Installation guide

Quadro Manual I: Installation Guide Step 1: Installing the QuadroCS
Step 1: Installing the QuadroCS
Networking Overview
To establish a connection between the Internet and your local area network (LAN), a sepa-
rate access router is needed. The Quadro products are an excellent choice for this function.
The QuadroCS can serve as an access router for a single PC used during configuration,
but it is not recommended to be used as the primary Internet access router for your com-
pany’s LAN. The QuadroCS has one LAN port that can be connected to Ethernet hubs and
switches on the LAN allowing more devices to reach the QuadroCS for configuration.
Every device within an IP network requires a unique IP address to identify itself. Since the
QuadroCS 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
QuadroCS’s integrated firewall/NAT functionality will hide the LAN IP address from the
WAN (Internet) side.
There are two ways of assigning an IP address: statically or dynamically. The Quadro CS
can be configured with a static IP address on the WAN interface. You also can use a DHCP
server-assigned IP address on the WAN side.
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 QuadroCS must be visible to the Internet to receive and send VoIP calls. When the
QuadroCS 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 the basic
routers. In some scenarios, port forwarding on the router is required to make the QuadroCS
accessible to other Quadro devices and the Epygi SIP Server on the Internet. The recom-
mended configuration option is to connect the QuadroCS directly to the Internet eliminating
the need to traverse the local NAT firewall.
QuadroCS (SW Version 3.1.x) 8