Paradyne SLV User manual

TM
1
FrameSaverSLV
Network Access Module (NAM)
Installation Instructions
Document Number 9000-A2-GN1J-30
May 1999
Product Documentation on the World Wide Web
We provide complete product documentation online. This lets you search the
documentation for specific topics and print only what you need, reducing the waste of
surplus printing. It also helps us maintain competitive prices for our products.
Complete documentation for this product is available at www.paradyne.com.
Select
Library → Technical Manuals → FrameSaver Frame Relay Devices.
Select the following document:
9128-A2-GB20
FrameSaver SLV 9126/9128 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
Before You Begin
Make sure you have:
A small, flat-blade screwdriver.
A small, Phillips screwdriver if installing an ISDN PRI DBM.

FrameSaver SLV ISDN Dial Backup Module (DBM) Installation Instructions
(Document No. 9000-A2-GN19) if installing an ISDN PRI DBM.
If a FrameSaver NAM with DBM is being replaced, the DBM must be transferred to
the replacement NAM.
Configuration information for the FrameSaver unit being installed or replaced.

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Appropriate cables:
— DSX cable
— Data port cables
— COM port-to-terminal or COM port-to-PC cable
— Modem cable
See the User’s Guide for additional information on:

Troubleshooting
 Cables, Connectors, and Pin Assignments
 Technical Specifications
 Equipment List
Package Checklist
Verify that your package contains the following:
FrameSaver SLV NAM
NAM I/O card
T1 network cable
ISDN PRI cable, if applicable

FrameSaver SLV 9126/9128 Quick Reference (Document No. 9128-A2-GL10)
Visit the Paradyne World Wide Web site at www.paradyne.com to register your
warranty. Select
Service & Support → Warranty Registration.
Safety Instructions
Please refer to the EMI Warnings and Important Safety Instructions beginning on
page 24.
!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.

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SINGLE
T1 NAM
Network
ISDN PRI DBM
Modem
DSX-1
Communications
Port
Port 1
Port 2
NAM
I/O Card
3
Installing the I/O Card
The NAM’s I/O card provides the network, DSX, DBM,
modem, DTE and COM port connections. The I/O card
inserts directly behind the NAM that it supports in the
access carrier.
1. Remove the I/O card from the shipping box.
To avoid damaging the card, handle by the top and
bottom edges only.
2. At the rear of the carrier, align the I/O card with the
upper and lower tracks of the slot.
Push gently toward the midplane until it stops and
the card cannot be pushed any further.
99-16203-02
RearView
Captive
Screws
3. Using a small, Phillips screwdriver, alternately tighten the
captive screws until they are all snug.

98-16209
Ejector
Latches
FrontView
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Installing the NAM into a Multislot Housing
The illustration shows the 14-slot access carrier as the housing.
CAUTION:
Be sure that you install the NAM in the correct slot so that it mates with its
matching I/O card. Otherwise, you could damage your card.
1. Remove the NAM from the shipping
box. Handle only by the top and
bottom edges to avoid damaging
the card.
2. At the front of the carrier, align the
NAM with the upper and lower
tracks of the appropriate slot.
3. Slide the NAM into the tracks until it
seats with the midplane connectors.
Use care not to force the card or
bend any pins.
4. Close the carrier’s upper and lower
ejector latches to lock the card into
place, then tighten the captive
screws on the ejector latches.
Verification Check:
Did the OK LED light?
– If yes, the FrameSaver unit has power.
– If no, refer to
Troubleshooting in the User’s Guide.

5
Connecting the COM Port to an Asynchronous Terminal
The FrameSaver unit must first be directly connected to a VT100-compatible
asynchronous terminal or a PC providing VT100 terminal emulation to set up access
and management of the unit.
1. Configure the VT100-compatible async terminal or PC to be compatible with the
FrameSaver unit:
– COM Port in use by your PC: COM1 or COM2
– COM Port Baud Rate is set to 19.2 kbps
– Character length is set to 8 data bits
– Parity is set to none
– Stop bit is set to 1
– Flow Control is set to None
2. Insert the 8-pin end of the cable into the COM port for the appropriate slot.
3. Insert the other end of the cable into the VT100-compatible asynchronous terminal,
PC, or async terminal providing VT100 terminal emulation to set up the unit.
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COM Port-to-Terminal/Printer
or
COM Port-to-PC Cable
4. Press Enter on the keyboard to display the Main Menu.
Verification Check:
Did the Main Menu appear on the async terminal?
– If yes, continue with the installation.
– If no, recheck terminal and FrameSaver unit compatibility (see settings in
Step 1), or press the Enter key.
Refer to Troubleshooting in the User’s Guide for additional information.

