PRS is a new non-voice value added services that allows information to be
sent and received across a GSM mobile telephone network. It supplements
today’s Circuit Switched Data (CSD) and Short Message Services (SMS).
G
circuit switched GSM network. This gives the option to use a packet-based data
service. The information is split into separated but related “packets” before being
transmitted and reassembled at the receiving end. Theoretically, maximum speeds
of up to 171.2 kilobits per second (kbps) are achievable with GPRS using all eight
timeslots at the same time. This is about 3 times as fast as the data transmission
speed possible over today’s fixed telecommunications networks and 10 times as fast
as current Circuit Switched Data services on GSM networks.
GPRS involves overlaying a packet based air interface on the existing
Figure1. Example of GPRS data transmission
Example: Cell with 1 Frequency channel:
1 physical channel for signalling, 4 physical channels for Circuit switched
and 3 physical channels for Packet switched
• New sound concept with polyphonic ringing tones / social
noises
• Kjava (identical to K45-Manta)
• LiIon Battery Pack 700 mAh
• Power Input: 1.8 A (0.6 ms) / 0.2 A (4 ms)
• Cut-off Threshold 3.2 V
• approx. 250 h measured at BSPAMFRMS = 9; number of
neighbouring cells = 0
• Best case approx. 5 hours (lowest output level with DTX)
• Worst case approx. 2.5 hours (highest output level without
DTX)
• Conditions for DTX: 40% user talk time
• Small (=”Plug In“) 1.8 V or 3 V-SIM card (Phase II).
• To insert the SIM the battery pack must be removed.
• The SIM reader coding will be realized by lower case.
• Full Rate, Enhanced Full Rate, Adaptive Multi Rate and
Half Rate speech coders are available as standard.
• Type: Full Graphic
• Resolution: 101 X 64 Pixel
• Illumination: Amber
• 12-digit block (0-9, #, *), small letters
• two function keys (SEND, END)
• ON/OFF key combined with the END key; the symbol ¢ (I
inside O) is used as a symbol for ON/OFF.
• 4 way navigation key as centered rocker type (up&down / 2
softkeys on left & right position)
• amber as illumination colour
• orientation at the housing in the area between keys “5“ and
“8”
• comfortable earpiece with optimal acoustics
• unidirectional microphone (similar to SL45 with modified
rubber gasket)
• loud signal emitter (soundringer) (>100dB(A) SPL @5cm,
'Hongkong-Spec.')
• different call melodies (for the amount see SW product
description). Realized with DSP firmware sound solution. All
melodies with increasing volume because of the danger of
acoustic shock. Additional measures to protect from
acoustic shock, see SW product description.
Due to changes on the connector from “Lumberg” to “Slim
Lumberg”, accessories using the old “Lumberg” connector will
not be able to be used on the new “Slim Lumberg” platform.
C55 Original Accessories
EMEA Portfolio
Basics
Basics
Li-Ion
Carry Set
Carry Set
FCS-500
FCS-500
CLIPit
CLIPit
Covers
Covers
Carrying
Carrying
Cases
Cases
ICM MP CCQ SF www.my-siemens.com/customercarePage 1
The L55 Tuna is designed as a single-pcb phone with exchangeable covers and
exchangeable keypad. The upper- and lower-cover are designed as two-coloured
parts, which is realized in 2-shot-moulding technology.
7.1 Assembly Concept for the Customer
Chassis
exchangeable
Rear-Cover
exchangeable
Front-Cover
battery
SIM-Card
exchangeable
keypad
The C55 is the first Siemens Mobile phone that enables the customer to freely
customize the outlook of their phone via the means of exchangeable Front/Rear
covers as well as keypad.
The C55/2128 assembly concept differs from the previous models (P35 & K45
series) slightly. The C55/2128 is no longer employing the concept of “No
Screws”. Instead of the previous upper & lower mounting frame to hold the PCB
and the housing together, the C55/2128 uses six screws to hold the light guide,
PCB and the mounting frame together.
As seen from the mechanical diagram, the C55/2128 also uses two other
different techniques from the previous models (P35 & K45 series). (1) The use of
a light guide on the front panel to disperse the light evenly throughout the keypad
& display area. (2) The use of a metal dome foil as keypad contact as opposed to
the carbon/metallic contact keypads used in the P35 & K45 series.
O
proceed to remove the 6 screws on the fro
with a “T6” screw driver; as indicated by the re
circles.
nt
Step 11
Once the screws has been removed, the PCB s it can be seen from the photo, the keypad
can also be seperated from the back casingof
the phone. The antenna is built-in on the back
case.
Step 13
Fully disassembled C55
Step 10
Once the screws has been removed, you
would be able to see the internal single PCB.
For the reassembly of the C55/2128, simply reverse the disassembly
procedures from Step 13 to Step 1. However there are some things to note
on the reassembly of the phone.
During the installation of the SIM card, ensure that the SIM card is properly
locked in. If not, it would result in card error, as the SIM card will not be properly
held in place.
Ensure that the SIM card is fully inserted and that the metallic lock is pulled
down.
During the installation of the battery, ensure that the hinges are properly in place.
Otherwise the battery will not be able to fit into the phone properly.
Ensure that the hinges are properly fitted before fixing in the battery.
The common mobile software available is divided into language groups. However, this
software does not contain the specific settings, such as ringing tones, greeting text, short
dial list etc., required by the operator(s) or service provider(s). Therefore, it is not
uncommon to have some menu item(s) differ in different variants or are not visible at all.
