Cortelco 2747 - Manual (Page 35)

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4.3.1 SIP Parameters
Please see section 3.2 for an explanation of each field.
4.3.2 Forward Mode
Please see section 3.4 for an explanation of each field.
4.3.3 Advanced
4.3.3.1 Reg From
Modifies the “From:” field in the SIP / SDP messages. This field
should be left empty in most cases.
4.3.3.2 Reg To
Modifies the “To:” field in the SIP / SDP messages. This field should
be left empty in most cases.
4.3.3.3 Reg Expire
Modifies the “Expires:” field in the SIP/SDP messages. This will
control the re-registration period.
4.3.3.4 Min Media Port
The minimum value of the range of the transmitted RTP packet’s port.
4.3.3.5 Max Media Port
The maximum value of the range of the transmitted RTP packet’s port.
4.3.3.6 Codec
The type of codec used to transmit RTP packets. In SIP calls, the type
of codec used is determined by the called party.