OpenVox DGW-1004 User Manual page 12

Local Your local. This will be used for the tone style. Used when in-call indications need to be generated such as ring back, busy,
congestion, and other call-oriented inband tone signals.
Interface It shows you the current type of port. It has two type:E1 and T1
Type
Table 3-1-2 Definition of advanced interface type
Options Definition
Echo Cancellation Whether or not to enable echo cancellation
RX Gain Gain for the RX (receive -into Asterisk)channel.Default:0.0
TX Gain Gain for the TX (transmit -out of Asterisk Asterisk)channel.Default:0.0
Table 3-1-3 Definition of Port Details
Options Definition
Timing Timing Source indicate the ports as to which should be used to recover the clock.(0 for master mode, upper for client mode, small
Source number have higher priority )
Interface Choose a line type for this interface, all ports must be the same type.
Framing Framing method for this interface
Figure 3-1-2Port Details