AudioCodes MSBG Series User Manual

Version 7.2 547 Mediant 1000B Gateway & E-SBC
User's Manual 26. Configuring Supplementary Services
26.8 Message Waiting Indication
The device supports Message Waiting Indication (MWI) according to IETF RFC 3842. The
device also supports subscribing to an MWI server (using SIP SUBSCRIBE messages).
For FXS interfaces, the device can accept a SIP MWI NOTIFY message that indicates
waiting messages or cleared messages. Users are informed of these messages by a
stutter dial tone. You can define the stutter and confirmation tones in the CPT file. 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).
Note: For more information on configuring IP-based voice mail, refer to the IP Voice
Mail CPE Configuration Guide.
To configure MWI, use the following parameters:

EnableMWI

MWIServerIP, or MWISubscribeIPGroupID and ProxySet

MWIAnalogLamp

MWIDisplay

StutterToneDuration

EnableMWISubscription

MWIExpirationTime

SubscribeRetryTime

SubscriptionMode

CallerIDType (determines the standard for detection of MWI signals)

ETSIVMWITypeOneStandard

BellcoreVMWITypeOneStandard

VoiceMailInterface

EnableVMURI
The device supports the following digital PSTN-based MWI features:

ISDN BRI: The device supports MWI for its BRI phones, using the Euro ISDN BRI
variant. When this feature is activated and a voice mail message is recorded to the
mail box of a BRI extension, the softswitch sends a notification to the device. In turn,
the device notifies the BRI extension and a red light flashes on the BRI extension’s
phone. Once the voice message is retrieved, the MWI light on the BRI phone turns off.
This is configured by setting the VoiceMailInterface parameter to 8 (“ETSI”) and
enabled by the EnableMWI parameter.

Euro-ISDN MWI: The device supports Euro-ISDN MWI for IP-to-Tel calls. The device
interworks SIP MWI NOTIFY messages to Euro-ISDN Facility information element (IE)
MWI messages. This is configured by setting the VoiceMailInterface parameter to 8.

ISDN PRI NI-2: The device support the interworking of the SIP MWI NOTIFY
messages to ISDN PRI NI-2 Message Waiting Notification (MWN), sent in the ISDN
Facility IE message. This is applicable when the device is connected to a PBX through
an ISDN PRI trunk configured to NI-2. This is configured by setting the
VoiceMailInterface parameter to [9].

AudioCodes MSBG Series Specifications

General

Brand	AudioCodes
Model	MSBG Series
Category	Gateway
Language	English