Telephone Lights; Making And Receiving Calls - Motorola MT7711 User Manual

Telephone Lights

Here is a table describing the behavior of the Tel1 and Tel2 Lights:
TEL1 & TEL2
Note the lights are solid for each line when voice service is provisioned and
ready.
The lights blink slowly during active calls, and are OFF if no service is
provisioned.
Note that the Tel2 port will only function if you have two phone line service
from Comcast Xfinity.

Making and Receiving Calls

You can make and receive calls through connected telephone equipment
just as you would with any other landline telephone service. Remember to
dial 1 before long-distance calls within the United States. Check with Xfinity
whether your plan supports international dialing, and for dialing
instructions.
There are many services that come with Xfinity voice, including CallerID, Call
Waiting, and others, depending on your plan. Please see the Xfinity voice
page for details.
https://www.xfinity.com/support/articles/phone-quick-reference-guide
Blinking:
ON:
Green
Slow
Blinking:
OFF:
21
Registration in process
Phone on-hook / Ready
for calls
Phone off-hook / Call
active
Phone service not
provisioned