NEC MG-SIP Configuration Manual page 8

Addresses to single Global IP Address. There is no special equipment for performing IP Masquerade.
However, delay and bandwidth increase might be caused on the connection.
10. Feature Services available in the SIP network are described in Appendix A.
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11. When 3 -party SIP-based terminals (such as SIP Gateway, SIP Terminal, SIP Server) are used in the
SIP network, test these terminals in advance if they are available to use. Note that the terminal cannot
be managed as a station under IPX.
12. Additional services (such as REFER) on the SIP procedure are not provided in this system. See SIP
Message Support section for additional information.
13. Tone and holding tone to SIP network is generated by MG-SIP16. When MGC (PHI) external holding
tone is selected by ASYDL command, the information is provided via MGC.
14. When making a route for MG-SIP16, register the route for each MG-SIP16. A route cannot be shared
by multiple MG-SIP16s.
15. Before using MG-SIP16, it is required to register IP licenses by the AMGIL command. If the number
of IP licenses is not enough to use the SIP terminals, all the terminals cannot register to the system.
16. MG Registration Status can be displayed by using the DIMG command.
17. MGC transfers only Voice RTP Payload. Therefore, Jitter-Buffer Control, Echo Canceller, PAD
Control do not affect the connection. The connection is controlled by end points.
18. PB Receiver becomes invalid while receiving an announcement for AUTOMATED ATTENDANT
[A-82]/REMOTE ACCESS TO SYSTEM [R-2] when Incoming Call terminates to MG-SIP16.
19. MG-SIP16 does not support ring down service.
20. To use VLAN feature of MG-SIP16, connect Switch supporting VLAN feature. MG-SIP itself does
not support VLAN.
21. To use FAX communication feature of MG-SIP16, specify the FAX settings by ARTI/ARTIN
command.
The FAX communication has constraints as follows:
• FAX communication can be established only when G711 is assigned to payload for Voice and FAX.
• FAX communication can be established only when Payload Sizes for Voice and FAX are the same.
• To establish FAX communication with SIP network via MG-SIP16, be sure to assign G711 as
Payload
Type for all the FAX accommodated in the system.
22. The following provides the port number to be used in this system. If the firewall is applied to in your
network, unblock the following ports.
MG-SIP Page 8 of 75 5/8/2009