User's Manual

Avaya Branch Gateway Manager 10.0 Page 148
15-601011 Issue 29r (Friday, November 02, 2012)B5800 Branch Gateway
· DSCP Mask (Hex): Default = FC (Hex)/63 (decimal). Range = 00 to FC (Hex)/0 to 63 (decimal)
Allows a mask to be applied to packets for the DSCP value.
· SIG DSCP (Hex): Default = 88 (Hex)/34 (decimal). Range = 00 to FC (Hex)/0 to 63 (decimal)
This setting is used to prioritize VoIP call signaling.
· DHCP Settings
· Primary Site Specific Option Number (SSON): Default = 176. Range = 128 to 254.
A site specific option number (SSON) is used as part of DHCP to request additional information. 176 is the default
SSON used by 4600 Series and 5600 Series IP phones.
· Secondary Site Specific Option Number (SSON): Default = 242. Range = 128 to 254.
Similar to the primary SSON. 242 is the default SSON used by 1600 and 9600 Series IP phones requesting
installation settings via DHCP.
· VLAN: Default = Not present.
This option is applied to H.323 phones using the system for DHCP support. If set to Disabled, the L2Q value
indicated to phones in the DHCP response is 2 (disabled). If set to Not Present, no L2Q value is included in the
DHCP response.
· 1100 Voice VLAN Site Specific Option Number (SSON): Default = 232.
This is the SSON used for responses to 1100/1200 Series phones using the system for DHCP.
· 1100 Voice VLAN IDs: Default = Blank.
For 1100/1200 phone being supported by DHCP, this field sets the VLAN ID that should be provided if necessary.
Multiple IDs (up to 10) can be added, each separated by a + sign.
· RTP keepalives:
These settings can be used with SIP trunks associated with the LAN through their Use Network Topology Info
setting (Line | Transport ). For some scenarios, with frequent call forwarding on the same SIP trunk, speech path
may be lost during the connection. The use of periodic keepalive packets may prevent the issue.
· Scope: Default = Disabled
Select whether the sending of keepalive packets should be disabled or sent for RTP or for both RTP and RTCP.
· Periodic timeout: Default = 0 (Off). Range = 0 to 180 seconds.
Sets how long the system will wait before sending a keepalive if no other packets of the select SCOPE are seen.
· Initial keepalives: Default = Disabled.
If enabled, keepalives can also been sent during the initial connection setup.
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