OmniPCX Enterprise
APPENDIX 2
REMARKS & RESTRICTIONS
INSTALLATION PROCEDURE FOR VERSION
J1.410.34.c – RELEASE 10.0
TC1449 16 Ed. 02 / 22 June 2011
7. VoIP
− The echo delay can no more be managed. It is set automatically according to the hardware
used:
• GIP6-GIP6A-MCV8-MCV24 board: the echo delay is limited to 32 ms.
• GIP4-1/GIP4-4/MADA-1/MADA-3/Armada board: the echo delay is limited to 128 ms.
− LIOE.
The H323 protocol over LIOE is no longer supported from Release 6.0 since LIOE and TSC-LIOE
boards are no longer supported. When migrating to Release 8.0.1, the LIOE boards must be
replaced by INTIP2 boards. They also must be replaced in case of an heterogeneous network.
In a network with R8.x nodes, there must not be LIOE and TSC-LIOE boards.
− Direct RTP H323.
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".
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)
− Direct RTP in network.
It is used with IP devices (IP Phones, Alcatel 4980 IP Telephony, GDx, GAx, 4645 voice mail,
INTIPx, H323 equipment and H323 Gateways); it allows to establish a direct RTP communication
between the 2 IP-devices over the network in order to optimize the number of
compressions/decompressions.
• The DPNSS prefix for path replacement must be systematically managed.
• The configuration must be homogeneous in the whole network; reboot of the system is
mandatory after activation of this feature.
• Direct RTP in network is available with H323 terminals or H323 Gateway if all nodes are in
Release 7.0 or higher.
• Fast start must be activated with LIOE boards.
• NGP boards support only the "Direct RTP in network" mode.
As of Release 9.1, the Direct RTP mode parameter in "IP / IP Parameters" has been
suppressed and the Direct RTP mode in network activated in all cases: the non Direct
RTP mode in network is no more possible. This rule applies for both new systems and
systems upgraded from older releases to release 9.1. The other nodes of the ABC-F
network must be managed accordingly. All the Alcatel-Lucent devices used must support
this mode.
− Multi-node transit without compression/decompression like in OmniPCX 4400: this optimization
is not implemented in OmniPCX Enterprise; in place, direct RTP in network is provided.
− It is not possible to create several IP trunk groups for a GDx/GAx/INTIPx board => use the VPN
Call Limitation feature to limit the number of calls per direction.
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