The second generation Ooma Telo is compatible with all Ooma add-on devices, while the first generation Telo is only compatible with select add-on devices. This article contains instructions to help you determine which generation of Telo you have and to help you make sure your add-on peripherals can be installed properly.

  1. How can I tell which generation of the Ooma Telo I have?
  2. Which Ooma add-ons are compatible with each generation of Telo?
  3. How can I change which add-ons my second generation Telo can pair with?

How can I tell which generation of the Ooma Telo I have?

You can determine which generation of the Ooma Telo you have by checking the activation code on the bottom of the device:

activation code

If your activation code begins with a 2 or higher, you have the second generation Telo. If your activation code begins with a 0 or a 1, you have a first generation Telo. In this case, you may wish to contact our Customer Care Team to begin the process of upgrading your Telo to a newer model.

Which Ooma add-ons are compatible with each generation of Telo?

The chart below outlines which add-ons are compatible with each generation of the Telo.

First Gen. Telo Second Gen. Telo

Ooma Telo Handset
Yes Yes*

Ooma HD2 Handset
Yes Yes

Ooma HD3 Handset
Yes Yes

Ooma Linx
Yes Yes

Ooma DP1 desk phone
No Yes

Ooma Safety Phone
Yes Yes

Ooma Home Security Door and Window Sensor**
Yes Yes

Ooma Home Security Water Sensor**
Yes Yes

Ooma Home Security Motion Sensor**
Yes Yes

Ooma Home Security Garage Door Sensor**
Yes Yes

*Both generations of Telo can either pair with Ooma Telo Handsets or with all other compatible Ooma add-on devices.
**The first generation Telo can support up to three compatible Ooma Home Security sensors. The second generation Telo can support up to 30 Ooma Home Security sensors.

How can I change which add-ons my second generation Telo can pair with?

The type of add-on you synced with your Telo first will determine which group of devices your Telo is currently set up to use. You can update that preference by following the instructions in this article.