--- title: Phone System Select description: Phone System Select --- [Skip to content](https://support.geoarm.com/honeywell/l3000lynxplus/phonesystemselect#main-content) English Show submenu for translations ![geoarm-by-alarmclub-logo-2024-transparent.png\]](https://support.geoarm.com/hs-fs/hubfs/geoarm-by-alarmclub-logo-2024-transparent.png?height=50&name=geoarm-by-alarmclub-logo-2024-transparent.png) Open main navigation Close main navigation - English Show submenu for translations - Visit GeoArm.com Visit GeoArm.com Hello. How can we help? - There are no suggestions because the search field is empty. 1. [Support Center](https://support.geoarm.com/?hsLang=en) 2. [Honeywell](https://support.geoarm.com/honeywell?hsLang=en) 3. [L3000 Lynx](https://support.geoarm.com/honeywell?hsLang=en#l3000-lynx) # Phone System Select 1) Enter Installer Code on the panel while disarmed (Default 4112) + 800 2) You Will now see 20 INSTALLER CODE if that was the correct installer code. 3) Press \*47 to begin changing the Phone System Select 4) Press \*99 After the screen updates to the next field to exit the programming Note: GeoArm can change the installer code upon activation This option is used to enter the correct type of phone dialing (pulse or tone), and to select the correct WATS line option for the Central Station. This option is used to activate the Speaker Phone option. For the LynxSIA Plus, it is also used to disable call waiting. Note: If using pulse dialing, you must enter the numbers slowly in order to allow the pulse dialer time to operate.  ![l3000-resideo-honeywell-home-lynx-plus-wireless-control-panel-10](https://support.geoarm.com/hs-fs/hubfs/l3000-resideo-honeywell-home-lynx-plus-wireless-control-panel-10.png?width=600&height=600&name=l3000-resideo-honeywell-home-lynx-plus-wireless-control-panel-10.png)   - [GeoArm](https://support.geoarm.com/geoarm?hsLang=en#main-content) - [FAQ](https://support.geoarm.com/geoarm?hsLang=en#faq) - [Update Credit Card](https://support.geoarm.com/geoarm?hsLang=en#update-credit-card) - [Geo-CT](https://support.geoarm.com/geoarm?hsLang=en#geo-ct) - [Geo-CTR](https://support.geoarm.com/geoarm?hsLang=en#geo-ctr) - [GeoAlarm App](https://support.geoarm.com/geoarm?hsLang=en#geoalarm-app) - [GeoAlarm](https://support.geoarm.com/geoalarm?hsLang=en) - [2GIG](https://support.geoarm.com/2gig?hsLang=en#main-content) - [Edge](https://support.geoarm.com/2gig?hsLang=en#edge) - [Gc2e](https://support.geoarm.com/2gig?hsLang=en#gc2e) - 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