Paradyne Hotwire 7974 User manual

1
Hotwire7974, 7975, 7976, 7984, 7985, and 7986
Standalone Termination Unit
Installation Instructions
Document Number 7970-A2-GN10-00
August 1999
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7970-A2-GB20
Hotwire 7974, 7975, 7976, 7984, 7985, and 7986 Standalone Termination Unit
User’s Guide
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Installation Overview
Installation and configuration of the Hotwire79xx Standalone Termination Unit
consists of:
Connecting power to the unit.
Connecting to the network.
Connecting to a DTE.
Connecting a system terminal.
Providing initial unit identity information or changing existing identity information.
Configuring your unit using the Configuration Edit menus.
Before you install the Hotwire 79xx Standalone Termination Unit, read the
Important
Safety Instructions
on page 33.
See the User’s Guide for additional information about:
Configuration options
Messages and troubleshooting
Technical specifications
Cables, connectors, and pin assignments
Connecting Power to the Unit
If your package includes a power pack: Plug the power pack into an ac outlet having
a nominal voltage rating between 100–240 Vac. Connect the output cable of the power
pack to the connector marked POWER on the rear panel.
If your package includes a direct-connection +24 Vdc power cable:
Connect the
unit to an external +24 Vdc SELV (Safety Extra Low Voltage) power source as
described in
Connecting the Unit to an Optional External +24 Vdc Power Source .
If you will use a –48 Vdc power supply: Connect the unit to an external –48 Vdc
SELV power source as described in the documentation shipped with the power supply
and power cable.

3
Connecting the Unit to an Optional External +24 Vdc Power Source
Using the dc power cable, the Hotwire 79xx Standalone Termination Unit is capable of
operating on a +24 Vdc SELV power supply.
Procedure
To use the dc power cable:
1. Connect the green wire to a suitable ground.
2. Connect the orange wire to the +24 Vdc source.
3. Connect the white wire to the return.
4. Cut the black, red, and blue wires off at the outer insulation.
5. Plug the power connector into the 79xx Standalone Termination Unit.
1
2
3
4
5
6
X
X
Ground
RTN
+24 Vdc
X
Black
Red
Green
White
Orange
Blue
99-14158-02
+24 Vdc Power Supply Pinouts

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Connecting to the Network
Procedure
To connect your unit to the network:
1. Connect one end of the supplied network cable into the rear panel DSL jack.
2. Connect the other end to your DSL network interface.
NOTE:
Do not use a flat VF network cable as this may severely degrade the
performance of the termination unit. Use only Cat 5 twisted-pair network cable.
Connecting to a DTE
Model DTE Connection
7974,
7984 The DSX-1 interface is an RJ48C, 8-position, unkeyed modular connector. An RJ48C-to-DB15 T1 network interface adapter cable is available from
Paradyne.
7975,
7985 The synchronous interface is a 25-pin EIA-530-A interface. Depending on the cable used, the interface can be adapted to an X.21, RS-449, or V.35
interface.
7976,
7986 The G.703 interface is either two BNC connectors (Transmit and Receive) for a 75-ohm unbalanced interface or an RJ48C, 8-position, unkeyed
modular connector for a 120-ohm balanced interface.
See Cables and Pin Assignments in the User’s Guide for specifications of the
connectors and cables.
Ferrite Choke (Model 7975 Only)
Procedure
To install the ferrite choke onto the DTE cable:
1. Open the ferrite choke and place it around the cable as close to the cable
connector as possible.
2. Close the two halves around the cable and snap the choke shut, pressing down on
the plastic latch to secure it in place.
3. Add a tie wrap (not included) as shown to prevent the ferrite choke from slipping
down the cable.
All ferrite chokes that are supplied must be installed following these instructions to
ensure compliance with FCC Part 15, VCCI, and CISPR22 rules.

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Hotwire 79xx Standalone Termination Unit LEDs
The following table contains a description of the LEDs on the Hotwire 79xx Standalone
Termination Unit front panel.
Label Color LED is . . .* Indicating . . .
POWER Green On
Off
Slow Cycling
Pulsing
Unit failure.
No power to the unit.
Unit is in minimum mode and a download is
required.
Normal Operation.
ALARM Red On
Off
Device failure, or self-test has failed.
Self-test passed.
TEST Yellow On
Off
Slow Cycling
Loopback test or 511 test pattern in progress.
No tests in progress.
Self-test in progress.
DSL Green On
Off
Slow Cycling
Fast Cycling
DSL link is up.
The DSL link is down.
DSL training in progress.
An OOF condition.
DSX-1
DTE
G.703
Green On
Off
Slow Cycling
Fast Cycling
DTE port is operational.
No signal on DTE port.
DSX-1: Yellow Alarm Indication received.
Sync DTE: Not applicable.
G.703: Remote Alarm Indication received.
DSX-1: OOF, LOF, EER, or AIS condition.
Sync DTE: Not applicable.
G.703: OOF, LOF, EER, or AIS condition.
*Slow Cycling: LED turns off and on in equal duration once per second.
Fast Cycling: LED turns off and on in equal duration 5 times per second.
Pulsing: LED turns off momentarily once per second.

