Hiring telecom Engineers For many positions in Sky group company

SKY group is hiring for a multinational company Transmission Engineer with the below requirements,
1. Have a bachelor of Telecom engineering
2. Have an experience between 1 till 3 years in Ericsson Transmission
3. Have a very good experience in Traffic Node
4. Have a good experience in transmission troubleshooting
5. Have a good experience in Ericsson Links Installation
6. Can work under pressure
7. Ability to work during weekend
8. Work will be inside Greater Cairo
If interested please send your CV to cv@sky-grp.com quoting the job title

 ==============================================================

SKY group is hiring for a multinational company CM Engineers.
Experience : Start from 3-6 years with E// equipment’s (Radio & TRM)
Area : Helwan
If interested please send your CV to cv@sky-grp.com quoting the job title

 ==============================================================

SKY Group is hiring Acceptance Engineers for Etisalat Account. -Experience in Telecom field from 3 - 5 years.
If interested please send your CV to cv@sky-grp.com quoting the job title

Read More

How to test reachability of Baseband 3G and 4G after running scripts

The following video illustrate how to test reachability of Baseband 3G and 4G after running scripts
that's mean how to check the transmission root between BTS and OSS to know the site is visible from OSS or not.

Commands :

#Moshell 169.254.2.2

#lt all

#User name : rbs

#Password : rbs

#prox
# pr router
#MCC (Prox no of OAM ) ping -C 5 10.240.140.200

If there is reply from OSS then this site is reachable and controlled from integration team.

Notice that : 10.240.140.200 is the OSS IP address that's changed from one operator to another one.

Read More

Hiring project manager for Huawei company Libya

Project Manager is needed for huawei project in Libya-Trabulsi company accommodation will be provided
Strong knowledge in Huawei Radio/Fiber installation is must
Very good package..
Please send your CV to Michael.rashad@apcontra.com

Read More

مطلوب مهندسين اتصالات وفنيين خبره اريكسون وهواوى داخل مصر وخارج مصر

Vodatech company need Inside Egypt and outside Egypt engineers and technicians with experience from one to two years in Huawei, Ericsson equipment.

If you are interested ,send your cv to  
HR@vodatechltd.com
info@vodatechltd.com 
 Mohamed.elsayed@Vodatechltd.com
For calling 0235951038 - 01120000578 - 01120000571 from 9AM to 5pm

تعلن شركة فوداتك داخل مصر وخارج مصر للتعيين فورا مهندسين و فنيين ذوي خبرة من سنة إلى سنتين في أجهزة هواوي، و اريكسون
إذا كنت مهتما، إرسال السيرة الذاتية إلى
HR@vodatechltd.com
info@vodatechltd.com
 Mohamed.elsayed@Vodatechltd.com
For calling 0235951038 - 01120000578 - 01120000571 from 9AM to 5pm

Read More

Why RX level value always negative ?

"Rx Level"

Why is it negative ??

Before i tell you why Rx level is negative, you must know about "dbm"

dbm => decibel-milliwatt
It is measured power referenced to one milliwatt (mW).
Its value is 10 * log[ P(W) / 1mW ]

Rx level is the strength of the signal that our mobile receives from a BTS (mobile tower). Here Rx level stands for Receiver Level

Mathematical formula to calculate the Rx level is
RxLev (dBm) = EIRP (dBm) - Path Loss (dB)

EIRP - Equivalent/Effective Isotropically Radiated Power is the amount of power that an antenna which evenly distributes power in all directions would emit to produce the peak power density observed in the direction of maximum antenna gain.
EIRP (dBm) = Pt (dBm) + Ga (dBi)

i - antenna gain in reference to isotropic antenna
t - output power transmitted

Path Loss - For a given antenna, the received power is inversely proportional to distance between the transmit and receive antennas & also to the square of frequency.

Ls ~ d^2 f^2
Path loss - Ls(dB) = 32.4(dB) + 20*log [ f (MHz) ] + 20*log [ d (km)]
where 32.4 is a constant of proportionality

The value of Path loss is always greater than EIRP, hence Rx level is negative

Example:

If we take power as 2 W i.e., maximum output from a UMTS/3G mobile phone of Power class 1
Pt will be 33 dbm (calculated using dbm formula).
Let gain Ga be 9 dBi => EIRP = 33 + 9 = 42 dBm

Frequency be 1800 MHz; Distance be 2 Km
Path loss = 32.4 + 65.1 + 6 = 103.5 (calculated using path loss formula)

Rx level = 42 - 103.5 = - 62 dBm ** negative value **

RX level Range
In few websites, i found Rx level mentioned in a range of 0 to 63 (positive value). Just subtract it from 110 dBm to get the value of Rx level. 0 to 63 equals -110 dBm to -47 dBm.
Upto - 65 dbm : Excellent
-65 to -75 : Good
-75 to -95 : Normal
> -95 : Weak

Rx Lev Sub and Rx Lev Full ??

