Home Automation 70A00-1 Operation Manual - Everyday Use…

Everyday use… 

When the C3 is connected to the GSM cellular network, attached 

telephones can be used to make calls.  If a landline is present, you 

will hear the normal dial tone and you can make your call as normal 

using the landline service.  However, if the landline is currently 

unavailable, you will hear a different tone which indicates the C3 is 

in cellular mode and the call will be made using the cellular network.  

If the landline is available, but you still want to make the call using 

the cellular network, when you pick up the phone and hear the 

normal dial tone, press the ‘*’ key on the phone and the C3 will 

switch to GSM mode.  At that point, you will hear the cellular mode 

tone and you can make the call using the GSM cellular network. 

When a call is made to the phone number assigned to the GSM 

SIM card that is installed in the C3, any phones that are connected 

to the C3 will ring as they normally would when a landline call is 

received.

Used as Primary phone service (no landline) 

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