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  • Napco StarLink2 SLe-GSM Universal Alarm Communicator — Specifications

    September 08, 2026 4 min read

    Specification sheet for the Napco StarLink2 SLe-GSM Universal GSM Alarm Communicator and the SLE-DLCBL Gemini up/download cable.

    Full text manual (for reference)

    Specification sheet for the Napco StarLink2 SLe-GSM Universal GSM Alarm Communicator, plus the SLE-DLCBL Napco up/download cable used with Gemini panels for full high-speed remote programming over the radio.

    SLe-GSM Overview

    The SLe-GSM is a universal backup or primary GSM/GPRS alarm communicator that reports full-event alarm data from virtually any control panel brand to any central station — no radio activation fee and no special equipment required.

    • Compatible with panels communicating in Contact ID and 4/2 formats.
    • Full high-speed Napco panel remote uploading/downloading (2-way, requires the high-speed SLE-DLCBL cable).
    • Signal-Boost Technology amplifies alarm signals and wave shapes for reliable reporting even in remote/fringe areas.
    • Optional email/text/SMS alerts (SLe-SMS service).
    • 1-step enrollment and programming built in for most jobs; advanced programming options also available.
    • Automatic dialer-capture technology eliminates time-consuming web setup.
    • Takeover Feature — captures a panel's existing central-station phone number and reroutes it to another central station.
    • Remote arm/disarm on any panel brand with a keyswitch input (SLe-REMOTE service option; free app).
    • Backup radio mode supervises telco and only sends GSM reports when telco isn't functioning.
    • Future-proof, field-upgradeable communication technology — the only communicator in its category that's plug-in upgradeable as networks progress (2G → 3G → 5G, etc.).
    • Includes SIM card and dual-band high-efficiency antenna.
    • Optional Smart Charger Module for use when panel aux power is limited and/or for optimized radio placement up to 100' from the panel.

    Radio Communications

    • Full event alarm reporting over the GPRS radio network for new and retrofit installations.
    • Universal — not limited to NAPCO panels; reports full-data alarms for any competitive control panel brand (Contact ID or 4/2) to any central station.
    • Full high-speed control-panel upload/download supported on Gemini™ P816/1632/1664 and P9600/3200/X255 series panels (requires SLE-DLCBL cable, sold separately).
    • Provides Primary and Backup Mode reporting, jumper-selectable:
      • Primary mode — radio provides Tip and Ring line feed voltage to the control panel and reports all panel alarms via GPRS.
      • Backup mode — radio detects when the premise's telco line is cut or the panel can't reach the central station, and reports via GPRS only in those instances.
    • Reports Contact ID and 4/2 format.

    Security / Ease of Installation

    • Encrypted alarm and upload/download packets.
    • 3 status LED indicators (visible with wiring cover installed): Green — signal strength; Amber — radio busy/activation; Red — trouble.
    • Tamper protection.
    • Dual-band antenna for North America, 2dBi+ gain.
    • Radio can be placed up to 100 feet from the control panel for best antenna location.
    • Built-in power supply uses alarm panel aux power as its source.
    • Optional Smart Charge Module available where aux (fire) standby power is too low, without needing a separate power supply (uses 4AH/12V battery).

    Specifications

    • Dimensions: SLE-GSM (self-contained): 7" L x 4.75" W x 1.5" D. Optional SLE-GSMET (hinged metal enclosure): 10.25" L x 8.25" W x 3" D.
    • Weight: 1.0 lb.
    • Trigger Inputs: Three hardwire inputs — IN1 differentiates steady, pulsing, temporal, and CO bell input (13.7–9.4VDC ±10%/-15%, 1mA max); IN2/IN3 programmable, jumper-configurable for EOLR/no-EOLR (13.7–9.4VDC, 1.2mA max).
    • PGM Outputs: Three open-collector outputs, 3V, 50mA. OP1 — troubles (supervisable: fail to communicate, antenna supervision, low input voltage, line-cut, GSM trouble). OP2 — programmable, defaults to Fail to Communicate. OP3 — programmable, defaults to Line-Cut (can convert to dry relay closure with SLE-PGMRLY).
    • Standby Power: 24 hours + 30 min UL/DL time with 4AH/12V battery.
    • Optional Backup Battery: 4AH, 12V.
    • Current Drain: 150mA.
    • Operating Temperature: 0 to 49°C.

    Ordering Information

    • SLE-GSM — GSM Communicator, SIM card included. Service plan(s) sold separately. No activation fee.
    • SLE-DLCBL — For use with Gemini panels only; Napco up/download cable, sold separately.
    • SLE-1632INTROPAK — "RAD-PAK" (Panel with Radio): SLE-GSM StarLink 2 Radio, Gemini P1632 32-Zone Panel, GEM-RP1CAe2 Custom Alpha Keypad, SLE-DLCBL cable, and panel transformer.
    • SLE-REMOTE — Remote app for arming/disarming any panel via wireless radio (requires service upgrade).
    • SLE-DLEXT — Optional up/download distance extender, from 10' up to 100 ft.
    • SLE-SMTCHG — Optional Smart Charge Module for optimal radio position where AC outlets or aux standby power are limited (uses a standard 4AH/12V rechargeable battery).
    • SLE-GSMET — GSM Communicator in metal housing (accommodates 4AH/12V rechargeable battery), SIM card included.
    • A606 — Free trifold end-user brochure (statement stuffer or self-mailer) for new and existing accounts.

    NAPCO Network Operations Center (NOC)

    • Signal-Boost™ Technology super-amplifies alarm signals and wave shapes at both the radio and NOC for reliability even in remote/fringe areas.
    • Reports to the central station of your choice — no special equipment needed; supports IP and other formats.
    • Automatically enrolls the radio into the system on first alarm transmission — no website setup required, no radio activation fee.
    • Website access allows complete management/modification of alarm routing and reporting.
    • Provides GSM radio supervision, central-station alarm reporting, text/SMS/email alerts, and remote arm/disarm service options.
    • Real-time status monitoring of all radio accounts (online, offline, check-in, signal strength, trouble conditions, low battery/voltage input).

    Manufacturer Contact

    NAPCO Security Technologies, Inc.
    333 Bayview Ave., Amityville, NY 11701 USA
    1-800-645-9445  |  1-631-842-9400  |  Fax 1-631-789-9292
    NASDAQ: NSSC  |  www.napcosecurity.com