Overview
T-Link TL250/TL300 (and Canada TL250D DVACS*) modules add supervised IP alarm reporting to classic PowerSeries and MAXSYS panels. They connect as an alternate communicator on the panel bus and report Contact ID / SIA formats to T-Link or compatible IP receivers.
Reporting path
IP/Ethernet (T-Link) to central station
At a Glance
| Detail | Value |
|---|
| Product type | Alarm communicator / reporting module |
|---|
| Model family (TL250, TL250D, TL300) | See label and install manual |
|---|
| Reporting path | IP/Ethernet (T-Link) to central station |
|---|
| Primary manual | T-Link TL250/TL300 Installation Manual; TL250D Canada DVACS dealer documentation |
|---|
| Region / listing notes | TL250D listed for Canada DVACS* only; verify regional SKU before install |
|---|
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 T-Link DVACS* Internet Alarm Communicator (Canada Only) TL250D - PowerSeries/Maxsys (ID 141)
- T-Link TL250/TL300 Installation Manual; TL250D Canada DVACS dealer documentation — 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 |
| T-Link Network Fault | IP path cannot reach network | LAN cable, router, firewall, receiver IP |
| T-Link Receiver Trouble | IP path cannot reach receiver | Receiver address, DNS, DSC/T-Link service status |
TL250 / TL300 specific
- Diagnostics module #110 on MAXSYS — verify Combus address and AES options if enabled.
- **TL250D (Canada DVACS*)** — receiver must accept DVACS* IP format; do not deploy NA TL250 firmware.
- Stand-alone TL300 quick-install differs from PC4020-integrated wiring — use the manual matching your host panel.
TL250 / TL300 T-Link indicators
| Panel trouble | Module LED / status | First checks |
|---|---|---|
| T-Link Network Fault | No IP link LED | Cable, switch port, DHCP |
| T-Link Receiver Trouble | Link OK, receiver fault | Receiver IP, DNS, AES key |
| Alt. Comms FTC | Panel cannot report via IP | Account, format, receiver online |
| MAXSYS module #110 fault | Combus diagnostics E110 | TL250 address on Combus, power |
TL250D (Canada): receiver must accept DVACS* format — NA TL250 firmware will fault at receiver.
LED / module diagnostics
Refer to T-Link TL250/TL300 Installation Manual; TL250D Canada DVACS dealer documentation for communicator-specific LED patterns and DLS module status screens.
Source: Host panel install manual § communicator / alt-comms troubleshooting; T-Link TL250/TL300 Installation Manual; TL250D Canada DVACS dealer documentation.
| 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 |
| T-Link Network Fault | IP path cannot reach network | LAN cable, router, firewall, receiver IP |
| T-Link Receiver Trouble | IP path cannot reach receiver | Receiver address, DNS, DSC/T-Link service status |
| T-Link Network Fault | No IP link LED | Cable, switch port, DHCP |
| T-Link Receiver Trouble | Link OK, receiver fault | Receiver IP, DNS, AES key |
| Alt. Comms FTC | Panel cannot report via IP | Account, format, receiver online |
| MAXSYS module #110 fault | Combus diagnostics E110 | TL250 address on Combus, power |