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High Speed Base Band Modems

Desktop Versions

for faster transmission

U S E R G U I D E

Ascom part no:
1/265/001/610
Issue 02 – May 2001

Summary of Contents for AM 64/1024A

Page 1: ...High Speed Base Band Modems Desktop Versions a for faster transmission U S E R G U I D E Ascom part no 1 265 001 610 Issue 02 May 2001...

Page 2: ...s is a CLASS 1 product and must be connected to a safety earth through its mains lead 2 This apparatus must be installed and maintained by SERVICE PERSONNEL 3 Disconnect the mains plug and the NTP lin...

Page 3: ...compatible a Analogue Baseband connection up to a rate of 1024kbps b Digital X 21 connection up to a maximum rate of 1024kbps c Digital V 35 connection up to a maximum rate of 1024kbps d Digital X 21b...

Page 4: ...6 4 2 3 X 21 31 6 F R O N T P A N E L M E N U S Y S T E M 2 5 5 T R O U B L E S H O O T I N G 2 1 ASCOM USER GUIDE High Speed Base Band Modems 5 6 5 STATUS MENU 32 6 5 1 Unit Status 32 6 5 2 Alarms 3...

Page 5: ...Way D type X 21 V 11 Connector pin allocation 51 8 1 2 Module Link Settings 51 8 1 3 External Timing 52 8 2 X 21 BIS V 24 V 28 53 8 2 1 25 Way D type X 21 bis V 24 V 28 Connector pin allocation 53 8 2...

Page 6: ...le pair modem is used it applies to any of the following AM64 128EA AM64 384A AM64 512A Wherever the term two pair modem is used it applies to the following AM64 768A AM64 1024A The modems optimise th...

Page 7: ...basic applications 2 2 1 Desktop modem to desktop modem with no external timing Either end of the link may be master with the opposite end being the slave The timing originates from the internal clock...

Page 8: ...ED Amber LED is lit when new configuration settings have been made but not committed to memory Menu Select Buttons Right and Left arrow buttons scrolls menus in the LCD display Item Scroll Buttons Up...

Page 9: ...03 for V 35 interface XX 04 for V 36 interface XX 05 for RS530 interface XX 06 for G 703 interface XX 07 for modem without interface 4 1 2 Ordering Information for User Interface Modules Replacement...

Page 10: ...ble not supplied Mains Connection supplied with correct plug 4 16 ASCOM USER GUIDE High Speed Base Band Modems 4 2 CONNECTING THE HIGH SPEED MODEM Connect the mains lead into the IEC type socket on th...

Page 11: ...te that the user interface connector on the rear of the unit is wired such that the modem is a DCE Data Circuit terminating Equipment If the modem is required to act as a DTE Data Terminating Equipmen...

Page 12: ...data transfer lines incorrect necessary set the to on e g for V 28 circuits 108 and 105 should be on for data transfer If the lines are not used a range of clamping operations are possible See section...

Page 13: ...5 2 DEFAULT CONFIGURATION The modem has a default configuration and reverts to this when 1 The interface module has been changed 2 The stored configuration has become corrupted This could occur if po...

Page 14: ...ed in one operation Note that changes will be discarded if the menu is exited or the unit is left idle for 1 minute If changes have been made an extra item Program Items will appear at the bottom of t...

Page 15: ...d Base Band Modems 6 2 MENU STRUCTURE The items in each menu are as shown below There are two inactivity timeouts in the menu system Three seconds after selecting a menu heading the first option of th...

Page 16: ...3 6 Transmit power The modem can have two power settings Auto This is the normal mode of operation the modem transmits 13 5dBm of power into a 135 ohm load Power 7 5dBm This is a low power setting to...

Page 17: ...follow the condition of 108 108 1 Set On Clamps line 108 permanently ON 6 4 2 3 X 21 For this interface the following option is available C Set On Clamps C circuit permanently ON 6 30 ASCOM USER GUIDE...

Page 18: ...display also gives an indication as to the progress of any start up sequence When the unit is trying to synchronise it will display a series of asterisks The sequence starts with one asterisk and end...

Page 19: ...unauthorised tampering with the modem configuration the front panel controls can be disabled This MENU item shows the status of this feature It s also possible to change the setting from this menu it...

Page 20: ...rack modems in the data path will also pass through the loop request Slave modem Master modem Master modem Slave modem Loop request here Loop applied here Network Interface Interface loop requested f...

Page 21: ...38 ASCOM USER GUIDE High Speed Base Band Modems 6 6 5 Data Test This mode allows the user to send a PRBS Pseudo Random Binary Sequence pattern to the remote modem and monitor the received data stream...

Page 22: ...ed Now type the first letter of the access level that you require e g for User type u followed by a SPACE and then the associated password using the correct case and then press RETURN When you have lo...

Page 23: ...HANGING VALUES To access other screens you can return to the Screen Menu again by typing CTRL V and then choosing the required screen by typing its associated letter Use TAB to move around the items o...

Page 24: ...r s site unless security is not an issue AM64 1024A V3 0 Password Status No Sync Guest User Techie Supervisor x Use Password x DCD Logout Auto logout mins 5 NOT logged in Logout 7 44 ASCOM USER GUIDE...

Page 25: ...front panel Test Menu except Data test see Test Counts In service test see test Counts and Self test It also provides the line quality information Options Provides options for locking unlocking the f...

Page 26: ...the values are frozen when None is selected See section 6 6 5 for an explanation of these figures In addition to the features provided by the front panel controls it s possible to generate a user sele...

Page 27: ...y when logged in at Supervisor level is it possible to see and modify the user passwords To change a password use the UP or DOWN ARROWs or TAB to move the cursor to the required password and then ente...

Page 28: ...ignal Element Timing DCE Generator 17 115 Receiver Signal Element Timing DCE Generator 21 140 Remote Loopback for Point to Point circuits Load 18 141 Local Loopback Load 25 142 Test Indicator Generato...

Page 29: ...A Interface Module Top View 3 3 J1B MRAC Connector 8 54 ASCOM USER GUIDE High Speed Base Band Modems The circuit 105 circuit 109 crossover may not be necessary if circuit 105 is clamped to the on posi...

Page 30: ...igh Speed Base Band Modems 8 4 RS530 8 4 1 25 Way D type RS 530 Connector pin allocation Standards dictate that the control circuit 107 may be implemented as a balanced circuit using both A and B wire...

Page 31: ...and Modems 8 4 3 External Timing If External timing is required i e the modem is to be used as a DTE then a change over cable will be required as shown in the diagram below 8 5 X 21 BIS V 36 8 5 1 37...

Page 32: ...the diagram below 8 6 G 703 CODIRECTIONAL 64K 8 6 1 9 Way D type Connector pin allocation 8 6 2 Module Link Settings There are no links with this module 8 6 3 External Timing G 703 has timing embedde...

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