| TSP Lab
| Mass Short Message Service System
| SGA-MSMS
|
System Overview - Hardware components
The topology of a non-duplicated system is depicted in the figure below.
The SGA-MSMS system contains at least one hardware component:
- an SGA-MSMS server which is connected to the
- Operator's Mobile Switching Center ("MSC") on bidirectional PCM/SS7 links
- Operator's Short Message Service Center ("SMSC") on IP network
- Operator's Network Operating Center ("NOC") on IP network
Checking Sga47 card
On the back of the Sga47 card a LED signs the state of connected PCM. (The lower LED is the relevant one, the other is indifferent, without reference its state)
Right after the PC power up, the led is uninitialized, it is in
random state and its color has no meaning. After the GyEIR application
has initialized the card, the meanings of LED are the followings:
- no light - there is no PCM signal on the cable at all
- red - PCM signal is OK on direction 0, but no PCM on direction 1 (on the user interface of the program the A side PCM is grey, the B side is red)
- green - PCM signal is OK on direction 1, but no PCM on direction 0 (on the user interface of the program the A side PCM is red, the B side is grey)
- amber - PCM signal is OK on both directions (on the user interface of the program both of the PCMs are grey)