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HUAWEI Confidential

Security Level:

Possible Clock Source Setting

on RTN 620 Transmission

Prepared by : Reynaldo R. Delos Reyes

CSD Department – Microwave Transmission

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Conventional clock set-up without touching clock source configuration

We began to configure the RTN by tracing up the clocking source coming from BITS when 3G

BTS didn’t locked or synchronized. Most of it are successfully locked after the configuration.

BSC

BITS

2G BTS E1 Traffic + Clocking

on a pair of E1 cable

3G BTS IP Traffic

Clocking

Near-End Far-End

BSC

BITS

2G BTS E1 Traffic + Clocking

on a pair of E1 cable

3G BTS IP Traffic

Clocking

Configure to trace-up the

clock source on PH1 or PD1

board tributary port-1

for all near-end side.

Configure to trace-up the

clock source on IF board

for all far-end side.

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Example of clock source configuration on Near-End side

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Example of clock source configuration on Far-End side

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We add configuration on cross-connection if 3G BTS clocking was connected to RTN E1 board

BSC

BITS

2G BTS E1 Traffic + Clocking

on a pair of E1 cable

3G BTS

IP Traffic

Clocking taken from PD1 port 9

Configure to trace-up the

clock source on PH1 or PD1

board tributary port-1

for all near-end side.

Configure to trace-up the

clock source on IF board

for all far-end side.

Note: The clock source used here was Port-2 instead of Port-1.

There should be no physically traffic connection attached to clock

source because the NodeB clock status become Outscope.

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Our 3G BTS can also get clocking from PXC board.

BSC

BITS

2G BTS E1 Traffic + Clocking

on a pair of E1 cable

3G BTS IP Traffic

Clocking

Configure to trace-up the

clock source on PH1 or PD1

board tributary port-1

for all near-end side.

Configure to trace-up the

clock source on IF board

for all far-end side.

Clock Input (RX)

Clock Output (TX)

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HUAWEI Confidential

Security Level:

Thank You

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