6
A Quick Guide to Configuration
The FrameSaver unit should operate using the default (factory-set) configuration
options, except for the changes specified in these installation instructions. Refer to the
following table for help to navigate through the menus.
Press the . . . To . . .
Esc key Go back one screen or menu level. To see a visual
representation of the menu levels, see Menu Hierarchy in
the Quick Reference.
Tab key, or
up (↑) and down (↓)
arrow keys
Move the cursor from one menu item to the next.
Enter or Return key Complete the menu or option selection.
Spacebar Display the next available setting when changing a
configuration option. All the available settings for an
option appears at the bottom of the screen.
As an example, follow these steps to go to the Configuration Edit/Display menu so you
can start setting up the unit. To load a configuration for editing:
1. From the Main Menu, press the down arrow key twice so the cursor is on
Configuration.
2. Press Enter to display the Configuration menu. The Load Configuration From
menu appears.
3. Press Enter to select Current Configuration. The cursor is already on this selection.
The Configuration Edit/Display menu appears.
This sequence of steps would be shown as the menu selection sequence:
Main Menu → Configuration → Load Configuration From: → Current Configuration
To save a configuration option change:
1. Press Ctrl-a to switch to the screen function keys area at the bottom of the screen.
2. Type sor S(Save) and press Enter. The Save Configuration To menu appears.
3. Press Enter again to save your changes to the Current Configuration.
4. Press Esc until the Configuration Edit/Display menu reappears to continue
configuring the unit.
Press Ctrl-a, type m(MainMenu), and press Enter to return to the Main Menu.
In the sections that follow, only the minimum option changes required are included so
you will have a quick and trouble-free installation.
See the configuration option tables in the User’s Guide for more information about
configuration options.

7
Installing and Setting Up the FrameSaver SLV
To complete the installation, you must:
Verify that self-test passed.
Configure the FrameSaver unit.
Connect to the network and continue configuration.
Connect to the modem.
Connect to the ISDN, if applicable.
Connect to the DSX, if applicable.
Connect to the DTE(s).
Check the connections.
NOTE:
Follow these instructions as they are presented. The system should be configured
first before connecting the cables. Otherwise, installation time will be increased.
Verifying that Self-Test Passed
Before starting to configure the FrameSaver unit, confirm that the unit passed the
self-test.
1. Follow this menu selection sequence from the Main Menu, pressing Enter after
each selection:
Main Menu → Status → System and Test Status
2. Check the Self-Test Results column (in the center of the System and Test Status
screen).
– If Passed appears, the FrameSaver unit successfully completed the self-test.
– If any failure messages appear, reset the unit by removing and reinserting the
NAM. The unit will perform the self-test again. If the failure reappears, call your
service representative for assistance.

8
Configuring the FrameSaver Unit
To configure the FrameSaver unit:
Set the system clock.
Assign the Node IP Address.
Set up Network physical interface, and DSX-1 physical interface, if applicable.
Enter time slot assignments, if applicable.
Set up Data Port physical interface(s).
Set up modem call directories if dial-out traps are desired.
Set up management.
Set up Automatic Frame Relay Discovery Configuration.
Set up Automatic Backup Configuration, if an ISDN DBM if installed.
Setting the System Clock
To set up the system clock:
1. Select Date & Time.
Main Menu → Control → Date & Time
2. Move the cursor to the first field and enter the:
– Date in mm/dd/yyyy format (month/day/year).
– Time in hh:mm format (hours:minutes).
3. Save the date and time.
Assigning the Node IP Address
1. Set up the node.
Main Menu → Configuration → Management and Communication → IP Node
2. Minimally, enter the following options:
– Node IP Address
– Node Subnet Mask
3. Save the configuration.

