Setting Up The Wan Link - ZyXEL Communications Prestige 681 User Manual

Prestige 681 SDSL Router
3.2

Setting up the WAN link

You configure SDSL and Frame Relay settings in Menu 2 – WAN Setup. You need to know the following
information.
Q.1. Is your P681 acting as a SDSL server or as a client (see Figure 1-1, Figure 1-2 and Figure 1-3)? If
acting as a SDSL server, then select Server (Central Office) from the Service Type field. If acting as
a client, then select Client (Remote Terminal) from the Service Type field.
Q.2. Is your SDSL link compatible (Link Compatibility field) with Ascend/Lucent or Copper
Mountain? The major SDSL players at the moment are Ascend (now part of Lucent) and Copper
Mountain and each use different methods for finding the transmission speed of the peer. Copper
Mountain compatible devices do this automatically, but it must be done manually for Ascend/Lucent.
Q.3. What is the actual transmission rate? The P681 SDSL router supports symmetrical multi-rate data
transmission speeds from 144Kbps up to 2320Kbps for Ascend/Lucent Link Compatibility or from
160Kbps to 1,568Kbps for Copper Mountain Link Compatibility. You can increase the capacity of
the Internet connection (within certain limitations) without changing your ISP or buying new
equipment. Note that these tables outline the distance limitations only and do not mean that distance
determines the actual transmission speed agreed between you and the peer. Both the Prestige and the
peer must have the same transmission rate. For Ascend/Lucent Link Compatibility press the
[SPACEBAR] in the Transfer Rate= field to step through the transmission speed options and then
press [ select the matching transmission speed of the peer. The Transfer Rate= field is set
ENTER] to
automatically (Auto - and is not selectable) if you chose Copper Mountain in the Link
Compatibility field
The following tables outlines distance limitations on data transmission rates for both Copper Mountain
and Ascend/Lucent Link Compatibility using wire gauge AWG 26 (0.4mm) based on lab tests in
ZyXEL. AWG (American Wire Gauge) is a measurement system for wire that specifies its thickness. As
the thickness of the wire increases (the AWG number decreases) the further you can transmit. Therefore
distances for wire gauge AWG 24 should be further for any given transmission rate. Please note that line
quality, noise etc. also influence attainable data transmission rates and that the transmission rates in the
tables below are meant as a reference and not a guarantee of rates attainable.
3-4 WAN Setup