Paradyne 7520 DSU Installationshandbuch
TM
1
7520-A2-GN10-10 December 1998
Model 7520 DSU
Startup Instructions
Document Number 7520-A2-GN10-10
December 1998
Product Documentation on the World Wide Web
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Complete documentation for this product is available at www.paradyne.com.
Select
Service & Support
→
Technical Manuals
→
Subrate Digital Access
Devices.
Select the following document:
7520-A2-GB20
Model 7520 DSU User’s Guide
To request a paper copy of a Paradyne document:
Within the U.S.A., call 1-800-PARADYNE (1-800-727-2396)
Outside the U.S.A., call 1-727-530-8623
Package Checklist
Verify that your package contains the following:
A Model 7520 Single Port DSU
Power cord with power transformer
RJ48S modular cable for U.S. network access (14)
No DTE cables are provided. Additional cables may need to be ordered.
2 7520-A2-GN10-10
December 1998
Cables and Equipment You May Need to Order
If connecting . . . Order a . . .
A VT100-compatible terminal
to the Terminal port Standard straight-through EIA-232 cable with DB25
plug connectors on both ends.
A PC to the Terminal port Standard straight-through EIA-232 cable with a DB25
plug connector on one end and a DB9 socket
connector on the other end.
An External Modem to the
Terminal port Standard crossover EIA-232 cable with DB25 plug
connectors on both ends.
A DTE with a V.35 connector
to the 34-pin DTE port V.35 cable with an MS34 plug connector on one end
and an MS34 socket connector on the other end.
A DTE with a DB25 connector
to the 25-pin DTE port Standard straight-through EIA-232 cable with DB25
plug connectors on both ends.
Contact your sales or service representative to order these cables. For details,
refer to Appendix C,
Cables and Pin Assignments,
in the User’s Guide.
Site Preparation
Before installation, read the
Important Safety Instructions
on page 15.
Make sure you have:
A dedicated, grounded ac outlet that is protected by a circuit breaker within
6 feet of the access unit.
A clean, well-lit, and ventilated site that is free from environmental extremes.
One to two feet of clearance for cable connections.
An operable network connection.
An asynchronous terminal or PC with terminal emulation software.
3
7520-A2-GN10-10 December 1998
Installing Your DSU
97-15781
RJ48S
Jack
NETWORK
TERMINAL MANAGEMENT
POWER
D
T
E
DTE
EIA-232
Terminal
Connection
AC Adapter
Network
Connection
DTE
Connection
or V.35
4 7520-A2-GN10-10
December 1998
Installing the Power Cord
CAUTION:
Use no power supply except the one provided with the DSU. Using the
wrong power supply can destroy the DSU.
Procedure
1. Insert the power plug into the POWER jack.
2. Plug the power transformer into an ac outlet.
D
T
E
TERMINAL DTE NETWORK
POWER
97-15782
Power
Jack
Connecting the Terminal Port to an Async Terminal
Procedure
1. Insert the 25-pin end of the EIA-232 cable into the TERMINAL port.
2. Insert the other end of the cable into the VT100-compatible terminal.
3. Press Return on the keyboard to display the Main Menu.
D
T
E
TERMINAL DTE NETWORK
POWER
97-15783
To Connect to a PC
or Async Terminal
Terminal
Port
5
7520-A2-GN10-10 December 1998
NOTE:
Communications parameters on the Terminal port are 9.6 kbps, 8 bits per
character, one stop bit, and no parity.
Connecting to a DTE
Procedure
1. Insert one end of a 34-pin V.35 cable into the MS34 DTE port
–
or –
insert one end of 25-pin EIA-232 cable into the DB25 DTE port.
2. Insert the other end of the cable into the appropriate connector on your DTE.
D
T
E
TERMINAL DTE NETWORK
POWER
97-15784
DTE
DTE Port
or
Connecting to the Network
Procedure
1. Insert the 8-pin connector on the RJ48S network cable into the NETWORK
jack.
2. Insert the other end of the cable into the RJ48S modular jack.
D
T
E
TERMINAL DTE NETWORK
POWER
97-15785
RJ48S
Jack
Network
Interface
6 7520-A2-GN10-10
December 1998
Hardware Verification
Verify that the OK LED lights up.
Verify that the ALARM LED is off.
97-15786
NetworkSystem Port
CTS (106)
OK
ALARM
TEST
DM
OOS
OOF
NS
TXD (103)
RXD (104)
RTS (105)
DTR (108)
7520 DSU
Verify that the User Interface Idle screen is displayed on the terminal or PC.
Press the Enter key. Verify that the Main Menu appears.
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
main
Device Name: Model: 7520
MAIN MENU
Status
Test
Configuration
Control
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Ctrl-a to access these functions Exit
If the DSU fails to respond as described, refer to Chapter 6,
Messages and
Troubleshooting
,
in the User’s Guide.
7
7520-A2-GN10-10 December 1998
Identifying the Device and System
Use the Device Name screen to determine the name that will be displayed at the
top of all ATI screens, and system information that will be displayed on the
Identity screen. To access the Device Name screen, follow this menu selection
sequence:
Main Menu
→
Control
→
Device Name
main/control/device name
Device Name: Node A Model: 7520
DEVICE NAME
Device Name: Node A Clear
System Name: ________________________________________ Clear
System Location: ________________________________________ Clear
System Contact: ________________________________________ Clear
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Ctrl-a to access these functions, ESC for previous menu MainMenu Exit
Save
Î
Î
ÎÎ
ÎÎ
Fields on the Device Name screen are null until you enter values. Allowable
values are any printable ASCII character.
