Patton electronic 2720 user manual Switch S2-6 and S2-7 Clock Mode, Switch S2-8 Reserved Switch S1

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Switch S2-6 and S2-7: Clock Mode

Set Switch S2-6 and S2-7 to determine the 2720’s transmitter tim-

ing.

S2-6

S2-7

Clock Mode

Off

Off

Network Clock. Transmitter timing is

 

 

derived from the received line signal.

On

Off

Internal Clock. Transmitter clock is

 

 

derived from an internal oscillator.

NOTE 1: When using the Model 2720 as a high-speed short range modem, one unit of the link must be configured in Internal Clock mode, and the opposite end unit must be configured for Network Clock mode.

If the ERR LED on the front of the unit is flashing (or on) it could be an indication of a clocking problem. Double check your clock mode settings and Tx Clock Invert S1-3 settings.

Switch S2-8 Reserved

3.1.2 Switch S1

The chart below shows the default configurations for Switch S1. A description of all S1 options follows this table.

S1 SUMMARY TABE

 

Position

Function

Factory Default

Selected Option

 

 

 

 

 

 

 

 

 

 

 

S1-1

RDL Type

On

 

V.54 RDL

 

S1-2

Reserved

On

 

 

 

 

 

 

 

S1-3

Tx Clock Invert

Off

 

 

Normal

 

 

 

 

 

 

 

 

S1-4

Line Build Out

Off

 

 

 

 

 

 

 

 

0dB

 

 

 

 

S1-5

 

Off

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S1-6

Reserved

Off

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S1-7

Reserved

Off

 

 

 

 

 

 

 

S1-8

Reserved

Off

 

 

 

 

 

 

Switch S1-1: RDL Type

Switch S1-1 selects the type of Remote Digital Loopback that the 2720 will initiate when the RDL is initiated from this unit. The 2720 will respond to both the V54 and the CSU loopback regardless of the setting of S1-1

S1-1

RDL Type

On

Initiate a V.54 RDL loop when selected

Off

Initiate a CSU loopback when selected

Switch S1-2: Reserved

11

12

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Contents
User Manual Radio and TV Interference Table of ContentsWarranty Information Warranty Statement FCC Information Industry Canada Notice FCC Part 68 Compliance Statement General Information Service InformationFeatures CE NoticeApplications S2 Summary Table Switch S1-2 Reserved Switch S2-6 and S2-7 Clock ModeSwitch S2-8 Reserved Switch S1 Switch S1-1 RDL TypeVT100 Switches S1-4 and S1-5 Line Build OutSwitch S1-6 Through S1-8 Reserved Software ConfigurationHelpful Hints Introduction to Main MenuLine Format ESF default Options ESF, D4, Unframed System ConfigurationDS0 Line Rate 64kbps default Options 64kbps, 56kbps Line Coding B8ZS default Options AMI, B8ZS, B7ZSOptions Network, Internal, External ESF Carrier Loops Enabled default Options Enabled, DisabledDefault Config Source Switch default Option EEPROM, Switch 54 Loops RDL Only Enabled default Options Enabled, DisabledSpacebar System DiagnosticsLocal Loop Idle default Remote Loop Idle defaultNI Status Test Pattern Idle default Options Idle or SendingError Insertion Off default Options On, Off Selected PatternRx PRM Error CountersCurrent DIP Switch Settings Valid Interval Count & Current Interval TimeUnit Information PasswordLoop Timeout Set to Default ConfigurationConnecting the 10Base-T Ethernet Port to a Hub Connecting the 10Base-T Ethernet Port to a PC DTET1/FT1 Interface Connection Status LED DescriptionsT1 Link 10BT LinkModel 2720/I Loop V.54 & Telco DiagnosticsOperating Local Loopback LL T1/FT1 CSU/DSUQrss BIT Error Rate V.52 DiagnosticsEthernet 10BASE-T Specifications Patton NETLINK-T1 Model SpecificationsRJ-48C T1 DS0 Network Interface Female Modular Jack Signal Direction Tip Tx DataRS-232 Control Port Signals at DB-9 Connecter Patton NETLINK-T1 Model Interface PIN Assignment
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