AudioCodes MediaPack 114 Uživatelský manuál stáhnout pdf (Strana 361)

Version 5.6 361 November 2008

SIP User's Manual 7. IP Telephony Capabilities

Notes:

• When call forward is initiated, the device sends a SIP 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 a proxy is used,

the proxy’s IP address).

• For receiving call forward, the device handles SIP 3xx responses for

redirecting calls with a new contact.

7.14.5 Call Waiting

The Call Waiting feature enables FXS devices 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. The called party can accept the new call using hook-flash, and can toggle

between the two calls.

To enable Call Waiting:

 Set EnableCallWaiting = 1 (or using the Web interface, refer to ''Supplementary

Services'' on page 138)

 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 ''SIP Configuration Parameters'' on page 260).

 To configure the Call Waiting indication tone cadence, modify the following

parameters: NumberOfWaitingIndications, WaitingBeepDuration and

TimeBetweenWaitingIndications (or using the Web interface, refer to ''Supplementary

Services'' on page 138).

 To configure a delay interval before a Call Waiting Indication is played to the currently

busy port use the parameter TimeBeforeWaitingIndication (or using the Web interface,

refer to ''Supplementary Services'' on page 138). This

enables the caller to hang up

before disturbing the called party with Call Waiting Indications. Applicable only to FXS

modules.

Both the calling and called sides are supported by FXS modules; the FXO modules support

only the calling side.

To indicate Call Waiting, the device sends a 182 Call Queued response. The device

identifies a Waiting Call when a 182 Call Queued response is received.

7.14.6 Message Waiting Indication

Support for Message Waiting Indication (MWI) according to IETF <draft-ietf-sipping-mwi-

04.txt>, including SUBSCRIBE (to MWI server). The FXS device 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 Configuring the Call Progress Tones File in the Product

Reference Manual). 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 device can subscribe to the MWI server per port

(usually used on FXS) or per device (used on FXO).

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