Expert Documentation

Chapter 6
- Registration requested (yes/no): indicates if registration is required
- Reg. expire time: timeout used to refresh registration periodically (by default, 3600
seconds)
- Username: username (login) for authentication
- Shared secret: password associated with the username for authentication
- IP Address: Registrar's IP Address
from R6.0 and higher,
- Registered Username: Username used for registration
- Port: UDP number for REGISTER request
- Registered Realm
6.4.3.4 Configuring SIP Gateway
6.4.3.4.1 Hardware configuration
SIP Gateway is an application layer which works as an interface between IP telephony (SIP
stack) and switched telephony (Alcatel-Lucent OmniPCX Office Communication Server PBX
call manager).
Checking the VoIP Protocol
Since R8.0, SIP is set as the default VoIP protocol in Alcatel-Lucent OmniPCX Office
Communication Server. To check, and, if necessary, modify the VoIP protocol:
By OMC (Expert View): System -> Voice on IP -> VoIP: Parameters -> General tab
If the VoIP Protocol has been switched from H.323 to SIP, OMC asks you to reboot the
PowerCPU board.
Configuring the System as the SIP Gateway
By default, after initialization, all the DSP channels are assigned to the pool of VoIP subscriber
channels (IP telephony).
In a pure SIP gateway configuration, all the DSP channels of the PowerCPU board and the
ARMADA VoIP32 daughter board are used for "IP network" accesses.
By OMC (Expert View): System -> Voice on IP -> VoIP: Parameters -> General tab
Number of VoIP access channels (IP trunks): Number of channels for VoIP IP access, i.e. 1
DSP channel for 1 "network access".
Direct RTP: The direct RTP service provides direct RTP and RTCP flow exchange between IP
endpoints (IP sets, DSP channel on PowerCPU board, distant gateways).
To activate the direct RTP option, check the check box. This should be carried out when there
is no traffic on the system.
Note:
Each DSP channel placed in the "VoIP access" pool is considered as a "network access" by the PBX, i.e.
1 VoIP DSP = 1 B-channel. As there can be a maximum of 16 DSP channels on PowerCPU board and
32 DSP channels on ARMADA VoIP32 daughter board, there can be no more than 48 VoIP access DSP
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