User`s manual

MediaPack SIP User’s Manual 8. Telephony Capabilities
Version 4.6 171 June 2005
5. Do Not Disturb - Immediately reject incoming calls.
Three forms of forwarding parties are available:
1. Served party – the party that is configured to forward the call – MediaPack/FXS.
2. Originating party – the party that initiated the first call – MediaPack/FXS or FXO.
3. Diverted party – the new destination of the forwarded call – MediaPack/FXS or FXO.
The served party (MediaPack/FXS) can be configured through the Web browser (refer to Section
5.5.8.4 on page 104) or via ini file to activate one of the call forward modes. These modes are
configurable per gateway's endpoint.
Note the following SIP issues:
• Initiating forward – When forward is initiated, the gateway sends a 302 response with a
contact that contains the phone number from the forward table and its corresponding IP
address from the routing table (or, when Proxy is used, the proxy’s IP address).
• Receiving forward – The gateway handles 3xx responses for redirecting calls with a new
contact.
8.1.5 Call Waiting
The Call Waiting feature enables FXS gateways to accept an additional (second) call on busy
endpoints. If an incoming IP call is designated to a busy port, the called party hears call waiting
tone (several configurable short beeps) and (for Bellcore and ETSI Caller IDs) can view the Caller
ID string of the incoming call. The calling party hears a Call Waiting Ringback Tone. Called party
can accept the new call, using hook-flash, and can toggle between the two calls.
To enable Call Waiting:
• Set ‘EnableCallWaiting = 1’.
• Set ‘EnableHold = 1’.
• Define the Call Waiting indication and Call Waiting Ringback tones in the Call Progress
Tones file. You can define up to four Call Waiting indication tones (refer to the parameter
‘FirstCallWaitingToneID’ in Table
5-27).
• To configure the Call Waiting indication tone cadence, modify the following parameters:
‘NumberOfWaitingIndications’, ‘WaitingBeepDuration’ and ‘TimeBetweenWaitingIndications’.
• To configure a delay interval before a Call Waiting Indication is played to the currently busy
port use the parameter ‘TimeBeforeWaitingIndication’. This enables the caller to hang up
before disturbing the called party with Call Waiting Indications. Applicable only to FXS
gateways.
Both the calling and the called sides are supported by FXS gateways; the FXO gateways support
only the calling side.
To indicate Call Waiting, the gateway sends a 182 - call queued response.
The gateway identifies a Waiting Call when a 182 (call queued response) is received.
8.1.6 Message Waiting Indication
Support for Message Waiting Indication (MWI) according to IETF <draft-ietf-sipping-mwi-04.txt>,
including SUBSCRIBE (to MWI server). MediaPack/FXS gateways can accept an MWI NOTIFY
message that indicates waiting messages or that the MWI is cleared. Users are informed of these
messages by a stutter dial tone. The stutter and confirmation tones are defined in the CPT file
(refer to Section
16.1 on page 241). If the MWI display is configured, the number of waiting
messages is also displayed. If the MWI lamp is configured, the phone’s lamp (on a phone that is
equipped with an MWI lamp) is lit. The gateway can subscribe to the MWI server per port (usually
used on FXS) or per gateway (used on FXO).