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Connecting to a System Terminal
An optional system maintenance terminal may be attached to your Hotwire
79xx Standalone Termination Unit through the modular jack on the rear panel. The
system maintenance terminal allows you to view the status of the unit and change
configuration options. The terminal must be a VT100-compatible terminal or a PC
running terminal emulation software.
Procedure
To connect your unit to a system terminal:
1. Connect the 9-pin end of the terminal cable into a COM port on your PC.
2. Plug the other end into the modular jack on the rear panel.
3. Set the communication parameters on your PC or terminal to:
— 9600 baud
— 8 bit characters
— no parity
— 1 stop bit
— no flow control
Press Enter from your terminal or PC to activate the Main Menu for the attached unit.
The system runs diagnostics and status checks. After a few moments, the Main Menu
or Logon screen appears on your terminal.
ÎÎ
Î
main Hotwire
Model 79xx
MAIN MENU
Status
Test
Configuration
Control
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Ctrl-a to access these functions Exit

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Asynchronous Terminal Interface Menu
The following illustration shows the menu paths to the different terminal screens.
Main
Status Test
System and
Test Status Performance Statistics Display LEDs Identity
Network
Error
StatisticsNetwork
Performance
Statistics
Configuration Control
Factory
Config
Configuration
Loader
Current Configuration
Edit/Display
System
Options Communication Port Management and
Communication
Change
Identity
Administer
Logins
Download
Code Apply
Download
Reset
AutoRate
Device
Tests
Abort
All
Tests
99-16496
Reset
Device
Network
General SNMP
Management SNMP NMS Security
Communication
Protocol
Telnet
Session SNMP Traps
7974, 7984:DSX-1 Statistics
7975, 7985:(Not Applicable)
7976, 7986:G.703 Statistics
7974, 7984:Network and DSX-1Tests
7975, 7985:NetworkTests
7976, 7986:Network and G.703Tests
7974, 7984:(Not Applicable)
7975, 7985:Sync Data PortTests
7976, 7986:(Not Applicable)
7974, 7984:DSX-1
7975, 7985:Sync Ports
7976, 7986:G.703

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Entering Identity Information
After accessing your unit for the first time, use the Change Identity screen to determine
SNMP administrative system information that will be displayed on the Identity screen of
the Status branch. To access the Identity screen, follow this menu selection sequence:
Main Menu → Control → Change Identity
Selecting a Configuration Method
You can make configuration changes either through a VT100-compatible terminal and
the unit’s Configuration menus or by manually changing switches on the board. The
unit is shipped with the switchpacks disabled to allow settings to be made through the
Configuration menus. To use the switchpacks, see
Configuring the Unit Using the
Internal Switches
on page 23.
Configuring the Unit Using the Configuration Menus
Use the Configuration menu to select, display, or change configuration option settings.
NOTE:
The 79xx Standalone Termination Unit is shipped configured as an NTU. If you are
using this unit as an NTU, the configuration options may not need to be altered.
The 79xx Standalone Termination Unit has two sets of configuration option settings:
The Current Configuration: The 79xx Standalone Termination Unit’s active set of
configuration options.
The Default Factory Configuration: A read-only configuration area containing the
factory default configuration options.
Displaying Configuration Options
To display configuration options, you must first load a configuration into the edit area.
To load a configuration option set into the configuration edit area, follow this menu
selection sequence:
Main Menu → Configuration (Load Configuration From)
Make a selection by placing the cursor at your choice and pressing Enter.

