NEC Univerge SV9100 Manual page 585

S 2 C
ECTION ONDITIONS
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11-12
NAPT is supported for DT800/DT700, and Standard SIP Terminals.
"License Exceeded" will display on the DT800/DT700 terminal when trying to
register a NAT phone, if the feature is not licensed.
Terminals using NAPT must be at firmware V3.0.0.0 or higher.
IP terminals can be connected via NAT router or WAN (direct connection).
The NAT router on the SV9100 side will require port forwarding.
K-CCIS IP does not use NAPT translations.Softphone (SP310) is not supported.
If NAPT enabled phones become unresponsive after being idle, the timer in PRG
15-05-47 and 15-05-48may need to be changed to a shorter interval. NAPT
terminals will ignore the timers in PRG 84-23-01 and 84-23-02 and use the timers in
PRG 15-05-47 and 15-05-48 instead.
It is necessary to set Program 10-46-14 to OFF when the 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. These programs are used to define any destination networks that do not get
sent through the NAPT translations.
UDP ports in the remote routers may be required to be forwarded to the IP
Terminals.
NAPT can be used for SIP trunks and terminals on the same system, however they
require the same WAN Address in PRG 10-12-07.
When Program 15-05-45 is set to "1" the manual table setting for port forwarding
may not be required on the remote side Router B, but the router must support the
NAT function setting itself. If Program 15-05-45 is set to "0" port forwarding at the
Remote side router is required.
The router may close the port being used if packet exchange is not performed
during a certain time frame. In this case, change Programs 15-05-47 and 15-05-48
to a shorter interval. These programs are changed on a per station basis. No- NAPT
phones will still use Programs 84-23-01 and 84-23-02 while only NAPT phones will
use Programs 15-05-47 and 15-05-48.
The SIP-ALG or similar SIP application function of all routers/firewalls in the network
must be disabled.
After starting SIP negotiation for the call, if any RTP packet can't be received from
the terminal within 10 seconds, the call is dropped and the IP Terminal displays the
following:
Issue 2.0
NAPT