail op-amp
  • Data sheet: AD822.pdf
• 2x Infineon PEB4065T V4.0 HV-SLIC
  • High Voltage Subscriber Line IC
• 1x AD7863AR-10 quad-input dual 175kSPS 14-bit SAR ADC
  • Data sheet: AD7863.pdf
• 1x AD8801 octal 8-bit TrimDAC
  • Data sheet: AD8801.pdf