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Setting Up the Network and DSX-1 Interfaces
1. Select the network interface’s physical configuration options.
Configuration → Network → Physical
2. Configure the interface to match the network provider’s settings.
3. Save the configuration and return to the Network menu.
4. Select Frame Relay.
5. Configure the frame relay characteristics to match the network provider’s settings.
6. Save the configuration and return to the Configuration Edit/Display menu.
7. If applicable, select DSX-1.
8. Enable the interface and configure the unit to match the service provider’s settings.
9. Save the configuration.
Entering Time Slot Assignments
Frame relay time slots are discovered automatically if Time Slot Discovery is enabled
on the Frame Relay Network 1 Assignments screen, which is the default setting).
Configuration → Time Slot Assignment → Frame Relay Network Assignments
This feature can be disabled, if desired, so that Frame Relay-to-Network Time Slot
Assignments can be manually configured.
Use the following procedure if additional network time slots need to be cross-connected
to the DSX-1 interface. See
Assigning Time Slots in Configuration Options of the User’s
Guide to read more about assigning time slots for a FrameSaver 9124, 9126, or 9128.
1. For the DSX-1 interface, select DSX-1 from the Configuration Edit/Display menu
and enable Interface Status.
2. Return to the Configuration Edit/Display menu.
3. Select Time Slot Assignment, then Frame Relay Network Assignments.
4. For the DSX-1 interface, map the desired time slots to the DSX-1 interface.
– Press the Tab key to move the cursor to the desired network interface time slot.
– Press the spacebar until the appropriate DSX-1 channel is displayed, Frame
Relay (FrameRly1) or Available. Frame Relay is the default.
– Repeat the process until all the desired time slots have been assigned to a
DSX-1 channel.
5. Save the configuration and return to the Configuration Edit/Display menu if no
DSX-1 channels will be assigned to network time slots.
If configuring DSX-to-network time slots, proceed to Step 6.
6. Return to the Time Slot Assignment menu and select DSX-1 to Network
Assignments.

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7. Map the DSX-1 time slots to the network time slots.
8. Save the configuration.
Setting Up Data Ports
1. Configure the physical characteristics of the port.
Configuration → Data Ports → Physical
2. For multiport FrameSaver units, select a port.
Helpful Hint:
Press the spacebar to display the port number and press Enter.
3. If Port-2 will be used on a multiport unit, enable Port Status.
4. Change any options that may be necessary for the port.
5. Save any changes and return to the Data Ports menu.
6. Select Frame Relay.
7. Configure the port to match the DTE’s settings, if necessary.
8. Save the configuration.
Setting Up the Modem
FrameSaver 9126 and 9128 units have an integral modem for remote management.
It is already set up for dial-in access to the unit, with Port Use set to Terminal.
If using the modem for dialed IP network connectivity (SNMP, Telnet, FTP, or trap
dial-out):
1. Select Modem Port.
Configuration → Management and Communication → Modem Port
2. Minimally, change Port Use to Net Link, Save the change, and return to the
Management and Communication menu.
– Change Port Use to Net Link.
– Assign the IP Address and Subnet Mask if it is different from the Node.
– Change Link Protocol to SLIP, if necessary. The default setting is PPP.
3. Save the configuration.
See Setting Up the Internal Modem in Setup of the User’s Guide for additional
information.

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If trap dial-out is desired:
1. Set up the modem call directory phone numbers.
Main Menu → Control → Modem Call Directories
2. Select the desired Directory Number (A for Alarm, or 1–5 for an alternate trap
destination if the A does not answer).
3. Enter the phone number(s). Use valid characters only:
– ASCII text
– B for blind dialing
– W for wait for dial tone
– P for pulse dialing unless B specified
– T for tone dialing unless B specified
– Space, underscore ( _ ), comma (,) for a 2-second pause, and dash (–)
readability characters
4. Save the phone number(s).
5. Select SNMP Traps.
Configuration → Management and Communication → SNMP Traps
– Enable SNMP Traps.
– Assign SNMP Trap Managers.
– Specify the IP address of the NMS that traps will be sent to when dialing out.
– Select desired trap categories.
6. Save the configuration and return to the Management and Communication menu.
7. Select Dial-Out and minimally, enable Trap Dial-Out.
8. Save the configuration.

