Abc-F2 Compatibility Depending On The Hardware And The Type Of Configuration Used (With Or Without Compressed Voice); Rules Used In The Tables - Alcatel-Lucent OmniPCX Enterprise Manual

For GD3/GA3/INTIP3 boards:
In G711
approx. 71 ms
7.4 ABC-F2 compatibility depending on the hardware and the type of configuration
used (with or without compressed voice)
The table in paragraph
quality to be obtained (greater than index 3 of the MOS). The prohibitions in the table are not
linked to problems setting up calls, only to obtaining an acceptable audio quality.
In this table you will find a summary of the different configurations authorized in ABC-F2 (from an
audio point of view) between Releases 5.1 and 10.0. This table takes into account both a connection
in VoIP and a T2, T0 or T1 type wire connection.

7.4.1 Rules used in the tables

Note
In this document, "Direct RTP" corresponds to "Direct RTP in network".
•
A maximum delay of 200 ms "One way" (one way, IP equipment + network) is authorized
through IP (400 ms in Round Trip Delay). Beyond that, voice quality deteriorates.
•
There can not be more than two passages in G711 during a call.
•
The LIO P/B/X boards are prohibited once there are Media Gateway boards (except in
certain cases where the connection is made through a Crystal IP Media Gateway).
•
The LIOE are not supported since Release 6.0 nor on any node of a network cohabiting with
Release 7.1 (whatever their versions even they allow it) minimum.
•
H323 terminals are only compatible with configurations which allow to have a maximum delay
of 200 ms "One way".
• Direct RTP is available for H323 equipment and all OmniPCX Enterprise Gateways (GDx, GAx,
INTIPx) for voice and Fax T38.
•
The management of H323 direct RTP on OmniPCX Enterprise must be carefully enabled since all
H323 terminals of the installation must be able to reroute the H245 RTP flow called "Empty
Terminal Capability Set" or "Voice Path Replacement".
•
In ABC-F networked configuration, all the nodes must be in Release 7.1 minimum to benefit the
direct RTP for H323 terminals on all the nodes.
•
No direct RTP between SIP set and a H323 terminal.
•
No direct RTP between H323 terminals with different compression algorithms (for instance case
of H323 terminal in G723 or G729 calling a 4645 in G711).
• Only a single compression & decompression is authorized with GD/INTIP boards (use of
the G723/G729 algorithm and one or two transits). Two compressions/decompressions are
authorized only in cases of a call on VPN overflow (only used in an emergency).
•
In configuration full NGP, a double compression & decompression will correspond to a
MOS of 3.4 (resp. 3.6) in G729 (resp. G723). Configurations with more compression &
decompression will lead to a one way delay higher than 200 ms and thus are not authorized.
TC1449
OmniPCX Enterprise
In G729
approx. 72 ms
7.4.2 presents cases of connection allowing an acceptable audio
26
INSTALLATION PROCEDURE FOR VERSION
J1.410.34.c – RELEASE 10.0
In G723
approx. 95 ms
Ed. 02 / 22 June 2011