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Switches S2-1 and S2-2:  Data Rate

Switches S2-1 and S2-2 are set in combination to determine the

synchronous data rate for the Model 1075.

S2-1

S2-2

Setting

Off

On

32 kbps

On

Off

56 kbps

On

On

64 kbps

Switches S2-3 and S2-4:  System Clock Mode

The setting for switches S2-3 and S2-4 determines the transmitter

clocking mode for the Model 1075.

S2-3

S2-4

Clock Mode

Description

On

On

Internal System 

clock 

generated internally

On

Off

External (DTE)

System clock derived
from terminal interface

Off

On

Receive Recover

System clock derived
from the received line
signal.

Switch S2-5:  Carrier Control

S2-5

Carrier

Description

Off

Always On

Transmitter is always ON

On

Follows terminal 

Transmitter controlled by “Control” 
signal from X.21DTE (or by 
“Indication” signal from X.21 DCE) 

Switches S2-6 and S2-7:  Not Assigned

Switch S2-8:  Front Panel Switch Enable/Disable

Switch S2-8 determines whether the front panel switches may be

used to perform diagnostic functions.

S2-8

Activation

Description

On

Enabled

Front panel switches may be used 
to activate/terminate diagnostics.

Off

Disabled

Front panel switches will have no 
effect on operation of the unit.

6

3.1.1  Configuration Switch Set “S1”

The switches on Switch S1 set V.54 Test Functions.   Default

settings and detailed descriptions for each switch are shown below. 

Switches S1-1 through S1-7:  Not Assigned

Switch S1-8:  V.54 Test Functions

Switch S1-8 enables or disables the Model 1075 V.54 loopback

test modes. 

S1-8

Activation

Description

Off

Enabled

V.54 test functions enabled

On

Disabled

V.54 test functions disabled

3.1.2

Configuration Switch Set “S2”

The switches on Switch S2 set data rates, clock source, carrier

control and front panel switch operation.  Default settings and detailed
descriptions for each switch are shown below.  

S1 SUMMARY TABLE

Position

Function

Factory Default

S1-1 thru S1-7

Not Assigned

Off

S1-8

V.54 Test Functions

Off

Enabled

S2 SUMMARY TABLE

Position

Function

Factory Default

S2-1

Data Rate

On

S2-2

Data Rate

Off

S2-3

Clock Mode

On

S2-4

Clock Mode

On

S2-5

Carrier Control

Off

Forced On

S2-6

Not Assigned

Off

S2-7

Not Assigned

Off

S2-8

Front Panel Switches

On

Enabled

56 kbps

}

5

Internal

}

Summary of Contents for KiloModem II 1075

Page 1: ...Modem II AC Powered High Speed X 21 Short Range Modem SALES OFFICE 301 975 1000 TECHNICAL SUPPORT 301 975 1007 http www patton com Part 07M1075 B Doc 054081U Rev C Revised 1 23 08 C E R T I F I E D An...

Page 2: ......

Page 3: ...ontainer This number may be obtained from Patton Electronics Technical Service 301 975 1007 http www patton com or support patton com NOTE Packages received without an RMA number will not be accepted...

Page 4: ......

Page 5: ...16 external switches are grouped into two eight switch sets and are externally accessible from the underside of the Model 1075 See Figure 1 The two sets of DIP switches on the underside of the Model 1...

Page 6: ......

Page 7: ...terminal interface Off On Receive Recover System clock derived from the received line signal Switch S2 5 Carrier Control S2 5 Carrier Description Off Always On Transmitter is always ON On Follows ter...

Page 8: ......

Page 9: ...e 6 below The X 21 DCE DTE strap is located near the DB 15 connector on the PC board The arrows on the top of the strap indicate the configuration of the Model 1075 For example if the DCE arrows are p...

Page 10: ......

Page 11: ...pair interface 2 To function properly the Model 1075 needs two twisted pairs of metallic wire These pairs must be unconditioned dry metallic wire between 19 and 26 AWG the higher number gauges may li...

Page 12: ......

Page 13: ...d with the standard version of the Model 1075 is a wall mount type and may be plugged into any approved 120 VAC wall plug 230 VAC Power IEC The 230 VAC adapter supplied with the international version...

Page 14: ......

Page 15: ...nal equipment is operating properly and can be used for a test If a fault is indicated call a technician or replace the unit C Perform a Bit Error Rate BER test on each unit If the BER test equipment...

Page 16: ......

Page 17: ...terfaces CCITT ITU X 21 Data Rates 32 56 and 64 Kbps switch selectable Isolation 1500V RMS via isolation transformers Surge Protection IEC 801 S Level 2 1kV Carrier Control Constantly on or Controlled...

Page 18: ......

Page 19: ...Female Pin Signal Source 1 Shield 2 Transmit a DTE 3 Control a DTE 4 Receive a DCE 5 Indication a DCE 6 System Clock a DCE 7 8 Signal Ground 9 Transmit b DTE 10 Control b DTE 11 Receive b DCE 12 Indic...

Page 20: ......

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Page 23: ......

Page 24: ...from you Please contact us in any of the following ways to tell us how you like this product and how we can meet your product needs today and in the future Web http www patton com Sales E mail sales...

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