22 Matrix ETERNITY Quick Start
Connecting SIP Extensions
The SIP Extensions function like DKP/SLT extensions of the ETERNITY. You can 
register any SIP-enabled device, like an IP-phone, a Soft phone, Analog Phone 
Adapter, as the SIP Extension of the ETERNITY. 
The Number of SIP Extensions supported by ETERNITY varies by model:
• ETERNITY ME: 999 SIP Extensions. 
• ETERNITY GE: 500 SIP Extensions.
• ETERNITY PE: 50 SIP Extensions.
For SIP extensions, you will require the IP8 License. Make sure you have a valid License Key when 
connecting SIP Extensions. For more information on Licensing, see the topic ‘License 
Management’ in the System Manual.
You may connect the Standard and Extended IP Phones of Matrix. 
The Matrix Extended IP Phone, SETU VP248, takes on all the functions of EON48, 
the proprietary digital key phone of Matrix, except the following features:
• Background Music
• CO Call Waiting
• Hot Desking
• Live Call Screening
The SIP Extensions may be registered over WAN or over LAN according to your 
preference and your IP network installation scenario. 
You can register the same SIP Extension from three different locations. 
If you register the Extended IP Phone outside the Region/Country selected for ETERNITY, the 
time and Time Zone dependant features, such as Alarms, Reminders, Time Zone Display, of the 
phone at each location will operate according to the Real Time Clock of ETERNITY. Also, Access 
Codes and Emergency Numbers will work according to the Region/Country selected for 
ETERNITY.