
Prestige 681 SDSL Router
3-4 WAN Setup
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 [
ENTER] to
select the matching transmission speed of the peer. The
Transfer Rate=
field is set
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.
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