Sipura Technology SPA-2000 Basic Services, Enhanced Services, Originating a Phone Call, Caller ID

4.1.Basic Services

4.1.1. Originating a Phone Call

Service Description	Placing telephone a call to another telephone
	or telephony system (IVR, conference bridge,
	etc.). This is the most basic service.
User Action Required to Activate or Use	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.
Expected Call and Network Behavior	While 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. In order
	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).
User Action Required to Deactivate or End	Hang-up the telephone.
4.1.2. Receiving a Phone Call
Service Description	The SPA can receive calls from the PSTN or
	other IP Telephony subscribers
User Action Required to Activate or Use	When the telephone rings, pick up the handset
	and begin talking.
Expected Call and Network Behavior	Each subscriber is assigned an E.164 ID
	(phone number) so that they may be reached
	from wired or wireless callers on the PSTN or
	IP network. The SPA supplies ring voltage to
	the attached telephone set to alert the user of
	incoming calls.
User Action Required to Deactivate or End	Hang-up the telephone.

4.2.Enhanced Services

4.2.1.Caller ID

Service Description		If available, the SPA supports the generation
		and pass-through of Caller ID information.
User Action Required to Activate or Use		No user action required. The user’s telephone
		equipment must support Caller ID to display
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