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Setting Up Management
For remote sites, only SNMP management needs to be set up. For the central site,
local management between the unit and the router must be set up along with SNMP
management.
To set up SNMP management:
1. Select Management and Communication.
2. Select General SNMP Management.
3. Minimally, set Name 1 Access to Read/Write.
4. Save the configuration.
To set up local management at the central site unit:
1. Create a DLCI for the data port.
Configuration → Data Ports → DLCI Records
2. Save the configuration and return to the Configuration Edit/Display menu.
3. Select Management PVC.
Configuration → Management and Communication → Management PVC
4. Make the DLCI Record a management DLCI to create a Management PVC.
Minimally, enter the following options for each of the DLCI Records created:
– Name for the management DLCI.
– Special and the IP Address for the interface if it is different from the Node
IPAddress.
– Primary Link for this DLCI (i.e., the DLCI’s primary destination interface).
– Primary DLCI (i.e., the DLCI number at the other end of the PVC).
5. Save the configuration.

13
Setting Up Automatic Frame Relay Discovery Configuration
The default frame relay discovery mode is 1MPort. No auto-configuration occurs until
the network cable is connected. If you do not want management links configured or
auto-configuration, change the default setting for the FR Discovery feature.
The following table describes the difference between the various settings.
FR Discovery Mode Description
1MPort
(Default)
Auto-configuration is enabled, and for each DLCI
discovered on the network, a multiplexed network DLCI
and a standard port DLCI will be configured and
connected.
The multiplexed network DLCI will contain one EDLCI for
management traffic (EDLCI/2), and one EDLCI for
customer data (EDLCI/0). The customer data EDLCI on
the network will be cross-connected to the data port
DLCI.
1Port Auto-configuration is enabled. For each DLCI discovered
on the network, a multiplexed network DLCI and a
standard port DLCI will be configured and connected
(EDLCI/0), creating a PVC within the FrameSaver unit.
No management DLCIs will be configured on the network
interface.
2MPorts Auto-configuration is enabled on both Port-1 and
Port-2.
A management PVC is configured on EDLCI/2.
A multiplexed network DLCI containing three EDLCIs
is configured for Port-1 customer data (EDLCI/0),
Port-2 customer data (EDLCI/1), and management
data (EDLCI/2).
PVC connections are configured between the network
and port DLCIs.
NetOnly Auto-configuration is enabled, DLCIs are discovered on
the network interface, but no cross-connections are
configured.
Disable No frame relay discovery takes place. No DLCIs will be
configured on the network interface. The user must
manually configure DLCIs and PVC connections.
See Using Auto-Configuration in Typical Applications and Setting Up Automatic
Configuration
in Setup of the User’s Guide for more information.

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To change the default setting for Frame Relay (FR) Discovery:
1. Select Auto-Configuration.
Main Menu → Auto-Configuration
2. Select another frame relay discovery mode.
3. Save the change. The Delete All DLCIs and PVC Connections? prompt
will appear.
4. Make your selection, Yes or No.
5. Return to the Main Menu.
NOTE:
If auto-configuration creates a multiplexed DLCI, but a standard DLCI is
needed, change the DLCI to standard from the network DLCI Records screen:
Configuration → Network → DLCI Records
Setting Up Automatic Backup Configuration
The Automatic Backup Configuration feature is used to automatically create alternate
DLCI records and PVC connections on the ISDN DBM (backup) interface when there is
a failure of the primary link or DLCI, or LMI is Inactive. This feature should be disabled
for the central site unit, but enabled for the remote unit.
Automatic backup can be changed at any time via the Auto Backup Criteria
configuration options. Specific days and times that backup will be allowed can also be
specified. The following table describes what happens when Auto Backup is enabled or
disabled.
Auto Backup Description
Enable Auto-configuration of backup is enabled and traffic is
rerouted to the backup (alternate) interface when a failure
occurs.
The FrameSaver unit automatically enables the Alternate
Link configuration option and creates an Alternate DLCI
and EDLCI, and traffic is rerouted over the backup
interface.
Disable
(Default)
Auto-configuration of backup is disabled and traffic is not
rerouted to the backup interface.
See Changing the Automatic Backup Configuration in Setup and Configuring Auto
Backup Criteria
in Configuration Options of the User’s Guide for more information.

