Network Extension Application; Dip Switch Configuration - Patton electronics IM1/K User Manual

3.2 NETWORK EXTENSION APPLICATION

Network Extension mode is used to extend nx64 -2.048Mbps
G.703/G.704 service across a DSL link, providing an nx64
G.703/G.704 link at the remote site. Transmitter clocking is
derived from the G.703/G.704 network, and transmitted over the
baseband modem link (refer to Figure 2, below).
K Module and
mDSL Modem
nx64kbps
External
G.703/G.704
Clocking
Network
Clock/
Data
Clock/
Data
K Module
1095
(1095RC)
Figure 2. Clock Settings in a Network Extension Application
K Module and
mDSL Modem
nx64kbps
External
Clocking
G.703/G.704
set to Force CP
Cable Span
Clock/
Data
Clock/
Data
1095 K Module
(1095RC)
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switches and jumpers. Sections 4.1 and 4.2 describe all switch and
jumper configurations for the Patton K Module. Section 4.3 describes
the configuration required for your mDSL modem.

4.1 DIP Switch Configuration

The DIP switches can be configured as either "On" or "Off." See
Appendix D for location and orientation of the DIP switches.
CPE
Switch S1-1: Line Coding
these options to be the same as the Line Coding that has been provid-
ed by your Service Provider.
Line Coding Options:
Switch S1-2 : CRC-4 Multiframe
When CRC-4 is enabled (ON), the unit synchronizes to the CRC-4
multi-frame protocol.
The K Module features configuration capability via hardware
The K Module has eight internal DIP switches (S1-1 through S1-8).
Use Switch S1-1 to control the Network Line Coding options. Set
S1-1 Line Framing & Coding
Off HDB3
On AMI
High Density Bipolar 3 (HDB3): In HDB3 coding, the transmitter
deliberately inserts a bipolar violation when excessive zeros in the
data stream are detected. The receiver recognizes these special
violations and decodes them as zeros. This method enables the
network to meet minimum pulse density requirements. Use HDB3
unless AMI is required in your application .
Alternate Mark Inversion (AMI): AMI coding does not inherently
account for ones density. To meet this requirement, you should
ensure that the data inherently meets pulse density requirements.
CRC-4 Multiframe uses Time Slot zero to carry CRC-4 information.
S1-2 Option
Off Disabled
On Enabled
NOTE: When the data rate is set to 2048 Kbps, K Module trans-
mits user data on all 32 timeslots, ignoring framing information. In
this case, Switch S1-2 will be ignored.
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