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Getting Started
Introducing Your Phone
The SoundStation Duo conference phone is a dual-mode conference phone
that can operate in one of the following standard telephony modes:
• PSTN mode—In this mode, the phone is connected to a standard (analog)
phone jack so calls can be made using the Public Switched Telephone
Network (PSTN).
• SIP mode—In this mode, the phone is connected to a Session Initiation
Protocol (SIP) server so calls can be made over Internet Protocol (IP)
networks. In SIP mode, phones can use advanced features such as
messaging, forwarding, and transferring.
Your phone can be set up to operate in either mode. The mode your phone
operates in determines what features your phone will have.
Before You Use Your Phone
Generally, your phone will be deployed with multiple other phones. In this
case, your system administrator will configure the phone parameters
beforehand, so that after your phone is set up, the phone will be registered (for
SIP mode) or connected (for PSTN mode) and ready to use.
Your phone may be set up so that if it is unable to operate in SIP mode, it will
automatically switch—or ‘fail over’—to PSTN mode. When it fails over to
PSTN mode, SIP features (such as forwarding, transferring, and messaging)
will be unavailable.
During failover, all SIP calls will end. However, you will be able to place PSTN
calls immediately, without having to restart the phone. When SIP connectivity
is re-established, ongoing PSTN calls will continue. Subsequent calls you place
will use SIP mode.