Saving Configuration Options
When changes are made to the configuration options, the changes must be
saved to take effect. Use the Save key or Save Configuration screen.
Procedure
To save configuration options changes:
1. Press Ctrl-a to switch to the screen function key area below the dotted line.
2. Select Save and press Enter. The Save Configuration To screen appears.
3. Select Current Configuration and press Enter. (Current Configuration is the
only option. The factory default configuration cannot be altered.)
Configuring the DSU
Configuration option settings determine how the DSU operates. Use the DSU’s
Configuration branch to display or change configuration option settings.
The DSU is shipped with factory settings in the Default Factory configuration
area. The defaults are shown in the configuration options tables.
8 7520-A2-GN10-10
December 1998
Accessing and Displaying Configuration Options
To display the configuration options, you must first copy one configuration option
set into the edit area.
Procedure
To load a configuration option set into the configuration edit area:
1. Follow this menu selection sequence:
Main Menu
→
Configuration (Load Configuration From)
2. Select Current Configuration or Default Factory Configuration. Press Enter.
The selected configuration option set is loaded and the Configuration
Edit/Display menu screen appears.
Configuration
Edit/Display
•
System
• Network
• Data Port
• Terminal Port
MAIN MENU
Status
Test
Configuration
Control
497-15239
Load
Configuration
From ...
System Options Menu
For System Options, refer to Table 1. To access the System Options screen,
follow this menu selection sequence:
Main Menu
→
Configuration (Load Configuration From)
→
Configuration Edit/Display
→
System
Table 1. System Options (1 of 2)
Operating Mode
Possible Settings: DDS,LADS
Default Setting: DDS
Determines the unit’s operating mode. The choice depends on the DSU’s application.
DDS – Standard DDS network operation.
LADS – The Local Area Data Set operating mode requires that the local and remote
units are connected directly to each other. This is a point-to-point application; also
known as LDM.
9
7520-A2-GN10-10 December 1998
Table 1. System Options (2 of 2)
DDS Line Rate (Kbps)
Possible Settings: 2.4, 4.8, 9.6, 19.2, 38.4, 56, 64CC
Default Setting: 9.6
Sets the line speed for the DDS line.
DDS Line Rate (Kbps) option appears when Operating Mode is set to DDS.
2.4 to 56 – 2.4 to 56 kbps line rate.
64CC – 64 kbps Clear Channel on a 72 kbps circuit.
LADS Timing
Possible Settings: Internal, External, Receive
Default Setting: Internal
Determines the timing source for the unit.
LADS Timing option appears when Operating Mode is set to LADS.
Internal – Timing derived from the unit’s local clock. Use this setting for the LADS
primary timing unit that establishes the timing for both point-to-point units.
External – Timing is derived from the external clock provided by the DTE connected to
the V.35 interface on circuit CT113 (pins U, W).
Receive – Timing is derived from the line receive signal unless the unit is running
diagnostic tests. During the tests, the timing source is the internal clock. This setting
should be used for a LADS secondary timing unit.
LADS Line Rate (Kbps)
Possible Settings: 2.4,4.8,9.6,19.2,38.4,56,64
Default Setting: 9.6
Sets the line operating rate for LADS operation.
LADS Line Rate (Kbps) option appears when Operating Mode is set to LADS.
2.4 to 64 – DSUs communicate at this line rate.
Test Timeout
Possible Settings: Enable,Disable
Default Setting: Disable
Allows user-initiated tests to end automatically.
Enable – User-initiated loopback and pattern tests end when test duration is reached.
Disable – Tests must be terminated manually from the Network Tests screen.
NOTE: Tests commanded by the DTE or network-initiated tests are not affected by
this test timeout.
Test Duration (min)
Possible Settings: 1–120
Default Setting: 10
Determines the number of minutes for a test to be active before automatically ending.
Test Duration (min) option appears when Test Timeout is enabled.
1 to 120 – Amount of time in minutes for a user-initiated test to run before terminating.
10 7520-A2-GN10-10
December 1998
Network Interface Options Menu
For Network Interface Options, refer to Table 2. To access the Network Interface
Options screen, follow this menu selection sequence:
Main Menu
→
Configuration (Load Configuration From)
→
Configuration Edit/Display
→
Network
Table 2. Network Interface Options
Network-initiated DSU Loopback (64K CC)
Possible Settings: Enable, Disable
Default Setting: Enable
Indicates whether the access unit responds to a DSU latching loopback sequence sent
by the network as specified by TR62310.
Network-initiated DSU Loopback (64K CC) option appears when Operating Mode
is set to DDS (see Table 1, System Options).
Enable – Responds to network-initiated commands to start and stop a latching DSU
loopback.
Disable – DSU will not respond to a DSU loopback initiated by the network.
Data Scrambling (64K CC)
Possible Settings: Enable, Disable
Default Setting: Disable
Determines whether data scrambling is used to suppress the possible simulation of
network-initiated DSU latching loopback commands by application data.
Data Scrambling (64K CC) option appears when Operating Mode is set to DDS
(see Table 1, System Options).
Enable – Enables data scrambling. The local and remote units must be set the same.
Disable – No data scrambling.
V.54 Initiated DSU Loopback
Possible Settings: Enable, Disable
Default Setting: Enable
When enabled, user data is looped back to the network when a V.54 Loop Up sequence
is received. The DSU loopback ends when a V.54 Loop Down sequence is detected.
Enable – DSU loopback can be initiated or terminated by a remote unit sending in-band
V.54 Loop 2 Up or Down sequences.
Disable – V.54 Loop 2 sequences are ignored.
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