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M66 Block
NAMs
RJ48C
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Plug Number
Label
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Connecting to the Network
1. Insert the 8-pin connector on the
RJ48C network cable into the NET
interface.
2. Insert the other end of the cable into
the RJ48C modular jack.
Connecting to an M66 Block
Use the optional T1 mass termination cable to connect up to seven NAMs to an M66
block. The T1 mass termination cable is a 5-foot RJ48H cable consisting of a 50-pin
plug-to-seven RJ48C plugs.
1. Insert RJ48C plugs on
the RJ48H network
cable into up to seven
FrameSaver unit NET
interface(s).
2. Insert the 50-pin plug
end of the cable into
the M66 block.

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Verification Check:
Check the Network LEDs. Is the Sig (signal) LED on, and are the OOF (out of
frame), and ALM (alarm) LEDs off?
– If yes, the network interface is set up correctly and is ready to pass data.
– If no, check that both ends of the network cable are properly seated, then verify
that the network physical options are configured correctly.
Main Menu → Configuration → Network → Physical
Check Health and Status messages in the left column of the System and Test
Status screen to see the LMI status, to verify that LMI is up.
Main Menu → Status → System and Test Status
– If LMI Down, Network appears for more than three minutes, or any other
network-related status message appears, refer to the status information in
Displaying System Information of the User’s Guide for possible reasons for the
messages and what can be done to resolve the problem.
Setting Up the ISDN DBM
FrameSaver 9126 and 9128 units may be equipped with an ISDN DBM.
An ISDN BRI DBM may be installed in a FrameSaver 9126, supporting up to
2 B-channels.
An ISDN PRI DBM may be installed in a FrameSaver 9128, supporting up to
23 B-channels.
The following guidelines apply.
Central site configuration guidelines:
– Configure a Link Profile for each remote site.
– Configure the unit to answer calls from the remote sites.
– Leave Automatic Backup Configuration disabled.
– Manually create alternate DLCIs on the ISDN Backup Link.
– Manually specify ISDN DLCIs as alternate DLCIs for the PVC Connection after
the primary DLCIs have been automatically discovered from the primary network
Link LMI or manually configured.
Remote site configuration guidelines:
– Configure a Link Profile for the central site in the first link profile, called HQ_Site.
This ensures that a backup DLCI will be created automatically on the backup
link for each DLCI discovered on the network interface using the central site’s
link profile.
– Configure the unit to originate calls to the central site if it is a FrameSaver 9128.
A FrameSaver 9126 is already configured to originate calls.
– Enable the Automatic Backup Configuration feature if the unit is a
FrameSaver 9128. A FrameSaver 9126 already has this feature enabled.

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To set up the DBM for dial backup:
1. Configure the DBM interface.
Main Menu → Configuration → ISDN → Physical
2. Minimally, set the following configuration options:
– Interface Status is set to Enable.
– Originate or Answer is set to Answer for a central site, and set to Originate for a
remote site.
– Local Phone Number 1 is entered, plus the following:
FrameSaver 9126 with BRI FrameSaver 9128 with PRI
Configure the B-channels:
Service Profile ID1 (SPID)
Local Phone Number 1
Service Profile ID2 (SPID)
Local Phone Number 2
Configure T1 physical characteristics
to match the service provider’s
settings.
Local Phone Number
3. Save the configuration and return to the ISDN menu.
4. Select Link Profiles, then type n(New) and press Enter.
5. Set up the ISDN Link Profiles.
– Name for the destination entered (e.g., Tampa). The default setting is HQ_Site.
– Link Status is set to Auto.
– Phone numbers entered:
Originating FrameSaver Unit Answering FrameSaver Unit
Outbound phone number.
Valid characters can include:
Numbers (0–9)
Special characters * and #
Spaces
Inbound Calling ID1 and ID2. These
are the phone numbers of units that
calls will be accepted from.
Valid characters can include:
Numbers (0–9)
NOTE:
Remember to include local dial-out numbers (i.e., 9, then the number).
6. If configuring a central site unit, proceed to Step 7.
If configuring a remote site unit, proceed to Step 11.
7. Save the configuration and return to the ISDN menu.
8. Select DLCI Records, New, and press Enter. Minimally, configure the following
options to create DLCI records for the link:
– DLCI number
– DLCI Type is set to Multiplexed if a multiplexed DLCI is being backed up.
9. Save the configuration.

