Figure 105. Control Lan Sub-System - Alcatel 1850 TSS-320 Technical Handbook

[4] SPI bus amd SPIDER block: three SPI stripes have been foreseen towards all the other units of the
equipment:
• one for the main shelf (with the exception of WDM boards),
• one for the WDM boards
• the last one for the access shelf (access shelf is not available in current release)
SPIDER block collect basic failure alarms of the unit, collect remote inventory information.
The block is power from service voltage coming from central unit (POW320)
SPI BUS EXTENSION block is used to extend the SPI bus towards other slave devices and also
drives the bicolor led present on the front cover of the unit.
[5] Internal LAN bus: 5.LAN: the two SLCs, the two ECs and all the ports are connected together by
means of a LAN. The two LAN switches (named "LAN Switch" and "GE Switch") depicted in Figure
106. are the "core" of this function. By means of such switches the Equipment Controllers can be
"connected" to two Q3 interfaces and to two Drop Shelf interfaces.
Figure 105. on page 164 depicts a global scheme of these connections.
EC A
1000
10/100/1000
Drop
GE
Shelf
Switch
Drop
Shelf
10/100
Debug
Interface
Alcatel 1850 TSS-320 Rel. 1.1
164/270 8DG 07734 AAAA Edition 01
10/100
Q3
10/100
1000 Q3
Spare
ETH
Switch
32
10/100
10/100
SLC
Shelf Controller "A"

Figure 105. Control LAN Sub-system

1000
1000
10/100
Q3
10/100
Q3
ETH
Spare
Switch
32 10/100
Ports
10/100
10/100
SLC
Shelf Controller "B"
EC B
1000
1000
10/100/1000
Drop
GE
Shelf
Switch
Drop
Shelf
10/100
10/100
Debug
Interface
Technical Handbook Common
Unit Descriptions