33..00
C
CO
ON
NFFIIG
GU
UR
RA
ATTIIO
ON
N
The Model 1088/K is equipped with two sets of eight DIP switches,
which allow configuration of the unit for a wide variety of applications.
This section describes switch locations and explains all possible con-
figurations.
3.1 CONFIGURING THE HARDWARE DIP SWITCHES
The 16 external switches are grouped into two eight-switch sets,
and are externally accessible from the underside of the Model 1088/K
(See Figure 1, below).
The two sets of DIP switches on the underside of the Model 1088/K
will be referred to as S1 and S2. As Figure 2 shows, the orientation of
all DIP switches is the same with respect to “ON” and “OFF” positions.
5
Figure 2. Close Up of Configuration Switches (all sets are identical in appearance)
Figure 1. Underside of Model 1088/K, Showing Location of DIP Switches
Front
Rear
On
S1
S2
Off
3.1.1 Configuration DIP Switch Set “S1”
Switches S1-1 through S1-8 may be used to configure CO/CP
operation, line framing and coding, CRC-4 operation, and DTE initiated
loop diagnostics. Default settings of S1 Switches are shown in the
table below.
Switch S1-1: CO/CP
Use Switch S1-1 configure the CO (located at the Central Office or
or G.703/G.704 demarcation point) or CP (located at the Customer
Premises) mode of the 1088/K.
S1-1
CO/CP Mode
Off
CO = located at the Central Office
On
CP = located at the Customer Premises
CO/CP Configuration:
The Model 1088/K does not use clock mode settings as described
in other Patton mDSL products. Instead, the Model 1088/K will
always recover the clocking from the G.703/4 network and use this
clock to send data across the DSL span to the remote DSL
modem, which will use the incoming to send data out to G.703/4
network. Therefore, one unit must be set for CO mode (located at
the G.703 demarcation), and the other unit must be set for CP
mode (located at the customer premises). This type of clocking
method was employed for two reasons:
1) To allow two independent networks to use the modems as inde-
pendent clocking paths.
2) To allow the user to independently specify the timing source for
the network based on external equipment.
6
Position
Function
S1-1
CO/CP Setting
On
CP Mode
S1-2
Line Coding
Off
HDB3
S1-3
CRC-4 Enable
Off
Disabled
S1-4
Reserved
Off
S1-5
Reserved
On
S1-6
Reserved
Off
S1-7
Reserved
On
S1-8
Reserved
Off
Factory Default
S1 SUMMARY TABLE
OFF
ON
