Paradyne COMSPHERE 3550 Series User manual

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Model 3550 2-Port TDM/Flex Upgrade
Feature Number 3550-F1-202
Installation Instructions
Document Number 3550-A2-GZ50-10
December 1996
Overview
The 2-port time division multiplexer (TDM/Flex) upgrade for the Model 3550 (standalone) DSU includes a
circuit card that rests in an expanded base with an expanded rear panel. With this upgrade installed, each port
(Port 1 or Port 2) can be configured independently to operate as an EIA-232 or V.35 interface via the diagnostic
control panel (DCP) or 6700 Series network management system (NMS).
The 2-port TDM/Flex upgrade consists of the following items:
•One circuit card with expanded rear panel resting in an expanded base, and the pre-folded flat cable
•Two thread-cutting screws
•One screw with a captive-lock washer
If any item is missing, contact your service representative.
If connecting a port to data communications equipment (DCE), a crossover cable is required (feature number
3211-178F for a V.35 Crossover Cable or feature number 4951-035F for an EIA-232 Crossover Cable). If using
V.35 operation, a V.35 Interconnect Cable (feature number 3000-F1-510) is required for Port 2; the V.35
connector on the DSU is used for Port 1.
Before You Start
Refer to Chapters 4 and 5, Operating the DSU and Configuring the Unit, of the user’s guide if needed.
Procedure
1. Make a copy of the Configuration Worksheet with Full Mode enabled (Appendix B of the user’s guide).
2. Access Stat (Status branch), then ID (Identity subbranch).
3. Record the unit’s serial number at the top of Page 1 of the Configuration Worksheet.
4. Access Confg (Configuration branch).
5. Verify that Full Mode (Menu subbranch) is enabled.
6. Record the configuration option settings for each option set (DSU, Diag, etc.) on the Configuration
Worksheet.
7. Record all Backup Directory entries on the worksheet if a DBM is installed.
8. Record the unit’s local telephone number (Phone) if a DBM is installed.
TM

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Getting Started
Refer to Figure 1 as you follow these steps.
Procedure
1. Unplug the table-top ac transformer from the ac outlet, then disconnect the power cord from the DSU’s rear
panel (labeled POWER).
2. Disconnect the DDS interface cable (labeled LINE) from the DSU.
3. Disconnect the DBM and NMS interface cables (labeled BACKUP and CC/DC, respectively), if installed.
4. Disconnect the EIA-232-D/V.24 or V.35 interface cable from the DSU.
If a TDM/Flex is being replaced, disconnect the Port 2 interface cable, as well.
Figure 1. Disconnecting the DSU

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Opening the Unit
HANDLING PRECAUTIONS
FOR
STATIC SENSITIVE DEVICES
This product is designed to protect sensitive components from damage due to
electrostatic discharge (ESD) during normal operation. When performing installation
procedures, however, take proper static control precautions to prevent damage to
equipment. If you are not sure of the proper static control precautions, contact your
nearest sales or service representative.
Refer to Figure 2 as you follow these steps.
Procedure
1. Turn the unit upside down.
If a TDM/Flex is being replaced, the unit does not have to be turned over in order to open the case.
2. Using a small flat-head screwdriver, release the four snap tabs holding the base in place.
3. Carefully separate the cover from the base, and return the unit to an upright position.
4. Fold the DSU’s cover over (from the rear of the DSU toward the front).
Be careful not to pull the LCD and keypad flat cables from their connectors.
496-14518-01
COMSPHERE 3610
SNAP TAB SERIAL
NUMBER
P a
r
a dyn e
R
UL
R
THISDIGITAL APPARATUSDOES NOT EXCEED THE CLASS A LIMITS FOR RADIO NOISE
EMISSIONSFROM DIGITAL APPARATUSSET OUT IN THE RADIO INTERFERENCE
REGUAALTIONSOF THE CANADIAN DEPARTMENT OF COMMUNICATIONS
FOR USE WITHA CERTIFIED CLASS 2 POWER SUPPLY FOUR UTILISER AVECLINE
ALIMENTATIONCERTIFEE
EN CLASSE 2.
THISDEVICE COM;OIES WITH PART 15 OF THE FCC RULES OPERATION IS SUBJECT TO
THEFOLLOWING TWO CONDITIONS (1) THIS DEVICE MAY NOT CAUSE HARMFUL
INTERFERENCEAND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED
INCLUDINGINTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.
FCC ID: NOTAPPLICABLE
PEC MFGDATE
MODEL
NO. SER.NO
COMMCODE
MADE IN USA
SNAP TAB
WITH TDM/FLEX
SNAP TABS
SNAP TABS
COMSPHERE 3550
Figure 2. Opening the DSU

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Removing the DSU from Its Base
Refer to Figure 3 as you follow these steps. If replacing a TDM/Flex, refer to this figure as you de-install the
current TDM/Flex
Procedure
1. Disconnect the keypad flat cable from the DSU. Squeeze the small black latches on each side of the cable
and gently pull up, carefully lifting the cable up and out of the connection.
2. Disconnect the LCD flat cable from the DSU circuit card. Carefully and gently work the cable (not the
connector)out from the connector. Be careful not to bend any of the cable pins.
3. If a TDM/Flex is being replaced, disconnect the TDM/Flex flat cable’s pre-folded 40-position header from
the DSU, and fold the TDM/Flex flat cable out over the side of the expanded base.
4. If a TDM/Flex is being replaced, remove the two #4 thread-cutting screws at the front corners, and the
#4 screw with captive-lock washer at the rear corner of the DSU.
5. Remove the DSU from the existing base. Carefully lift the DSU up until its connectors are free of the rear
panel. Set the DSU on a clean ESD (anti-static) workpad.
6. Write the serial number from the existing base onto the new TDM/Flex expanded base using indelible ink
(see Figure 2). Discard the existing base and rear panel.
Installing the TDM/Flex
The TDM/Flex is shipped so that it rests in the expanded base; the DSU is installed onto the expanded base. Refer
to Figure 3 as you install the DSU onto the new expanded base.
Procedure
1. Fold the TDM/Flex flat cable out over the side of the new expanded base.
2. Position the DSU over the new expanded base.
3. Secure the DSU to the expanded base using the two #4 thread-cutting screws at the front corners, and the
#4 screw with captive-lock washer at the rear corner (make sure this screw is tightened).
4. Connect the TDM/Flex flat cable’s pre-folded 40-position header to the DSU, as shown. Make sure the pins
are correctly aligned with the connector (one pin hole on the connector is blocked).
5. Reconnect the keypad flat cable by inserting the cable into its connector as far as it will go, then pushing
down on the tiny latching mechanism.
6. Being careful not to bend the pins, align the LCD flat cable to its connector, then gently push the cable pins
back into place.

