DO U KNOW INSIDE THE SHELTER TOWER?

There are many devices inside the shelter. If I specify in TOTAL E & P backbone equipment, I’ll find ALCATEL 9400 LX microwave radio, New Bridge 3600 Mainstreet (multiplexer), SAGEM multiplexer (some of them), power panel, and GSM radios.

Aproximately, inside the building, i can figure it below:

Then How do they work?
The technology that is recently utilized in TOTAL is PDH (Plesiochrounous Digital Hierarchy), with 34Mbps capacity, or you can say it, 16E1. Radio will interface in each link and work point to point.

Theoriticaly, PDH is the first standardized digital higher-order transmission hierarchy from ITU-T (CCITT, at that time). The higher-order multiplexers of PDH are allowed to operate according to their own independent clock frequencies. Then there are two versions of PDH, European and American versions. The multiplexed stage details are shown below.

TOTAL use ALCATEL 9400 LX in this system. And as long as ALCATEL devices is used for 10 years, there are no important trouble. But, because POSTEL regulation and regeneration, TOTAL has to replace its devices with new one. THen, (project still in progress), Total changes its technology from PDH to SDH.

How SDH works?
To be continued.

When TV channel is not going properly…

Thursday, June 28, 2007

Today, I went to gunung Utara… I met Pak Alam.
I just wanted to clarify about the specification of the microwave radio in that site.
Then I ve got some datas from him.
Unfortunately my flash disk was full.
I deleted my PSM ITB songs there… But it’s useless… I didn’t know, why my flashdisk couldn’t work properly…

Planly, I wanted to go there later, next Friday.
In the afternoon, I met Pak Sugeng and Herman, who fixed TV parabola antenna there. I’ was very excited coz they are very kind to me.
There was a problem in RCTI program. I helped them by turning some bolts by wrench. Yeah… No problem. I spent my time there until 6 pm.
I was carried by Pak tRIJoko (Anju’s uncle) to the office.. (Thanks Sir!)