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Prestige 2602RL-D3A Support Notes
All contents copyright (c) 2007 ZyXEL Communications Corporation.
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Can the Prestige SUA handle IPsec packets sent by the VPN gateway behind Prestige?
Yes, the Prestige's SUA can handle IPsec ESP Tunneling mode. We know when packets go through SUA, SUA
will change the source IP address and source port for the host. To pass IPsec packets, SUA must understand the
ESP packet with protocol number 50, replace the source IP address of the IPsec gateway to the router's WAN IP
address. However, SUA should not change the source port of the UDP packets which are used for key
managements. Because the remote gateway checks this source port during connections, the port thus is not
allowed to be changed.
How do I setup my Prestige for routing IPsec packets over SUA?
For outgoing IPsec tunnels, no extra setting is required. For forwarding the inbound IPsec ESP tunnel, A
'Default' server set in menu 15 is required. It is because SUA makes your LAN appear as a single machine to
the outside world. LAN users are invisible to outside users. So, to make an internal server for outside access, we
must specify the service port and the LAN IP of this server in Menu 15. Thus SUA is able to forward the
incoming packets to the requested service behind SUA and the outside users access the server using the
Prestige's WAN IP address. So, we have to configure the internal IPsec as a default server (unspecified service
port) in menu 15 when it acts a server gateway.
PSTN Lifeline FAQ
What is P2602 and what is the difference between P2602R and P2602RL?
P2602R is a SIP based VoIP analog telephone adapter. It allows you to send voice signals over the Internet or
VoIP of IP via SIP protocol which is an internationally recongnized standard for VoIP Technology.
The main difference between P2602R and P2602RL is in Lifeline support. P2602RL supports PSTN lifeline
function. A PSTN lifeline allows you to have VoIP phone service and PSTN phone service at the same time.
What does Lifeline mean?
Lifeline means the ability to read specified emergency rescue authority (Police, Fire department etc.) as you can
do on regular phone line in case emergency even if P2602RL loses power.
Do I need Lifeline?
Not everyone needs lifeline support on VoIP telephone adapter. It depends on the government authority or
ITSP provider. As in some countries lifeline support are mandatory by law.