Using File Coders With Different Channel Coders - AudioCodes Mediant 600 User Manual

SIP User's Manual
13.2.3.1.9 Record Files Using LBR
You may record a file using low bit rate coders for *.wav and *.raw files.
Notes:
13.2.3.1.10 Modifying Streaming Levels Timers
Several parameters enable the user to control streaming level timers for NFS and HTTP
and also the number of data retransmission when using NFS as the application layer
protocol:
General command timeout – ServerRespondTimeout: Defines the maximal time a
command or respond may be delayed. This relates both to HTTP commands (GET,
PUT, POST, HEAD etc.) and to NFS commands (create, lookup, read, write etc.).
Recording packet overruns timer – StreamingRecordingOverRunTimeout: An
overrun condition is one in which the device sends data to the server but does not
receive responds from the server acknowledging that it received the data. Overruns
relate to recording data to a remote server and result with "holes" in the recording. The
streaming level aborts sessions containing consecutive overruns as derived from this
timer. You may set the timer to longer periods than the default value, thereby enabling
the device to be more "tolerant" to overrun conditions.
Playing packet underruns – StreamingPlayingUnderRunTimeout: An underrun
condition is one in which the device does not supply the DSPs with sufficient data, thus
"starving" the DSPs. Underruns relate to playing data from a server to the device
where, due to environmental conditions (usually network problems), the data is not
passed quickly enough. This condition results with broken data passed to the user.
The streaming level aborts sessions containing consecutive underruns as derived from
this timer. You may set the timer to longer periods than the default value, thereby
enabling the device to be more "tolerant" to underrun conditions.
NFS command retransmission – NFSClientMaxRetransmission: Defines the number of
times an NFS command is retransmitted when the server side does not respond. By
default, the value is set to 0 and not used - instead, the number of retransmissions is
derived from the server response timeout parameter and the current Recovery Time
Objective (RTO) of the system.
These parameters may be configured using the ini file, Web interface, or SNMP.

13.2.3.2 Using File Coders with Different Channel Coders

The tables in the following subsections describe the support for different combinations of
file coders (used for recording or playing a file) and channel coders (used when opening a
voice channel).
The following abbreviations are used in the subsequent tables:
LBR: Low Bit Rate Coder
PCMU: G.711 µ-law coder
PCMA: G.711 A-law coder
Version 5.8
This feature is relevant for both NFS and HTTP.
605
13. Media Server Capabilities
September 2009