When using Zelio Logic with GSM (Global System for Mobile Communications),how to extend length of antenna without effecting Signal Quality.
It is possible to extend the antenna cable for Zelio Logic GSM communication and maximum length can be about 10 to 15 meters.
In order to avoid signal lost,it is recommended to use just one cable( not Extension Card).In this case,it is necessary to use a cable
RG58 with impedence of 50 ohms(SMA((SubMiniature version A) connector side Modem).
In order to be sure of the Reception Quality, using the command AT+CSQ,user will get information about the GSM Receive Signal Quality.