Ericsson ZAT 19.2 Operation Manual page 314

46. Appendices _
16.7 Line parameters/connectors for different countries
The software which controls the modem is stored in a chip called
EPROM (Erasable Programmable Read Only Memory). Each
EPROM has a !abel of the type:
This is an example
RYSR 092 0004/x is the complete firmware article number
Rzz.zz is the complete revision state
yy-mm-dd is the firmware release date.
The set-up for a country is done with hardware strapping. An
overview of the hardware strapping fields is given in chapter 5.
Chapter 5 also describes how to treat the modem if you want to
change one of the functions associated with the strapping fields.
When delivered, the modem is set up for the correct country and
with the most commonly used functions. Normally there is no need to
change the strapping.
This chapter describes the modem set-up for selected countries, and
how to use the modular jacks.
The figure below shows the factory strapping common to all
countries.
16-14 LZTR104006 R1.00
Zat 14.4/14.4-7 and 19.2/19.2-7