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Figure 3. Installing the TDM/Flex

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Reassembling the Unit
Refer to Figure 3 as you close the unit and to Figure 1 to reconnect cables.
Procedure
1. Align the cover over the expanded base and rear panel. Make sure the four snap tabs are over their
corresponding slots (two in front and two in back).
2. Apply pressure at the four snap tab connecting points, pressing together until all four tabs snap securely
into their slots.
3. Reconnect the power cord to the DSU (labeled POWER), referring back to Figure 1.
4. Plug the table-top ac transformer into the ac outlet.
On power-up, the DSU determines what options (DBM, MUX – TDM/Flex) are installed.
A Device Test is automatically initiated on the DSU and each option installed. During the tests, all
indicators on the diagnostic control panel (DCP) light briefly, and the LCD displays the message
Power-up Tests.
When the Device Tests are complete, the LCD momentarily displays messages indicating that each device
(DSU and MUX, or DBM if installed) has passed the power-up test. This test takes approximately
20 seconds to complete.
Note that the red Alarm LED lights, indicating that there is no DDS signal.
5. Perform a DSU Device Test from the DCP to ensure that the unit is functioning properly.
Press the key to return to the top-level menu, then select Local Test DSU Devic.
6. If the keypad and/or LCD functions fail, check that the Keypad and LCD flat cables are installed properly.
Perform the Device Test again.
If the Device Test fails again, call your service representative for assistance. Otherwise, continue with this
procedure.

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Reconfiguring the Unit
First load a factory-set configuration. Configure each port for either EIA-232 or V.35 operation, then customize
the configuration loaded based upon the completed Configuration Worksheet and site requirements.
Procedure
1. Load the appropriate factory-loaded configuration: PTPC (point-to-point control), MPTC (multipoint
control), PTPT (point-to-point tributary), or MPTT (multipoint tributary).
Select the key !Local !the key (if a DBM is installed) !Confg ! Opts ! Load from !
(e.g.) PTPC ! Save to !Activ.
2. Make any desired configuration changes in the DSU, Diag, DBM, ExtBU, Gen, Bkup, MUX, and PrtSp
option sets.
For information on these option sets, refer to the user’s guide.
To verify that the TDM/Flex is enabled:
1. Press the key until the Edit/Save menu appears, then select MUX.
2. Select Setup (F2).
3. If MUX Funct is not set to Enab, select Enab. (The selected setting appears on the first line of the display.)
4. Press the key to return to the MUX submenu.
To configure each port for EIA-232 or V.35 operation:
1. Select Prt1 (F3).
DTE Port appears, with the configuration option’s current setting displayed on the first line.
2. Select V.35 (F3), if needed.
The setting changes from EIA-232 to V.35.
3. Press the key until you return to the Edit/Save menu.
To complete the unit’s configuration:
1. Based upon the DSU’s configuration prior to the installation as recorded on the Configuration Worksheets,
make changes to the unit’s configuration options.
Refer to the Configuration Option Tables in Chapter 5 of the user’s guide to determine whether the DSU’s
previous settings are still appropriate.
2. Press the key to return to the Edit/Save menu when finished customizing the unit’s configuration.
3. Press the F1 key below SAVE.

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4. Select area (Activ, Remt, Usr1) on the Save to screen.
•If Activ is selected, your changes take effect immediately.
•If Usr1 is selected, your changes are stored for future use.
•If the unit is a control and Remt is selected, the complete configuration (all option sets available to the
unit and their configuration option settings) is sent to the tributary and saved to its Activ area.
Remember that you cannot save to the factory-loaded configurations. Command Complete appears when
the configuration has been saved.
5. Reconnect the DDS interface cable to the DSU (labeled LINE).
6. Reconnect the NMS (labeled CC/DC) and DBM (labeled BACKUP) interface cables to the DSU’s rear
panel, if installed.
7. Perform a Digital Test on each port.
Select the key !Local !Test !DSU !the key ! DT !Start !(e.g.) Prt1 !enter Address
!RunTim (hh:mm:ss).
Command Complete appears at the conclusion of the test.
8. Press the key, then select Displ to see the results of the Test.
9. Press the key to scroll the results.
Refer to the Digital Test section in Chapter 4 of the user’s guide for the results you should expect.
Refer to Chapter 2 of the user’s guide to verify network and DBM operation.
10. Reconnect the EIA-232-D/V.24 or V.35 interface cable to the DSU. Connect the Port 2 interface cable to
the DSU, then to the DTE.
If the TDM/Flex port is to be connected to a DCE, attach a 15-foot crossover cable (feature number
4951-035F) to the port, and connect it to the appropriate DCE.
If configuring Port 2 for V.35 operation, attach the V.35 Interconnect Cable (feature number 3000-F1-510)
to the port, then to the DTE.