Service manual

5. Idetity and Security
5.1 Transceiver Labelling
Introduction
Each Motorola GSM transceiver will be labeled with various number configurations.The
following information shows and explains the common labeling titles.
Title Explanations
MSN
The Mechaniacal Serial Number(MSN) is an individual number, uniquely identifying the
unit. The MSN will remain the same throughout the units life, even if the main board is
replaced. Because the MSN is unique to the unit, it is often used for logging and tracking
purposes by Motorola National Service Centres on EPPRS. The MSN is divided into the
sections shown below.
Figure 3: MSN Configuration
CEPT GSM
This is the International Mobile Station Equipment Identity (IMEI) number. The IMEI is
held in the logic circuity.
If the main board is replaced then the units IMEI will change, therefore the units
labellings should be updated with the new IMEI. An IMEI uniquely identifies a mobile
station equipment to the system, and is divided into the sections shown below.
Figure4: IMEI Configuration
MSN 10 digits
3digits 1digit 2digits 4digits
Model Origin Date Serial
Code Code Code Code
IMEI 15 digits
6 digits 2 digits 6 digits 1 digit
Type Final Serial Spare
Approval Assembly Number
Code Code
MC OC DC SNR
TAC FAC SNR SP