These settings are stored in different memory area of the mobile and will be activated
depending on the customer specific model or variant of the phone by a separate test
step during the production process.
Due to this separation of common mobile software and customer specific initialization, it
is possible to fulfill the demands of the market requiring customization and flexibility. As
a consequence the software programming process in the LSO is divided into two
different steps as followed:
- Software update to actual version and appropriate language group
The software of the mobile, L55 series, is loaded from a PC directly. Hardware
interconnection between the mobile and the PC is shown in Figure 2.24 Because of the
new type of external connector used in X55 series (Slim-Lumberg type) an additional
adaptor cable between mobile and boot adaptor is required. Table 2.1 listed all the
hardware requirements
If you use the battery dummy, make sure that the power supply voltage is correctly
adjusted.
Description Part No.
Bootadapter 2000 incl. AC-Adapter,
serial cable and mobile connection
cable
IBM Compatible PC – Pentium -
TABLE 2.1 EQUIPMENT LIST FOR SOFTWARE PROGRAMMING.
Every LSO repairing Siemens handset must ensure that the quality standards are
observed. Siemens has developed an automatic testing system that will perform
all necessary measurements. This testing system is known as:
12.2 Siemens Mobile Service Equipment
Using this system vastly simplifies the repair of the phones and will make sure
that:
1. All possible faults are detected
2. Sets, which pass the test, will be good enough to return to customer.
Starting from the P35 Series, Siemens will introduce a simpler and faster testing
platform for testing a repaired Siemens mobile phone. The testing platforms are
either base on R&S CMD 53/55 or CTS55 GSM test set.
There is also test software under development for testing with the Wavetek
4201S and the 4107 GSM test set.
A Level 2.5 service software is also under development for more elaborate
testing for the repair for the P35 series mobile phone.
THE LSO WILL HAVE TO PURCHASE THE SYSTEM, CHOOSING
BETWEEN THE COMPLETE PACKAGE OR SUB-SET OF IT.
A FULLY AUTOMATIC TEST PROCEDURE IS ONLY
POSSIBLE IF THE COMPLETE SYSTEM IS
INSTALLED.
Make sure that your CTS firmware is Version 3.01 or higher. For
CMD 55 it must be Version 4.03 and higher. Please check with the
Service Info SB_0500 for the CTS/CMD Hardware Options.
One Pentium MMX Window 95/98 PC with a serial port to connect to the GSM
test set through the PC serial cable provided for the GSM test set.
One Test SIM card and a fully charged battery for used with the mobile phone
model.
Additional RF connector will be needed for setup using Wavetek 4107 test set
and Wavetek Antenna Coupler.
For LSO Test Station setup base on the Wavetek 4107 test set, you need a TNC
(male) to SMA(female) connector. For the Wavetek Antenna Coupler, you need a
TNC (female) to SMA(female) connector. The part number for the connectors will
be announced soon.
For Wavetek GSM test set For Wavetek Antenna Coupler
Before executing the test software, it is important to ensure that the software
configuration matches that of the hardware set up. Each GSM Tester will have
specific test software. The test software is named CMD_GO, CTS_GO and for
Wavetek test set, CAT4200 respectively.
First, copy the installation software for the specific GSM tester to a temporary
directory on the harddisk of the Window PC and then Run the Setup from the first
sub directory – Disk1 for CMD_GO test software.
After the installation for the test software, RUN the Test software and check the
configuration setting for the Serial port.
For each model of the L55 series mobile phone, Siemens will distribute the
testing configuration file for the specific test station. For testing the phone, just go
to the File menu and select Load Configuration.
Make sure that your CTS firmware is Version 3.01 or higher. For CMD 55 it must be
Version 4.03 and higher. Please check with the Service Info SB_0500 for the
CTS/CMD Hardware Options.
12.4.2 Running the test sequence
Insert a Test SIM card and a fully charged battery into the Siemens mobile phone
and place it onto the phone holder on the Antenna Coupler. Switch the RF switch
to INT ANT position and select the Start button to run the test sequence in the
configuration file.
Follow the instruction on the screen and switch on the phone. The mobile phone
will start Network Search and doing Location Update to the GSM test set through
the off-air signal from Antenna Coupler.
Next, the GSM test set will initial a call to the mobile phone through the Antenna
Coupler. Press the Call key when the mobile phone ring, and the GSM test set
will start Tx Power measurements on the GSM and GSM1800 channel specified
by the configuration setting.
Next, the GSM test set will end the call to the mobile phone and the screen will
prompt for Dialing from the mobile phone. At this test step, please move the
mobile phone to the Antenna Cradle and switch the RF switch to EXT ANT
position. Once the mobile phone logs onto the GSM test set, dial 1234 and the
Send key.
The GSM test set will make Tx Power measurements, Rx BER measurement,
Echo Loop test on the GSM and GSM1800 channel specified by the
configuration setting. There will be an Echo Loop Back test for checking the
speech quality. Speak into the mobile phone when prompted and listen the voice
after approx 1 second and check the speech quality. If not O.K, it may be
microphone or the earphone defective.
The last test is Disconnect Call from the mobile phone. Press the End Call key
and the test sequence will end.
A measurement report screen will show up and a hardcopy can be printed if a
printer is connected to the PC. To close the measurement report screen, click
the third button from the left.
Once the mobile phone pass all the test steps, please make a check for all keys and the
display. After this we can confirm on the proper functioning of the mobile phone after
repair and return the phone back to the customer.