2N NetStar Hardware manual - Manual (Page 5)

5
GSM signal quality:
If a GSM card is a part of your system (or will become later on), it is necessary to
consider that the cable leading from the GSM card to the GSM antenna is usually 3m
long (max. 10m). You should ensure that within this diameter from the selected
system installation site a place with good GSM signal suitable for placement of the GSM
antenna is available. *)
Theft protection:
While selecting the installation site the insurance company conditions should be
regarded as well.
In the areas with very poor GSM signal level or high number of GSM
gates the use of internal (takes the position of a line card) or external
GSM splitter is advantageous.