Vodavi XTS-IP Installation Manual page 181

VoIP Maintenance and Troubleshooting
Type of Service -- From the main menu, type [y] (to select the Show Type of Service Value) and
press <Enter>. The following informational screen will display:
DESCRIPTION
------------------------------
Delay
Throughput
Reliable
root:\
Refer to Flash 46 programming in Appendix D of the Programming & Operations Manual to set
a Type of Service (TOS) option that controls bits in the IP datagram header for outgoing packets.
There are no set recommendations for using the TOS bits on Vodavi cards because network
providers may use TOS bits in a number of ways, or may ignore them completely. Note that
making changes to these bits does not by itself have an effect on the VoIP card's performance.
Rather, the TOS bits may be used by the network provider's routers to give priority to voice
traffic. Setting descriptions for TOS are shown below (note that Flash 46 programming provides
options that are combinations of these settings):
Minimize Delay -- This setting prioritizes the packet in the network device, queuing
other packets and delivering the priority packet first. The same happens for inbound
packets, producing a lower delay for the packets.
Maximize Throughput -- This setting provides the packet a greater use of bandwidth
through the device, making sure that any contentions for bandwidth are won by the
packet with this TOS.
Maximize Reliability -- This setting verifies that delivery of the packet is guaranteed.
Reliable communications usually results in reduced throughput and higher latency in
order to guarantee packets reach their destination. Old X.25 networks were very
reliable, but also quite slow.
Normal Service -- No special handling is provided for packets when this setting is
used. Most IP packets do not have any of these TOS bits set, meaning that they are
treated on a first in first out (FIFO) basis. Normal Service is the default setting in
Flash 46 programming.
Reset LAN Card -- From the main menu, type [r] and press <Enter>. The VoIP card returns the
message: "VoIP card will be reset? Y/N"
Select Y or press <Enter> to reset the card.
Select N to stop the VoIP card from resetting.
Exiting the Administration Menus -- From the main menu, type [x] and press <Enter> to exit
the Administration menus.
XTS-IP - Installation Manual
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Chapter 4 - Maintenance and Troubleshooting
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December 2005