Yealink SIP-T42G - Manual (Page 75)

Customizing Your Phone
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2. Enter the emergency number in the Emergency field.
For multiple emergency numbers, enter a comma between every two numbers. The
default emergency numbers are 110, 911 and 120.
3. Click Confirm to accept the change.
Note
You can enable live dialpad on the SIP-T42G IP phone, which enables the IP phone to
automatically dial out the phone number without pressing any other key. You can also
configure a delay, where the phone will dial out the phone number automatically after
the specified period of time.
To enable live dialpad via web user interface:
1. Click on Settings->Preference.
2. Select Enabled from the pull-down list of Live Dialpad.
Emergency number is configurable via web user interface only.