Cisco Systems Linksys PAP2, RT31P2 7.2.20. Message Waiting Indicator Tones MWI 7.2.21. Polarity Control , 7.2.22. Calling Party Control CPC , 7.2.23. International Caller ID Delivery

The PHONE ADAPTER 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 will offer using third-party-call-control, the following three

PHONE ADAPTER features may be disabled to correctly signal a hook-flash event to the softswitch:

1. Call Waiting Service

2. Three Way Call Service

3. Three Way Conf Service

7.2.18. Configurable Flash / Switch Hook Timer 7.2.19. Configurable Dial Plan with Interdigit Timers

The PHONE ADAPTER 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.

7.2.20. Message Waiting Indicator Tones – MWI 7.2.21. Polarity Control

The PHONE ADAPTER 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.

7.2.22. Calling Party Control – CPC

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.

7.2.23. International Caller ID Delivery

In addition to support of the Bellcore (FSK) and Swedish/Danish (DTMF) methods of Caller ID (CID)

delivery, release 2.0 adds a large subset of ETSI compliant methods to support international CID

equipment. The figure below shows the CID/CIDCW architecture used in the PHONE ADAPTER.

Different flavors of CID delivery method can be obtained by mixing-and-matching some of the steps

as shown.

It should be noted that the choice of CID method will affect the following features:

• On Hook Caller ID Associated with Ringing – This type of Caller ID is used for incoming calls when

the attached phone is on hook (see Figure 1 (a) – (c). All PHONE ADAPTER CID methods can be

applied for this type of caller-id

• On Hook Caller ID Not Associated with Ringing – In the PHONE ADAPTER this feature is used for

send VMWI signal to the phone to turn the message waiting light on and off (see Figure 1 (d) and (e)).

This is available only for FSK-based caller-id methods: “Bellcore”, “ETSI FSK”, and “ETSI FSK With

PR”

• Off Hook Caller ID – This is used to delivery caller-id on incoming calls when the attached phone is

off hook (see Figure 1 (f)). This can be call waiting caller ID (CIDCW) or to notify the user that the far

end party identity has changed or updated (such as due to a call transfer). This is only available if the

caller-id method is one of “Bellcore”, “ETSI FSK”, or “ETSI FSK With PR”.