Avaya T3 Comfort, Руководство по обслуживанию

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Commissioning options for an IP telephone
47
IP audio settings
The IP audio settings can be adjusted to local conditions.
Generally speaking, this is carried out by the network specialist. He/she must determine
the network and transmission quality. This data is then used to decide,
•
which protocol to use (G.711, ...); if necessary, a greater traffic load requires
another Codec (G.729)
•
whether you want to receive small packets with little information but faster
•
whether you want to receive larger packets with more information but slower
(the setting of 20ms for the packet size (Delay) is recommended)
•
how to determine the jitter buffer depending on these points
IP audio settings
Jitter buffer
short
normal
long
auto
Action
Do not change
Audio Codec priority list
Prio1 .. Prio n
Codec
G.711A
G.711 µ
Action
G.729
Delay
Action
10 - 60
ms
Delete priority
TOS/DiffServ parameters
Bit 0 (off)
Bit 1 (off)
Bit 2 (off)
Bit 3 (on)
Bit 4 (off)
Bit 5 (off)
Bit 6 (off)
Before “useful communication” the IP telephone and IP Office “discuss” which shared
Codec to use. Setting of the Codec on the IP Office side occurs via the manager.
The Codec is selected according to the following rules:
•
The Codec set in the manager is always used, if it appears in the Prio list of the
IP telephone.
•
The Codec set under Prio 1 in the IP telephone is used for the manager setting
“autodetect” or for a Codec unknown to the IP telephone.