Quadro6L/4L Manual I: Installation Guide
Step 1: Installing the Quadro
Step 1: Installing the Quadro
Networking Overview
To establish a connection between the Internet and your local area network (LAN), an ac-
cess router is needed. The Quadro6L/4L may serve, among other functions, as an access
router, and will perform the task of connecting your LAN, or a group of one or more PCs, to
the wide area network (WAN) or the Internet. The Quadro will process and regulate the da-
ta traffic between these two networks. The Quadro6L/4L has one LAN port that can con-
nect to Ethernet hubs and switches on the LAN, allowing additional devices to be con-
nected to the network.
The Quadro is a device with two sides: one side connects to your LAN, and the other side
connects to the Internet, or the WAN. Quadro’s firewall and Network Address Translation
(NAT) functionality protects your LAN from being seen from the Internet side making the
LAN private and secure.
The Ethernet WAN port transmits up to 10 Mbps, and the LAN port transmits at 10 Mbps or
100 Mbps.
Every device within an IP network requires a unique IP address to identify itself. Since the
Quadro connects to both the LAN and the WAN, it has to be part of both networks, and
must have two IP addresses: one for the WAN side and one for the LAN side. The Qua-
dro’s integrated firewall/NAT functionality will hide the LAN IP address from the WAN (In-
ternet) side.
There are two ways of assigning an IP address: statically or dynamically.
A Static IP address is a fixed, manually assigned IP address that remains valid until
changed. If you plan to use the Quadro as your Internet access router, contact your Internet
Service Provider (ISP) to find out if a static IP address is assigned to your account. If so,
you will need this static IP address when configuring the Quadro device.
A dynamic IP address is a temporary address that is automatically assigned by your ISP
and will change periodically. If your ISP offers a dynamic IP address, the Quadro will act as
a DHCP client and will receive a new IP address from the ISP’s DHCP server or PPPoE
feature.
Please Note:
A DHCP client is a piece of software that requests an IP address from a
DHCP server. A DHCP server assigns on request a unique IP address to a device. The
Quadro, like many routers, acts as a DHCP client on its WAN interface and as a DHCP
server on its LAN interface.
The Quadro must be visible to the Internet to be able to receive and send VoIP calls. When
the Quadro is placed in a private network, typically behind existing routers, it will by default
attempt to pass through the NAT of this router with its STUN (Simple Traversal of UDP over
NAT) feature. STUN will work without user configuration with the majority of basic routers.
In some scenarios, port forwarding on the router is required to make the Quadro accessible
to other Quadro devices and the Epygi SIP Server on the Internet. Another configuration
option is to use the Quadro as the Internet access router, connected directly to the WAN,
eliminating the traverse to the local NAT firewall.
Quadro6L/4L; (SW Version 5.2.x)
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