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If you select . . . Then . . .
Current
Configuration The selected configuration option set is loaded and the Configuration Edit/Display menu screen appears.
Default Factory
Configuration The selected configuration option set is loaded and the Configuration Edit/Display menu screen appears.
Configuration
Loader The Configuration Loader screen is displayed allowing you to upload or download configurations from a TFTP server.
Configuration Edit/Display
The Configuration Edit/Display screen is displayed when the current, customer, or
default configuration is loaded. To access the Configuration Edit/Display screen, follow
this menu selection sequence:
Main Menu → Configuration → Current Configuration
– or –
Main Menu → Configuration → Default Factory Configuration
ÎÎ
Î
main/config/edit Hotwire
Model: 79xx
CONFIGURATION EDIT/DISPLAY
Network
DSX-1 | SYNC Port | G.703
System Options
Communication Port
Management and Communication
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Ctrl-a to access these functions, ESC for previous menu MainMenu Exit
Save

10
Select . . . To Access the . . . To Configure the . . .
Network Network Interface Options, Table 1 DSL network interface on
the unit.
DSX-1
SYNC Port
G.703
DSX-1 Interface Options, Table 2
Synchronous Data Port Options,
Table 3
G.703 Interface Options, Table 4
DSX-1 interface
(Models 7974, 7984);
Synchronous DTE interface
(Model 7975, 7985);
G.703 interface
(Models 7976, 7986)
System
Options System Options, Table 5 General system options of the unit.
Communication
Port Communication Port Options, Table 6 Unit’s COM port options.
Management
and
Communication
Telnet Session Options, Table 7
Communication Protocol Options,
Table 8
General SNMP Management
Options, Table 9
SNMP NMS Security Options,
Table 10
SNMP Traps Options, Table 11
Management support of the
unit through SNMP and
Telnet.
Table 1. Network Interface Options (1 of 2)
Margin Threshold
Possible Settings: –5db, –4db, –3db, –2db, –1db, 0db, 1db,2db,3db,4db,5db,
6db,7db,8db,9db,10db
Default Setting: 0db
Determines the level, expressed in decibels, at which a signal-to-noise margin alarm
condition is reported.
Excessive Error Rate Threshold
Possible Settings: 1E–4,1E–5,1E–6,1E–7,1E–8,1E–9
Default Setting: 1E–6
Determines the error rate at which an excessive error rate (EER) condition is
recognized. The rate is the ratio of the number of CRC errors to the number of bits
received in a certain period.

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Table 1. Network Interface Options (2 of 2)
AutoRate
Possible Settings: Enable, Disable
Default Setting: Disable
Determines whether the unit automatically adjusts to the best line rate for conditions,
or is fixed at the rate in the DSL Line Rate field.
DSL Line Rate
Possible Settings (depends on model): 144, 272, 400, 528, 784, 1040, 1552, 2064
Default Setting (Models 7974, 7984): 1552
Default Setting (Models 7975, 7985): 144
Default Setting (Models 7976, 7986: 2064
Determines the fixed line rate of the LTU when AutoRate is disabled, and the
maximum line rate that can be used when AutoRate is enabled.
Payload Rate
Possible Settings (depends on model): 64, 128, 192, 256, 320, 384, 448, 512, 576,
640, 704, 768, 832, 896, 960, 1024, 1088, 1152, 1216, 1280, 1344, 1408, 1472,
1536, 1600, 1664, 1728, 1792, 1856, 1920, 1984, 2048
Default Setting: [Highest multiple of 64 kbps supported by the DSL Line Rate]
Models 7974, 7976, 7984, 7986. When the NTU has an EIA-530-A interface, the
Payload Rate set on the LTU determines the port speed of the synchronous port of
the NTU.
Peer IP Address
Possible Settings: 001.000.000.000 – 223.255.255.255, Clear
Default Setting: 000.000.000.000
Specifies the peer IP address for the NTU, to provide remote management providing
the remote management link on the DSL loop.
Circuit Identifier
Possible Settings: [ASCII Text], Clear
Default Setting: [blank]
Uniquely identifies the circuit number of the transmission vendor’s DSL line for
troubleshooting purposes.

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Table 2. DSX-1 Interface Options – Models 7974 and 7984
Line Coding Format
Possible Settings: AMI, B8ZS
Default Setting: B8ZS
Specifies the line coding format to be used by the DSX-1 interface.
Line Framing
Possible Settings: ESF, D4
Default Setting: ESF
Specifies the framing format to be used by the DSX-1 interface.
Line Equalization
Possible Settings: 0–133, 133–266, 266–399, 399–533, 533–655
Default Setting: 0–133
Compensates for signal distortion for a DSX-1 signal over a given distance.
Send (AIS) on Network Failure
Possible Settings: Enable, Disable
Default Setting: Enable
Specifies the action taken on the signal transmitted to the DSX when a valid signal
cannot be recovered from the network interface (LOS or cognitions OOF, AIS, or
EER).
Send All Ones on DSX-1 Failure
Possible Settings: Enable, Disable
Default Setting: Enable
Specifies the action taken on the signal transmitted to the DSX when a valid signal
cannot be recovered from the network interface (LOS or conditions OOF, AIS, or
EER).
Primary Clock Source
Possible Settings: DSX, Internal
Default Setting: Internal
Specifies where the unit will derive its timing from.