Rx_Level_Full is measured when DTX is off.
RX Lev Full Its is nothing but the Mobile transmit the measurment report(SACCH multiframe) for every 480ms. This
multiframe containes 104 TDMA frames, in 104 TDMA frames 4 TDMA frames for Decode the BSIC and remaining 100 TDMA
frames for Average measurment of serving cell and neighbouring cell.This average measurment of 100 TDMA frames
are RX Lev Full

RX Lev Sub is when DTX is on.
DTX is a discontinouse trasmission, When the mobile conversation 40% of the time either Trasmitter or Receive is idle. When DTX is ON, DTX will switch off the Trasmitter or Receiver when they is no speech Pulses. only
few TDMA frames will trasmit, the average of this TDMA frames is called RX Lev Sub, give you proper measurment of RX level.

Read More

Difference between Diplexer & Duplexer

"Difference between Diplexer & Duplexer"

Diplexer => Diplexer separates two different frequency bands in receive path and combines them in transmit path. These frequency bands usually will be wide apart in frequency domain for diplexer to work satisfactorily.
It is often referred as RF power combiner/divider with added functionality of filtering. Broadband Filters are used to pass appropriate bands at Tx and Rx path.

Examples => Diplexer is used to separate/combine frequency bands of GSM 900 and DCS 1800 systems. It is also used in multiband design of mobile handset with multiple technologies GSM, CDMA, LTE.
As shown inthe figure, diplexer does multiplexing and demultiplexing of wide frequency bands with much appropriate difference. Figure shows L and H bands at S port.

Duplexer => A Duplexer is a device that allows use of the single antenna by both transmitter and receiver. In other words duplexer is a device which couples the transmitter and receiver to the antenna while producing isolation between transmitter and receiver.

There are two types of duplexer, one by using PIN diode switches and the other using circulators as shown. Both transmit and receive paths usually will have frequency bands very nearer, hence narrow band filters are used to separate these frequencies. Duplexer is often referred as 3-port RF circulator.

Example => It separates Uplink (890-915MHz,Uplink-UL) and Downlink (935-960MHz,Downlink-DL) frequency bands in GSM900 system.

Read More

مطلوب مهندسين تليكوم وفنيين خبره 0-2 لشركه اتصالات ابو ظبى

Read More

Full ericsson gsm training course

1-Ericsson GSM-based system model

http://www.mediafire.com/file/vjx3mpm002nx6m6/03813_01_B.ppt

2-RBS 200 and RBS 2000 TX and RX reference points

http://www.mediafire.com/file/yz0sh4a1nl63xqo/03813_02_B.ppt

3-Channel configuration  

http://www.mediafire.com/file/sl4s7ajvjzmas1z/03813_03_B.ppt

4-Antenna configuration 

http://www.mediafire.com/file/gsha8kg1pnbqu5x/03813_04_B.ppt

5-Repeater selectivity

http://www.mediafire.com/file/zzq940yphmut31c/03813_05_B.ppt

6-Calculating the straight line between transmitter and receiver

http://www.mediafire.com/file/f9ji6ltbh28vrx8/03813_06_B.ppt

7-compass used for site surveys

http://www.mediafire.com/file/av57la3sfa24bbi/03813_07_B.ppt

8-TEMS system overview

http://www.mediafire.com/file/rm83f86avfy8vh0/03813_08_B.ppt

9-The workflow of indoor cellplanning

http://www.mediafire.com/file/e4yxhzsawi979z9/03813_09_B.ppt

10-Cell Splitting 

http://www.mediafire.com/file/llz4fb8fb1z2b82/03813_10_B.ppt

11-The Use of NCC in Two Countries

 http://www.mediafire.com/file/4f7zyvymqqddy5q/03813_11_B.ppt

12-GPRS Logical Architecture

http://www.mediafire.com/file/r3m0r3ub2wt58hq/03813_12_B.ppt

  

        

Read More

All Basic and Upgraded Packages for Ericsson 3G cabinets

Basic Packages :

R1AA : http://www.mediafire.com/file/m4ewdqpgww0lepk/CXP9023290_6-R1AA.zip

R3CA09 : http://www.mediafire.com/file/6813mmp933071f1/W14B+Basic+CV+R3CA09.rar

Upgraded Packages :

R3CA15 : http://www.mediafire.com/file/jo5z1znehc117ca/CXP9023291%254_R3CA15.rar

R2CA27 : http://www.mediafire.com/file/yfe42bqtbfuypfl/CXP9023291_6-R2CA27_W16B.3.zip

R2EA20 : http://www.mediafire.com/file/zx9tfp07v9t9y7l/Upgrade_package_for_RBS_DUW_CXP9023291_6-R2EA20_W16B.5.zip

Read More

All Ericsson Programs ( 2G , 3G , 4G , TN , TCU , PBC6200 , SSC-02 )