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10. Select PVC Connections, then New. Minimally, configure the following options to
create a PVC connection to be backed up.
– Alternate Destination Link name entered (e.g., Tampa). See the ISDN Link
Profile Name.
– Alternate Destination DLCI.
– Alternate Destination EDLCI if a multiplexed DLCI.
11. Save the configuration and return to the Configuration Edit/Display menu.
12. Select Auto Backup Criteria.
13. Enable Auto Backup.
14. Specify When Auto Backup Allowed – Always or Restrict. If Restrict is selected,
specify the days and hours of the week during which automatic backup can take
place.
15. Save the change.
See Setting Up An ISDN DBM for Dial Backup in Setup of the User’s Guide for
additional information.
Entering Trap Managers
Once the FrameSaver unit is connected to the network, SNMP Trap Managers can be
configured.
To enter SNMP managers:
1. Select SNMP Traps configuration options.
Main Menu → Configuration → Management and Communication →
SNMP Traps
2. Minimally, enter at least one trap manager – the central site’s NMS trap manager:
– SNMP Traps is set to Enable
– Number of Trap Managers
– NMS
n IP Address ( n being the first, second, third, etc., trap manager entered)
– Destination (of the management PVC that will be used to reach the trap
manager)
3. Save the configuration.
Setting Up Service Provider Connectivity
If management needs to be set up between a service provider’s customer and its
network operations center (NOC), a non-multiplexed DLCI must be configured to carry
management data between the customer’s central site and the NOC console. This
requires that a frame relay discovered DLCI needs to be modified. This is because all
auto-configured network DLCIs are configured as multiplexed DLCIs.

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To set up NOC management:
1. Select DLCI Records on the network interface:
Configuration → Network → DLCI Records
2. Select Modify. The Modify DLCI Record for DLCI Number? prompt
appears.
3. Select the DLCI that will be used by pressing the spacebar until the correct DLCI
number appears, then select it.
4. Change the DLCI Type from Multiplexed to Standard.
The DLCI in connections. Update DLCI usage as follows:
prompt appears.
5. Select the Delete EDLCI Connections and Make a Mgmt Only PVC
option.
6. Select Yes at the prompt.
PVC connections for the selected DLCI are broken, the Port-1 DLCI mapped to
this network DLCI and the embedded management DLCI (EDLCI) are deleted, and
the selected DLCI will be reconfigured as a management PVC using the Node IP
Address.
Verifying the End-to-End Path
After installation of a remote site unit, run an IP Ping test to ping the NMS at the central
site and verify that the entire path from the remote unit to the NMS is functioning. To run
the IP Ping test, NMS trap managers must have been configured for the remote unit.
One of those trap managers must be the central site NMS.
1. Select the IP Ping test.
Main Menu → Test → IP Ping
2. Enter the IP Address of the device being pinged, then select Start.
NOTE:
When running tests, the cursor is positioned over the Start command. Press
Enter to start the test. Stop is displayed while the test is running. Press Enter
again to issue the Stop command.
– While the test is running, In Progress . . . is displayed in the Status field.
– When the test is finished, Alive. Latency =
nn ms should appear as the
Status (
nn being the amount of time the test took in milliseconds).
If any other message is displayed, additional testing will be required. See
Device
Messages
in Displaying System Information of the User’s Guide for information
about IP Ping-related messages.

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MDM
Port 1
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Port 2
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Connecting to the Modem
1. Insert the 6-pin connector on the
modem cable into the DBM
interface.
2. Insert the other end of the cable
into the modem service RJ11C
jack.
Connecting to the ISDN
1. Insert the 8-pin connector on the
ISDN cable into the MDM interface.
2. Insert the other end of the cable into
the ISDN service RJ48C jack.
Connecting to the DSX
1. Insert the DB15 end of the DSX
cable into the DSX interface.
2. Insert the other end of the cable
into the CPE (Customer Premises
Equipment, such as a PBX).
Connecting to a DTE
1. Connect one end of the
V.35 cable to Port1 or Port 2.
2. Connect the other end of
the V.35 cable to the DTE.