Avaya 38DHB0002UKDD manual The Voice over IP Tab, Automatic Selection, G.711 ALAW 64K

Page 40 - Line Functions The Configuration Tree Functions

The Voice over IP Tab

Gateway IP Address: Enter the IP address of the remote system.

Voice Pkt. Size: This is the number of data bytes contained in a Voice Packet.

Compression Mode: This defines the type of compression which is to be used on any Voice call on this Line. Amongst the options available, the recommended options are :-

Automatic Selection:

The most appropriate compression mode will be automatically selected for the hardware (default setting)

G.711 ALAW 64K:

Each voice call is converted from analogue to digital and uncompressed at 64kbps.

G.729(a) 8K CS-ACELP:

Astandard ITU-T coding algorithm used for speech compression. Reduces voice to 8kbps, resulting in the bandwidth utilasion of 29.6kbps across the Lan and 12.4kbps across the WAN.

G.723.1 6K3 MP-MLQ:

Astandard ITU-T coding algorithm used for speech compression. Reduces voice to 6.3kbps, resulting in the bandwidth utilasion of 20.8kbps across the Lan and 9.333kbps across the WAN.

Gatekeeper Primary IP Address: For future use.

Gatekeeper Secondary IP Address: For future use.

H450 Support: Selects the supplementary service signalling method for use across H232 connections. Options are None, Qsig or H450.Silence Suppression: When selected, voice traffic will be automatically reduced during pauses in conversation. This is useful when optimising data traffic across the WAN.

Enable FastStart: A fast connect procedure. Reduces the number of messages that need to be exchanged before audio channel is created.

Fax Transport Support: If selected this option will provide support for faxing over a H.323 connection.

Local Hold Music: When selected H.323 terminals will, were applicable, use their own hold music.

Local Tones: When selected H.323 terminals will use their own ringing tones.

Enable RSVP: For future use.

Out of Band DTMF: If selected DTMF will be suppressed and a message is sent instead to create the DTMF at the remote end.

Allow Direct Media Lines: Not used.

Voice Networking: This option enables extension number sharing with the remote system. Extensions on the remote system can then be dialled from the local system. This requires that extension numbers and names on the two systems are unique. Line and group extension numbers are not shared. Remote extension numbers cannot be included in local groups.

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Line Functions	38DHB0002UKDD – Issue 7 (22/11/02)