Code Blue IP1500 VOIP SPEAKERPHONE - Manual (Page 26)

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IP1500 and IP2500 Series
Administrator Guide
Configuring Media Settings
For the SIP protocol, you can specify a port range from which the speakerphone will select IP ports
to offer to the other system for use with RTP communication.
The speakerphone can use any one of a suite of codecs for voice communication. Which codec
is used is dependent on negotiation with the remote system, but you can use Codec Selection to
specify a list of preferred codecs that will be offered in negotiation.
• To add codecs to the Preferred list, highlight them in the Available list and click Add.
• To remove codecs from the Preferred list, highlight them and click Remove.
• To change the order preferred codecs are offered, highlight them and click either Move Up or
Move Down to reorganize them.
Note that some codecs corrupt DTMF tones, e.g. G.729. If RFC2833 out-of-band DTMF signaling is
not in use, be sure to configure your codecs appropriately or you may not be able to use in-call com-
mands. Be sure to test your configuration to make sure all features are available.