Figure 100: Ucm6200 Pstn Detection; Figure 101: Ucm6200 Pstn Detection: Auto Detect - Grandstream Networks UCM6202 User Manual

Figure 100: UCM6200 PSTN Detection

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If there are two FXO ports connected to PSTN lines, use the following settings for auto-detection.
Detect Model: Auto Detect.
Source Channel: The source channel to be detected.
Destination Channel: The channel to help detecting. For example, the second FXO port.
Destination Number: The number to be dialed for detecting. This number must be the actual PSTN
number for the FXO port used as the destination channel.

Figure 101: UCM6200 PSTN Detection: Auto Detect

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UMC6200 Series User Manual