3Com® VCX V7111 VoIP Gateway User Guide 4354 In the Invalid phone number field, enter a number that generates a fast busy tone whendialed. Usually, any incorrect phone number should cause a fast busy tone.5 Click Next.The CPTWizard communicates with the FXO gateway using TPNCP (TrunkPackNetwork Control Protocol). If this protocol has been disabled in the gatewayconfiguration, the CPTWizard does not display the next screen and an error isreported.Recording Screen – Automatic ModeAfter the connection to the V7111/FXO gateway is established, the recording screen isdisplayed.Figure 156 Recording Screen –Automatic ModeTo start recording in automatic mode:Click the Start Automatic Configuration button; the wizard starts the following Call ProgressTones detection sequence (the operation takes approximately 60 seconds to complete):1 Sets port 1 offhook, listens to the dial tone2 Sets port 1 and port 2 offhook, dials the number of port 2, listens to the busy tone
