Cisco SPA1001 Administration Guide - Page 23

Chapter 1 Introducing Linksys Analog Telephone Adapters Technology Background Table 1-4 Linksys ATA Features Feature Signaling Hook Flash Event Configurable Dial Plan with Interdigit Timers Polarity Control Calling Party Control Report Generation and Event Logging Syslog and Debug Server Records Description The Linksys ATA can signal hook flash events to the remote party on a connected call. This feature can be used to provide advanced mid-call services with third-party-call-control. Depending on the features that the service provider offers using third-party-call-control, the following three Linksys ATA features may be disabled to correctly signal a hook-flash event to the softswitch: • Call Waiting Serv • Three Way Call Serv • Three Way Conf Serv You can configure the length of time allowed for detection of a hook flash using the Hook Flash Timer parameter on the Regional tab of the administration web server. The Linksys ATA has three configurable interdigit timers: • Initial timeout (T)-Handset off hook, no digit pressed yet. • Long timeout (L)-One or more digits pressed, more digits needed to reach a valid number (as per the dial plan). • Short timeout (S)-Current dialed number is valid, but more digits would also lead to a valid number. The Linksys ATA allows the polarity to be set when a call is connected and when a call is disconnected. This feature is required to support some pay phone system and answering machines. Calling Party Control (CPC) signals to the called party equipment that the calling party has hung up during a connected call by removing the voltage between the tip and ring momentarily. This feature is useful for auto-answer equipment, which then knows when to disengage. The Linksys ATA reports a variety of status and error reports to assist service providers to diagnose problems and evaluate the performance of their services. The information can be queried by an authorized agent, using HTTP with digested authentication, for instance. The information may be organized as an XML page or HTML page. The Linksys ATA supports detailed logging of all activities for further debugging. The debug information may be sent to a configured Syslog server. Via the configuration parameters, the Linksys ATA allows some settings to select which type of activity/events should be logged, as for instance, a debug level setting. Technology Background This section provides background information about the technology and protocols used by the ATA. It includes the following topics: • Session Initiation Protocol, page 1-10 • Network Address Translation, page 1-10 Document Version 3.1 Linksys ATA Administrator Guide 1-9