Cisco SPA1001 Administration Guide - Page 146

PSTN Line Tab Chapter 5 Linksys ATA Field Reference Field PSTN Hook Flash Len PSTN Ring Thru CWT Delay PSTN Ring Timeout PSTN Dialing Delay PSTN Dial Digit Len Description The length of the hook flash in seconds. During a PSTN-to-VoIP gateway call, the Linksys ATA processes the out-of-band 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. Specify the delay before incoming PSTN calls will ring Line 1 using a Call Waiting Tone. The default is 3. Specify the delay after a ring burst before the Gateway decides that the PSTN ring has ended. The default is 5. Specify the delay after the PSTN phone line is on-hook before the Gateway dials a PSTN number. The default is 1. 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 Disconnect Detection Field Detect CPC Detect Polarity Reversal Detect (PSTN) Long Silence Min CPC Duration Detect Disconnect Tone Description 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. 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. 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 during a gateway call The default is yes. Specify the minimum duration of a low tip-and-ring voltage (below 1V) for the Gateway to recognize it as a CPC signal or PSTN line removal. The default is 0.2. If enabled, SPA will disconnect both call legs when it detects the disconnect tone from the PSTN side during a gateway call. Disconnect tone is specified in the parameter, which depends on the region of the PSTN service. The default is yes. 5-62 Linksys IP Phone Administrator Guide Document Version 3.2