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September 08, 2026 4 min read
Installation and setup guide for the ELK-C1M1LTEA ElkCommBd Communicator, a dual-path (IP + Cellular AT&T) alarm reporting device for ELK-M1G Control systems, including LED/display diagnostics, wiring, and Telguard/ElkLink registration steps.
The ELK-C1M1 LTEA ElkCommBd Communicator is a dual-path alarm communications device for the ELK-M1G Control family, built for AT&T networks. It sends full data messages using Internet (IP) as the primary pathway and Cellular as backup, with encrypted communications to the Central Monitoring Station throughout.
The C1M1 replaces old fashioned phone-line communications with a modern dual-path solution. It can be configured for single-path operation if either IP or Cellular is unavailable, and in dual-path mode can be programmed to detect an outage on one pathway and report it over the other. Periodic automatic test reports are sent over both pathways for reliability.
Cellular service is provided through a partnership with Telguard Online (a division of Telular Corporation). Central Station reporting parameters are managed via the ElkLink website. Installing dealers need accounts on both the Telguard Online and ElkLink websites.
| Operating Voltage | 12VDC |
| Standby Current | 85 mA |
| Max. Operating Current | 230 mA |
| Frequencies Supported | 800/1900 MHz |
| FIPS 197 Compliant | Certificate No. 3352 |
| Dimensions | 3.5" x 5.4" x 1.3" |
| Operating Environment | Indoor use only; 32-120°F (0-49°C), 0-85% humidity (non-condensing) |
| Supplied Antenna | Dipole screw-on |
| Power & I/O Connections | 4-position plug-in terminals |
| LAN Connection | RJ45 10/100 receptacle |
| RS232 Input Port | 3-wire serial to DB9M cable |
| USB Serial Port | Type "B" USB Mini |
| Code | Meaning |
|---|---|
| b [0-5] | Bars of cell signal (e.g. "b 3" = 3 bars) |
| E01 | Application not loaded |
| E02 | Radio Module Power Fail |
| E03 | No SIM card installed |
| E04 | Inactive unit |
| E05 | Low (poor) signal strength |
| E06 | No service or unregistered on cell network |
| E07 | Unable to communicate with M1 |
| E08 | Cellular radio module not detected |
| E09 | No Internet service (LAN detected) |
| E10 | No LAN detected (check cable) |
| E11 | Central Station not configured in ElkLink |
| E12 | CS Receiver failed to respond |
| E13 | No DHCP server found |
| A [address] | LAN IP address, one character at a time (e.g. "A 192.168.0.100"), shown for first 2 minutes after power up |
Caution: Do NOT apply power to the C1M1 until it has been activated on Telguard, registered in ElkLink, and connected serially to a working M1 Control panel — premature power application may cause the unit to be temporarily blocked by the cell carrier network. Also do not mount near where people regularly come within 20 cm (8 in) of the antenna, and always keep the antenna vertical (never horizontal).
C1M1 initiates all network connections outbound, so no inbound port forwarding is required. Customers with strict outbound firewalls need to allow these outbound ports:
| Port | Protocol | Purpose |
|---|---|---|
| 3061 (or CS-specified) | Outbound UDP | Communication with the Central Station IP Receiver |
| 8888 | Outbound TCP | ElkLink backend server & ElkLink Mobile app connectivity |
| 8899 | Outbound TCP | ElkRP Remote Programming and third-party apps (eKeypad, M1TouchPro) |
FCC ID: N7NHL7648 (LTE Radio Module). Complies with FCC Part 15 Class B. FIPS 197 compliant (Certificate #3352), using AES 128/192/256 encryption. Warranted free from defects for 2 years from date of manufacture; see Elk's website for full warranty terms.
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