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Line | Gateway (IP DECT)

Settings

• Gateway IP Address: Default = Blank
  Enter the IP address of the IP DECT base station that will be the Avaya IP DECT Mobility Manager (ADMM). If Enable DHCP Support is enabled, this address should be from the range of assignable IP Office DHCP addresses.   

• Compression Mode: Default = Automatic Selection
  This defines the type of compression which is to be used for calls on this line.

• Automatic Selection - During call setup, the IP Office negotiates the compression mode using the following order of preference: G729a, G.723.1, G711 ALAW, G711 ULAW. This order is an optimum balance of quality and bandwidth for most scenarios.

  • Other available options are: G.711 ALAW 64K, G.711 ULAW 64K, G.729(a) 8K CS-ACELP, G.729 Simple, G.723.1 6K3 MP-MLQ.

Enable DHCP Support: Default = Off
The IP DECT base stations require DHCP and TFTP support. Enable this option if the IP Office is being used to provide that support, using IP addresses from its DHCP range (LAN1 or LAN2) and its TFTP server setting. If not enabled, alternate DHCP and TFTP options must be provided during the IP DECT installation.

If it is desired to use the IP Office for DHCP support of the ADMM and IP DECT base stations only, the IP Office address range should be set to match that number of addresses. Those addresses are then taken during the IP Office restart and will not be available for other DHCP responses following the restart.

For Small Office Edition and IP406V2 control units, use of the embedded voicemail memory card slot for the TFTP server is recommended for small IP DECT installations. See System | TFTP IP Server Address. For other control units, or larger IP DECT installations, the use of a non-embedded TFTP software option other than Manager is recommended.

When Enable DHCP Support is selected, the following fields are also enabled:

• • Boot File: Default = ADMM_RFP_1_0_0.tftp, Range = Up to 31 characters.
    The name and path of the ADMM software file. The path is relative to the TFTP server root directory.

  • ADMM MAC Address: Default = 00:00:00:00:00:00
    This field must be used to indicate the MAC address of the IP DECT base station that should load the ADMM software file and then act as the IP DECT system's ADMM. The address is entered in hexadecimal format using comma, dash, colon or period separators.  

  • VLAN ID: Default = Blank, Range = 0 to 4095.
    If VLAN is being used by the IP DECT network, this field sets the VLAN address assigned to the base stations by the IP Office if Enable DHCP Support is selected.

  • • The IP Office itself does not apply or use VLAN marking. It is assumed that the addition of VLAN marking and routing of VLAN traffic is performed by other switches within the customer network.

    • An ID of zero is not recommended for normal VLAN operation.

    • When blank, no VLAN option is sent to the IP DECT base station.

  • Base Station Address List: Default = Empty
    This box is used to list the MAC addresses of the IP DECT base stations, other than the base station being used as the ADMM and entered in the ADMM MAC Address field. Right-click on the list to select Add or Delete. or use the Insert and Delete keys.  The addresses are entered in hexadecimal format using comma, dash, colon or period separators.  

• Silence Suppression: Default = Off
  When selected H.323 terminals will not send data if they are silent, this is useful when optimizing data traffic.

• Enable RSVP: Default = Disabled (Grayed out)
  This setting is allocated by the system and is not adjustable. RSVP is not support on the IP DECT system.

• Out of Band DTMF: Default = On (Grayed out)
  This setting is allocated by the system and is not adjustable. When on, DTMF is sent as a separate signal rather than as part of the encoded voice stream ("In Band").  This is recommended for low bit-rate compression modes such as G.729 and G.723 where DTMF in the voice stream can become distorted.

• Allow Direct Media Path: Default = On
  When disabled the media (voice) path always passes through the IP Office Control Unit. When enabled the remote end may be told of a new IP address for the media path if for example the call is transferred to a H.323 extension. Enabling this option may cause some vendors problems with changing the media path in mid call.