Cisco SPA1001 Administration Guide - Page 163

User Guidelines C A P P E N D I X This appendix provides documentation for the use of the SPA products. It includes the following sections: • Basic Services, page C-1 • Enhanced Services, page C-2 The SPA can be configured to the custom requirements of the service provider, so that from the subscriber point of view, the service behaves exactly as the service provider wishes, with varying degrees of control left with the end user. This means that a service provider can leverage the programmability of the SPA to offer sometimes subtle yet continually valuable and differentiated services optimized for the network environment or target markets. This chapter describes how some of the supported basic, enhanced, and supplementary services can be implemented. The implementations described below are not the only way to achieve the desired service behavior. Basic Services Originating a Phone Call Service description User action required to activate or use Expected call and network behavior User action required to deactivate or end Placing telephone a call to another telephone or telephony system (IVR, conference bridge, and so on). This is the most basic service. When the user picks up the handset, the SPA provides dial tone and is ready to collect dialing information via DTMF digits from the telephone touchtone key pad. Although it is possible to support overlapped dialing within the context of SIP, the SPA collects a complete phone number and sends the full number in a SIP INVITE message to the proxy server for further call processing. To minimize dialing delay, the SPA maintains a dial plan and matches it against the cumulative number entered by the user. The SPA also detects invalid phone numbers not compatible with the dial plan and alerts the user via a configurable tone (Reorder) or announcement. Hang up the telephone. Document Version 3.01 Linksys ATA Administrator Guide C-1