Strata CIX 200, Programming Manual

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Applications Guide
IP Telephone Quality of Service (QoS) Programming
Strata CIX Programming Vol.1 12/09
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Priority Control Adjustments
This VoIP feature provides a framework in which voice traffic flowing on the network is prioritized over
other types of traffic. CIX supports two industry standard types of Priority Control: IEEE802.1p and Diffserv
(Differentiated Services). These options should be enabled simultaneously so the voice packets remain
prioritized through the whole network path. IEEE802.1p prioritizes voice packets on the Ethernet (LAN)
level and DiffServ prioritizes voice packets that pass through the internet, intranet, etc.
Important! Priority Control processing has two requirements for it to work accurately. All network
Ethernet equipment connected to the BIPU LAN (routers, switches, etc.) must be in
compliance with IEEE802.1p voice packet prioritization. When going through a network
provider (ISP, etc.), the provider must support the DiffServ feature - contact your ISP for this
service.
To setup priority control from Network eManager
1. Select IP-Telephony > System IP Data.
2. For Ethernet level (LAN) voice packet priority control:
• Enable field 07 IEEE802.1p
• Set field 08 IEEE802.1p. Configuration and set Voice or Best Effort - voice provides a higher level of
priority.
3. For IP level (Internet) voice packet priority control enable field 03 DiffServ.
4. Set field 04 TOS Field Type (TOS -Type Of Service or DSCP - Differentiated Service code point)
Note The most common type used is TOS
• If set to “TOS”
Set field 05 “TOS Precedence type” (CRITIC/ESP ~ Routine) where CRITIC has the highest priority.
Set “TOS Delay type” (Normal or Low) – Low is the best service setting
Set “TOS Throughput” (Normal or High) – High is the best service setting
Set “TOS Reliability” (Normal or High) – High is the best service setting
• IF set to “DSCP”
Set field 06 DSCP from 1~64, Basic setting should be one of the following:
0 = Best effort, The default setting for most IP traffic.
24 = Assured flow (AF) or Controlled Load, intended to classify streaming traffic.
40 = Expedited Flow (EF) or Guaranteed, intended to classify high priority traffic. Used by VoIP
gateways to mark VoIP traffic.