Overview
LTE System Enhancement Module for PowerSeries — Alarm.com interactive + LTE backup on Keybus.
Reporting path
Alarm.com IP + LTE (PowerSeries SEM)
At a Glance
| Detail | Value |
|---|
| Product type | Alarm communicator / reporting module |
|---|
| Model family (LTE SEM) | See label and install manual |
|---|
| Reporting path | Alarm.com IP + LTE (PowerSeries SEM) |
|---|
| Primary manual | System Enhancement Module Installation Guide (English) |
|---|
| Region / listing notes | LTE carrier certification per SEM SKU |
|---|
Before You Install or Replace One
- Confirm exact model number on the communicator label matches the install manual.
- Verify host panel family — Keybus PowerSeries, Neo Corbus, MAXSYS Combus, IMPASSA integrated, or universal dialer-capture are not interchangeable.
- Confirm monitoring receiver and account accept this communicator format (Contact ID, SIA, IP, cellular).
- Check carrier/network generation (3G sunset, LTE band, Ethernet path) for your region.
- Add communicator current draw to panel battery standby calculation where the module loads from panel bus power.
Official Sources
- Product page: DSC PowerSeries LTE SEM Module (ID 2622)
- System Enhancement Module Installation Guide (English) — DSC official documentation
Error Codes
Communicator faults appear on the host panel trouble display ([*, 2] on keypads where supported) and in DLS/dealer tools — the communicator itself may show LED status per its install manual.
Common communicator troubles
| Panel / display | Meaning | First checks |
|---|---|---|
| FTC / Failure to Communicate | Report did not reach central station | Account, path, format, receiver online |
| Alt. Comms AC / Battery | Communicator power fault | Module power wiring, panel AUX budget, battery size |
| Alt. Comms FTC | Alternate path failed | Test primary and backup paths separately |
| Cellular registration / SIM | Module cannot register on mobile network | SIM active, APN, RSSI, antenna placement, carrier sunset |
LTE SEM module
- LTE SEM registration fault after 3G SEM swap usually requires DLS communicator type update, not just SIM change.
LTE SEM
LTE registration fault after HSPA SEM swap requires communicator type and APN update in DLS — SIM alone will not register.
LED / module diagnostics
Refer to System Enhancement Module Installation Guide (English) for communicator-specific LED patterns and DLS module status screens.
Source: Host panel install manual § communicator / alt-comms troubleshooting; System Enhancement Module Installation Guide (English).
| Code | Meaning | Suggested Fix |
|---|---|---|
| FTC / Failure to Communicate | Report did not reach central station | Account, path, format, receiver online |
| Alt. Comms AC / Battery | Communicator power fault | Module power wiring, panel AUX budget, battery size |
| Alt. Comms FTC | Alternate path failed | Test primary and backup paths separately |
| Cellular registration / SIM | Module cannot register on mobile network | SIM active, APN, RSSI, antenna placement, carrier sunset |