Gateway IP Address

Default = Blank.

Enter the IP address of the gateway device at the remote end. This address must not be shared by any other IP line (H.323, SIP, SES or IP DECT).

Standby IP Address

Default = Blank.

IP Address of the Standby Master IP Base Station or the second Mirror Base Station. When the primary Mirror Base Station or Master Base Station is offline the second Mirror or the Standby Master will take over and the system will use this IP address.

Codec Selection

Default = System Default

Set the supported codecs. Where possible, Avaya recommend that you use the same set of codecs for all IP Office systems, lines, and extensions.

The options are:

• System Default - Use the codec list set in the system settings.

• Custom - Configure a list of codec preferences for the line.

  • You can move codecs between the Unused and Selected sets and change the order of the codecs.

  • The codecs available are set by System | System | VoIP | VoIP. The possible codecs are:

    • OPUS - Supported on Linux-based IP Office systems only.

    • G.711 ALAW/G.711 ULAW

    • G.729

    • G.723.1 - Supported on IP500 V2 systems only.

    • G.722 64K - Supported by Linux-based IP Office systems and on IP500 V2 systems with IP500 VCM, IP500 VCM V2 or IP500 Combo cards.

TDM | IP Gain

Default = Default (0dB). Range = -31dB to +31dB.

Allows adjustment of the gain on audio from the system TDM interface to the IP connection. This field is not shown on Linux based platforms.

IP | TDM Gain

Default = Default (0dB). Range = -31dB to +31dB.

Allows adjustment of the gain on audio from the IP connection to the system TDM interface. This field is not shown on Linux based platforms.

VoIP Silence Suppression

Default = Off.

When selected, this option will detect periods of silence on any call over the line and will not send any data during those silent periods. This feature is not used on IP lines using G.711 between systems. On trunk's between networked systems, the same setting should be set at both ends.

Allow Direct Media Path

Default = On

This settings controls whether IP calls must be routed via the system or can be routed alternatively if possible within the network structure.

• If enabled, IP calls can take routes other than through the system, removing the need for system resources such as voice compression channels. Both ends of the calls must support Direct Media and have compatible VoIP settings such as matching codec, etc. If otherwise, the call will remain routed via the system. Enabling this option may cause some vendors problems with changing the media path mid call.

• If disabled, the call is routed via the system. In that case, RTP relay support may still allow calls between devices using the same audio codec to not require a voice compression channel.