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telephone number to forward calls to. The PHONE ADAPTER provides audio instructions to prompt
the user for a forwarding number and confirms that the requested service has been activated.
Call FWD – Unconditional
All calls are immediately forwarded to the designated forwarding number. The PHONE ADAPTER
will not ring or provide call waiting when Call FWD – Unconditional is activated.
Call FWD – Busy
Calls are forwarded to the designated forwarding number if the subscriber’s line is busy because of
the following; Primary line already in a call, primary and secondary line in a call or conference.
Call FWD - No Answer
Calls are forwarded to the designated forwarding number after a configurable time period elapses
while the PHONE ADAPTER is ringing and does not answer.
1.1.4.2.12. Anonymous Call Blocking
By setting the corresponding configuration parameter on the PHONE ADAPTER, the subscriber has
the option to block incoming calls that do not reveal the caller’s Caller ID.
1.1.4.2.13. Distinctive / Priority Ringing
The PHONE ADAPTER supports a number of ringing and call waiting tone patterns to be played
when incoming calls arrive. The choice of alerting pattern to use is carried in the incoming SIP INVITE
message inserted by the SIP Proxy Server (or other intermediate application server in the Service
Provider’s domain).
1.1.4.2.14. Speed Dialing
The PHONE ADAPTER supports speed dialing of up to eight (8) phone numbers or IP addresses. To
enter a telephone number speed dial using a touch tone telephone, the user dials a feature code
(*74), followed by a number (2-9), then the destination speed dialed target number. When the user
wishes to speed dial a target number, they press the corresponding speed dial assigned number
followed by the “#” (pound) key.
Users may also enter/review speed dials from User1/User2 web-pages. This interface or similar is
required to enter IP address targets.
1.1.4.3. PSTN Interworking
The PHONE ADAPTER is designed to provide a transparent interworking relationship with the PSTN.
Service providers can deploy the PHONE ADAPTER in such a way that PSTN endpoints – wired or
wireless – communicating with PHONE ADAPTER endpoints do so without modification to their
configuration or network settings.
The service provider may choose to deploy a multi-protocol VoIP network, much the same way the
PSTN supports multiple signaling schemes today. Most telecommunication providers operate
equipment that supports CAS or channel associated signaling, ISDN signaling and SS7 signaling.
When VoIP is introduced or used in the telecommunications landscape, it is likely that the service
provider will implement a signaling gateway that supports multiple IP Telephony protocols along with
legacy PSTN protocols. The signaling gateway is commonly referred to as a Softswitch.
Architecture and functionality can vary greatly amongst the different softswitch vendors. The
protocols used will depend on the types of connections that will be set-up across the service
provider’s network. If the provider is simply providing transport of calls to/from their network to
another provider’s network, but not originating or terminating calls with the endpoints, SIP will likely
be used for softswitch to softswitch communication.
© 2004 Linksys Proprietary (See Copyright Notice on Page 2)
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