OMT 67 : http://www.mediafire.com/file/8zclc6fduelez7y/OMT+67.rar

Winfoil : http://www.mediafire.com/file/35t57t112424uwb/winfiol.rar

Free SFTP : http://www.mediafire.com/file/sstjs304v4o14hn/Free+Sftp.rar

MiniLink : http://www.mediafire.com/file/e7wdgez7gn47170/Mini+link+craft+14B.rar

PMS : http://www.mediafire.com/file/f10v9c53cas5zd0/PMS+SW+ver+2.12.rar

EM Luncher : http://www.mediafire.com/file/b1i40n1rjrnf99w/EM+launcher.rar

Cygwin : http://www.mediafire.com/file/y9ae28v879tgic7/cygwinBin4Emcli.zip

 Moshell : http://www.mediafire.com/file/220m1wra74j38le/moshell17.0d.zip

Hyper terminal : http://www.mediafire.com/file/is8gm7in5incw5n/HyperTerminal.rar

RBS element Manager : http://www.mediafire.com/file/fzs6ik1h7kj4cvi/RBS+++JAVA.rar

WS FTP Pro : http://www.mediafire.com/file/qz5yzx00qx4jazc/WS_FTP+PRO-7.0.0.1.rar

USB to Serial : http://www.mediafire.com/file/7yenqhzyse52shc/usb+to+serial.rar

Bison : http://www.mediafire.com/file/twv94p62bx275xc/bison+prg.zip

Read More

All releases of OMT program for Ericsson 2G cabinets

For Ericsson 2G cabinets :
old cabinets : 2000

New cabinets :6000
The same program used to log in the cabinets .

Here is the releases of OMT programs and you must install the latest one 

OMT 49 : http://www.mediafire.com/file/pbeu5p501jjdpg9/OMT+49.rar

OMT 52 : http://www.mediafire.com/file/fbzcl9g9qjb0ij1/omt+52.rar

OMT 55 : http://www.mediafire.com/file/vh461x2aanav1x1/OMT+55D.rar

OMT 65 : http://www.mediafire.com/file/kqoo37tu824wzsf/OMT+65.rar

OMT 66 : http://www.mediafire.com/file/7q31l2x1d9bpxwu/OMT+66.rar

OMT 67 : http://www.mediafire.com/file/8zclc6fduelez7y/OMT+67.rar

Read More

مطلوب مهندسين اتصالات ومدنى لشركه اتصالات بالرياض

Read More

مطلوب مهندسين تليكوم ومهندسين سيفتى لشركه عمانيه

Read More

مطلوب مهندسين اتصالات خبره ترانسميشن خارج مصر

Urgently required for outside Egypt project
Advanced networks hiring outside Egypt project.
• Senior Engineers
• Field Engineers
TRM/RADIO Experience.
If interested please send your CV to
Tamer.zarief@advancednetworks-eg.com
Waleed.abbass@advancednetworks-eg.com
quoting the job title.

Read More

TN Alarms and how to clear alarms

1- LOS (Critical)

 

Loss of Signal (LOS)
LOS is detected on the incoming traffic, probably due to traffic failure in transmitting direction.
Specific Problem

Specific Problem    : LOS
Source                     : E1
Alarm Type             :Communication Alarm
Severity                   :Critical
Probable Cause        :Loss Of Signal

 Corrective Actions

Check cables and equipment in the traffic path.

 Alarm Clearance
The alarm is cleared when traffic is detected in the incoming signal. 

2- AIS (Minor)

Alarm Indication Signal (AIS)
This alarm due to cable disconnected from RBS (Radio Base station) side or E1 disconnected from Route (before reach to TN at site)
An AIS is detected on the incoming traffic.

Specific Problem    : AIS
Source                     : E1
Alarm Type             :Communication Alarm
Severity                   :Minor
Probable Cause        :Alarm Indication Signal

3- HCC (Major)

Hop Communication Channel (HCC)
Communication is lost on the HCC, between the MMU and the far-end MMU.
When there is problem to connect with far end

Specific Problem    : HCC
Source                     : All MMUs
Alarm Type             :Communication Alarm
Severity                   :Major
Probable Cause        :Unavailable

Consequences
It is not possible to access the Far End.

 Alarm Clearance
The alarm is cleared when access to the Far End is recovered. 

4- RCC (Major)

Radio Communication Channel (RCC)
Communication is lost on the RCC, between the MMU and the RAU.

The RAU is disconnected from the MMU and therefore out of service.

Specific Problem    : RCC
Source                     : All MMUs
Alarm Type             :Communication Alarm
Severity                   :Major
Probable Cause        :Unavailable

5- TIM (Major)

Trace Identifier Mismatch (TIM)
TIM at the Radio side. (Check Radio ID)

Specific Problem    : TIM Radio Side
Source                     : RADIO RS
Alarm Type             :Communication Alarm
Severity                   :Major
Probable Cause        :Path Trace Mismatch

Read More

Hiring Telecom Engineer for Sky group company

SKY group is hiring CM Engineer with the below requirements;

Experience : start from 2-5 years with Huawei equipment’s (Radio) , TRM for (E//& Huawei))
Area : GIZA

if you are interested please send your CV to cv@sky-grp.com quoting the job title.

Read More