Overview
TL255 (Ethernet) and 3G2055 / TL2553G (3G) are alternate communicators for IMPASSA SCW9055/9057 self-contained systems. They integrate inside IMPASSA I, D, or G model configurations.
Reporting path
Ethernet and/or 3G cellular (IMPASSA I/D/G variants)
At a Glance
| Detail | Value |
|---|
| Product type | Alarm communicator / reporting module |
|---|
| Model family (TL255, 3G2055, TL2553G) | See label and install manual |
|---|
| Reporting path | Ethernet and/or 3G cellular (IMPASSA I/D/G variants) |
|---|
| Primary manual | TL255 Install Manual; 3G2055 v3.0 Installation Manual |
|---|
| Region / listing notes | 433 MHz IMPASSA — match communicator to SCW9055/57 letter suffix (I/D/G) |
|---|
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 Internet Alarm Communicator (ID 1390)
- TL255 Install Manual; 3G2055 v3.0 Installation Manual — 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 |
| Communicator Trouble (IMPASSA) | SIM lock, 3G/Ethernet/receiver/supervision | Scroll troubles on WT5500; verify SIM and APN |
| T-Link Network Fault | IP path cannot reach network | LAN cable, router, firewall, receiver IP |
IMPASSA TL255 / 3G2055
| WT5500 display | Typical cause |
|---|
| SIM lock | Wrong APN or inactive SIM |
|---|
| 3G registration fail | Carrier sunset or weak RSSI |
|---|
| Ethernet fault (I/D) | LAN cable or DHCP on TL255 IP variant |
|---|
Match communicator to IMPASSA model suffix: I=TL255 IP, D=TL2553G dual, G=3G2055 cellular.
IMPASSA TL255 / 3G2055 troubles (WT5500 scroll)
| WT5500 display | Meaning |
|---|---|
| Communicator Trouble | Scroll for SIM / network / receiver sub-cause |
| SIM Lock | APN or inactive SIM |
| 3G Registration | Carrier sunset or RSSI |
| Ethernet Fault (I/D) | LAN cable, DHCP on TL255 IP variant |
Match IMPASSA suffix: I=TL255 IP, D=TL2553G dual, G=3G2055 cellular.
LED / module diagnostics
Refer to TL255 Install Manual; 3G2055 v3.0 Installation Manual for communicator-specific LED patterns and DLS module status screens.
Source: Host panel install manual § communicator / alt-comms troubleshooting; TL255 Install Manual; 3G2055 v3.0 Installation Manual.
| 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 |
| Communicator Trouble (IMPASSA) | SIM lock, 3G/Ethernet/receiver/supervision | Scroll troubles on WT5500; verify SIM and APN |
| T-Link Network Fault | IP path cannot reach network | LAN cable, router, firewall, receiver IP |
| WT5500 display | Typical cause | |
| SIM lock | Wrong APN or inactive SIM | |
| 3G registration fail | Carrier sunset or weak RSSI | |
| Ethernet fault (I/D) | LAN cable or DHCP on TL255 IP variant | |
| WT5500 display | Meaning | |
| Communicator Trouble | Scroll for SIM / network / receiver sub-cause | |
| SIM Lock | APN or inactive SIM | |
| 3G Registration | Carrier sunset or RSSI | |
| Ethernet Fault (I/D) | LAN cable, DHCP on TL255 IP variant |