SIU 02 » History » Version 1
laforge, 07/04/2020 01:12 PM
| 1 | 1 | laforge | h1. SIU 02 |
|---|---|---|---|
| 2 | |||
| 3 | The SIU (Site Integration Unit) is an optional element in the transport network of the Ericsson 2G RAN. |
||
| 4 | |||
| 5 | It includes functionalities like |
||
| 6 | * 16 E1/T1 lines |
||
| 7 | * 8 Gigabit Etghernet ports (up to 8x copper, up to 4x optical/SFP) |
||
| 8 | * Ability to route IP/Ethernet traffic over E1 |
||
| 9 | * Ability to convert from Abis/E1 or PacketAbis/E1 to Ericsson PacketAbis/IP (L2TP) |
||
| 10 | * Synchronization for E1 |
||
| 11 | ** from SyncE |
||
| 12 | ** from IEEE PTP |
||
| 13 | ** from 1PPS input |
||
| 14 | |||
| 15 | |||
| 16 | h2. Connectors |
||
| 17 | |||
| 18 | h3. POWER |
||
| 19 | |||
| 20 | The DC input voltage of nominal 24..48V can be applied in any polarity. |
||
| 21 | |||
| 22 | h3. CLOCK |
||
| 23 | |||
| 24 | This is a 10P10C western connector, sometimes also called RJ50. |
||
| 25 | |||
| 26 | Internally, it connects to some protection circuitry and then to a series of three ST2485EC RS-422 transceivers. |
||
| 27 | |||
| 28 | The pinout is as follows |
||
| 29 | |||
| 30 | |_.Pin|_.Signal|_.Function| |
||
| 31 | |1|RS422-C Non-Inverting input|| |
||
| 32 | |2|RS422-C Inverting input|| |
||
| 33 | |3|RS422-B Non-Inverting input|?!?| |
||
| 34 | |4|RS422-B Non-Inverting input|1PPS IN?| |
||
| 35 | |5|RS422-B Inverting input|1PPS IN?| |
||
| 36 | |6|?|| |
||
| 37 | |7|RS422-A Non-Inverting output|1PPS OUT| |
||
| 38 | |8|RS422-A Inverting output|1PPS OUT| |
||
| 39 | |9|GND|| |
||
| 40 | |10|+12V DC output|Supply external GPS?| |
