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laforge, 07/04/2020 01:17 PM
SIU 02¶
The SIU (Site Integration Unit) is an optional element in the transport network of the Ericsson 2G RAN.
It includes functionalities like- 16 E1/T1 lines
- 8 Gigabit Etghernet ports (up to 8x copper, up to 4x optical/SFP)
- Ability to route IP/Ethernet traffic over E1
- Ability to convert from Abis/E1 or PacketAbis/E1 to Ericsson PacketAbis/IP (L2TP)
- Synchronization for E1
- from SyncE
- from IEEE PTP
- from 1PPS input
Connectors¶
POWER¶
The DC input voltage of nominal 24..48V can be applied in any polarity.
CONSOLE¶
This is an RJ45 Ethernet port, internally connected to a BCM5221 Fast Ethernet PHY
CLOCK¶
This is a 10P10C western connector, sometimes also called RJ50.
Internally, it connects to some protection circuitry and then to a series of three ST2485EC RS-422 transceivers.
The pinout is as follows
Pin | Signal | Function |
---|---|---|
1 | RS422-C Non-Inverting input | |
2 | RS422-C Inverting input | |
3 | RS422-B Non-Inverting input | ?!? |
4 | RS422-B Non-Inverting input | 1PPS IN? |
5 | RS422-B Inverting input | 1PPS IN? |
6 | ? | |
7 | RS422-A Non-Inverting output | 1PPS OUT |
8 | RS422-A Inverting output | 1PPS OUT |
9 | GND | |
10 | +12V DC output | Supply external GPS? |
Updated by laforge almost 4 years ago · 2 revisions