SIU 02 » History » Version 1
laforge, 07/04/2020 01:12 PM
1 | 1 | laforge | h1. SIU 02 |
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3 | The SIU (Site Integration Unit) is an optional element in the transport network of the Ericsson 2G RAN. |
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5 | It includes functionalities like |
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6 | * 16 E1/T1 lines |
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7 | * 8 Gigabit Etghernet ports (up to 8x copper, up to 4x optical/SFP) |
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8 | * Ability to route IP/Ethernet traffic over E1 |
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9 | * Ability to convert from Abis/E1 or PacketAbis/E1 to Ericsson PacketAbis/IP (L2TP) |
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10 | * Synchronization for E1 |
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11 | ** from SyncE |
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12 | ** from IEEE PTP |
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13 | ** from 1PPS input |
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16 | h2. Connectors |
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17 | |||
18 | h3. POWER |
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20 | The DC input voltage of nominal 24..48V can be applied in any polarity. |
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22 | h3. CLOCK |
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24 | This is a 10P10C western connector, sometimes also called RJ50. |
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26 | Internally, it connects to some protection circuitry and then to a series of three ST2485EC RS-422 transceivers. |
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28 | The pinout is as follows |
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30 | |_.Pin|_.Signal|_.Function| |
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31 | |1|RS422-C Non-Inverting input|| |
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32 | |2|RS422-C Inverting input|| |
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33 | |3|RS422-B Non-Inverting input|?!?| |
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34 | |4|RS422-B Non-Inverting input|1PPS IN?| |
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35 | |5|RS422-B Inverting input|1PPS IN?| |
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36 | |6|?|| |
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37 | |7|RS422-A Non-Inverting output|1PPS OUT| |
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38 | |8|RS422-A Inverting output|1PPS OUT| |
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39 | |9|GND|| |
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40 | |10|+12V DC output|Supply external GPS?| |