NEC UNIVERGE SV9100 Manual page 83

DT700 Terminals using NAPT Enhancement must be at firmware V3.0.0.0 or above.
The NAT router on the SV9100 side must have a static WAN IP address, UPNP is not supported.
UC Client softphone is not supported.
Wireless phone (MH240) is not supported.
If NAT enabled phones become unresponsive after being idle, the timer in Programs 84-23-01 and 84-
23-02 may need to be changed to a shorter interval.
It is necessary to set Program 10-46-14 to OFF when the GPZ-IPLE is assigned a global (public) IP
address.
When Program 10-46-14 is set to ON, it references programs 10-58-01 and 10-58-02 for terminals
connected via a local router.
NAPT can be used for SIP trunks and terminals on the same system.
Multicast RTP packets cannot be set to an extension using the NAPT feature (ExMOH, BGM, and Room
Monitor).
Restrictions – Static NAT
A contract for static IP addresses is required for a WAN-side IP address specified for the NAT
router on the terminal side.
The NAT router on the terminal side must have the function for setting up static NAT.
A conversion table must be manually set up for the NAT router on the terminal side.
The table must be set up so that that the NAT router only converts IP addresses, not port numbers.
IP addresses for terminals have to be specified statically. When allocating an IP address using
DHCP, the IP address might change. NEC does not guarantee proper operation in this case.
If installing multiple terminals in the domain of the NAT router on the terminal side, the SIP port
number and RTP/RTCP port number for each terminal must be specified so as to avoid
overlapping.
The SIP server cannot be switched. (Only one address can be registered as the SIP server.)
Restrictions – Dynamic NAT
The NAT router on the terminal side must have the function for setting up dynamic NAT.
Restrictions - Dynamic NAT
The NAT router on the terminal side must have the function for setting up dynamic NAT.
The beginning of the voice may cut depending on the network environment. And for this reason, a
warning sound may rumble in the ear piece at the beginning of the call. If you want to avoid this
warning, you must set program 15-05-3 to 0.
It is assumed that port numbers are not changed by the NAT router on the terminal side.
If a port number is changed by NAT router, NEC does not guarantee proper operation.
If installing multiple terminals in the domain of the NAT router on the terminal side, the SIP port
number and RTP/RTCP port number for each terminal must be specified so as to avoid overlapping.
Peer to Peer is only possible for IP terminals under the same router.
When negotiation of a call has been completed. If GPZ-IPLE does not receive an RTP packet within 10
seconds of call setup, the call is disconnected. When this occurs the below message is displayed on
the terminal LCD.
Part 2: VoIP Manual 83