Exercise 6 Group Switch and Connection of Devices

GROUP SWITCH REVIEW

Please answer the following questions:1 How many slots are there in the GEM? Which slots are used for SCB-RP and XDB boards?

How many slots are used for device boards and what is the slot number?

26,

2 List the main feature of GS890?

Non blocking, device proction with out waste 3 How much is the switching capacity of one XDB board?

16kMUP

4 Give the explanation for the connectors on the front of XDBboard.

5 In which row of the switch matrix in GS890 is subrate switching implemented?

1st row

6 What is the rule for configuration and extension of GS890?All row & colum be 7 Is it possible to configure the GS890 with switching capacity of 176KMUP? Why?

NOP

8 What is the function of DLEB?

9 Give the explanation for the connectors on the front of DLEBboard.

10 What is the rule when configuring DELB boards in GEM?

8K pair

11 What is the rule when configuring ET155-1 boards with “working-protection” mode in GEM?

Max 8 pair ECT155-1 can be used in one pair………………….

12 What is the common hardware platform for TRA and ECP in GEM?

13 How much is the capacity of one TRA R6/TRAB4 board and ECP5 board?

14 How many clock modules are there in the CL890?

15 List the boards in CL890.

16 How many clock references can be connected to one IRB board?

17 List the three configuration of CL890.

18 List some applications of PDSPL-2E.

Exercise 6

DEFINITION OF DLEB

The figure below shows 4 GEM:

Number 0-0, 0-1, 1-0 and 1-1.

This means that the target size of this switch is 512K, but the actual size is 64K.

The highlights marked with “I” are the extension of DLEBs from the start of the exchange and are the only ones. Later more DLEBS are needed and an extension according to the DLEBs marked “II” is made. There are no DLEBs in GEM 0–1 and 1-1.

First define the DLEBs in extension “I” and then define the extension marked “II”.Define XM and use numbers in MUX34 and MUX3 according to the rules that say that there might be 8 DLEBs in one GEM.

Remember the standard extension consists of 2 GEMs at a time Define all MUX3.

The extension of this switch consists of 4 GEMs equals 4 pairs of XDB. Imagine that position 1 is occupied with e.g. ET155 in both GEMs.

Find the parameters according to the physical positions only the definitions with GDCOI are made.

ANSWER:

How many DL2 links are defined in the 2 GEMs now?

ANSWER: