Linksys SPA2102-AN Administration Guide - Page 186

ATA Voice Field Reference Line page B PSTN Hook Flash Len The length of the hook flash in seconds. During a PSTN-toVoIP gateway call, the ATA device processes the out-ofband hook flash signal sent from the VoIP peer through a hook-flash (momentary on-hook signal) on the FXO port. This allows the VoIP peer to initiate a three-way conference call and subsequent call transfer. The duration of the on-hook signal can be configured using this parameter. The default is 0.25. The permitted range is limited to 0.02 to 1.6 seconds. PSTN Dial Digit Len Specify the on/off time when the Gateway transmits digits through the Line (FXO) port. The syntax is on-time/off-time, expressed in seconds with up to two decimal places. The permitted range is 0.05 to 3.00. The default is .1/.1. PSTN Hook Flash Default is .25. Len Voice tab > Line page > PSTN Disconnect Detection section (SPA8800) On the SPA8800, these settings are configured on the Phone pages only. Detect CPC CPC is a brief removal of tip-and-ring voltage. If enabled, the SPA will disconnect both call legs when this signal is detected during a gateway call. Detect Polarity Reversal The default is yes. If enabled, SPA will disconnect both call legs when this signal is detected during a gateway call. If it is a PSTN gateway call, the 1st polarity reversal is ignored and the 2nd one triggers the disconnection. For VoIP gateway call, the 1st polarity reversal triggers the disconnection. Detect PSTN Long Silence The default is yes. If enabled, SPA will disconnect both call legs when the PSTN side has no voice activity for a duration longer than the length specified in the PSTN Long Silence Duration parameter during a gateway call. The default is yes. Cisco Small Business ATA Administration Guide 186