Sentry GSM-DE3100 User Manual - page 7
7
INSTALLATION
SIM CARD INSTALLATION
STEP 1. Face the panel so the SIM card tray is on the bottom left corner.
Slide SIM card tray door left to unlock the tray.
STEP 2. Flip up SIM card tray door.
STEP 3. Insert SIM card into tray door with notched side of SIM card
facing up and metal contacts on SIM card facing left.
STEP 4. Gently push down to close tray door and pay careful
attention to notch of SIM card.
STEP 5. Slide tray door to the right in order to lock SIM card
into place. A “click” sound will indicate the tray door is locked.
STEP 6. Test system by powering on. A trouble beep will sound
if the SIM card is installed incorrectly.
GSM SIM Card Reminder:
As a reminder, please make sure you understand your Terms of Service with your GSM provider. The door entry system will not work without a valid
GSM SIM card. Works well with prepaid cards or subscription based cellular services using GSM only.
For example:
Some service providers in the USA such as T‐Mobile or AT&T have different service plans. Be aware that some plans may lose subscribed number if
prepaid card isn’t renewed after one year even if there still is a balance.