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Table 3. Synchronous Data Port Options – Models 7975 and 7985 (1 of 2)
Port Type
Possible Settings: E530A, V.35, RS449, X.21
Default Setting: E530A
Determines the port type for the data port.
Payload Rate
Possible Settings: 64,128,192,256,320,384,448,512,576,640,704,768,832,
896,960,1024,1088,1152,1216,1280,1344,1408,1472,1536,1600,1664,1728,
1792,1856,1920,1984,2048
Default Setting: 128
Specifies the payload rate of the port. This option is not displayed on the unit when
AutoRate is enabled or the unit is configured as an NTU. The LTU configures the
payload rate for the NTU when AutoRate is disabled.
Transmit Clock Source
Possible Settings: Internal, External
Default Setting: Internal
Specifies whether the transmitted data for the synchronous data port is clocked using
an internal clock provided by the LTU (synchronized to the clock source specified by
the clock source configuration option) or an external clock provided by the DTE
connected to the synchronous data port. If an external clock is used, it must be
synchronized to the same clock source as the LTU.
Invert Transmit Clock
Possible Settings: Disable, Enable
Default Setting: Disable
Specifies whether the clock supplied by the termination unit on the TXC interchange
circuit DB (CCITT 114) is phase inverted with respect to the Transmitted Data
interchange circuit BA (CCITT 103). This configuration option is useful when long
cable lengths between the termination unit and the DTE are causing data errors.
Send All Ones on Data Port Not Ready
Possible Settings: Both, Disable, DTR, RTS
Default Setting: Both
Specifies the conditions on the data port that determine when valid data is not being
sent from the DTE. When this condition is detected, all ones are sent to the network.
Action on Network LOS Alarm
Possible Settings: Halt, None
Default Setting: Halt
Specifies the action taken on the synchronous data port when an LOS (Loss Of
Signal) alarm is received on the network interface.

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Table 3. Synchronous Data Port Options – Models 7975 and 7985 (2 of 2)
Network Initiated Data Channel Loopback
Possible Settings: Disable, Enable
Default Setting: Disable
Allows the initiation and termination of a Data Channel Loopback (DCLB) by the
receipt of a DCLB-actuate sequence or DCLB-release sequence from the network or
far-end device.
Port (DTE) Initiated Loopbacks
Possible Settings: Disable, DTLB, DCLB, Both
Default Setting: Disable
Allows the initiation and termination of a local Data Terminal Loopback (DTLB) or
remote Data Channel Loopback (DCLB) by the DTE connected to this port. (DTLB is
equivalent to a V.54 loop 3, and DCLB is equivalent to a V.54 loop 2.) Control of
these loopbacks is through the DTE interchange circuits as specified by the V.54
standard.
ElasticStore
Possible Settings: Disable, Enable
Default Setting: Enable
Used to enable or disable a first-in, first-out (FIFO) buffer circuit for the incoming
external clock. This circuit is used to compensate for the differences between the
frequencies of the data clocks for the two units in the circuit. This option only applies
if the unit is set for external timing. Do not enable Elastic Store if the attached DCE
has an elastic store buffer larger than 32 bits.

15
Table 4. G.703 Interface Options – Models 7976 and 7986
Framing
Possible Settings: Framed, Unframed
Default Setting: Framed
Specifies whether G.704 framing is used for the G.703 interface.
Line Coding Format
Possible Settings: AMI, HDB3
Default Setting: HDB3
Specifies the line coding format to be used by the G.703 interface.
Line Framing
Possible Settings: CRC4, noCRC4
Default Setting: noCRC4
Specifies the framing format to be used by the G.703 interface.
Time Slot 16
Possible Settings: Signaling, Data
Default Setting: Signaling
Specifies whether the G.703 interface is used for voice or data.
Send (AIS) on Network Failure
Possible Settings: Enable, Disable
Default Setting: Enable
Specifies the action taken on the signal transmitted to the G.703 when a valid signal
cannot be recovered from the network interface (LOS or conditions OOF, AIS, or
EER).
Primary Clock Source
Possible Settings: G.703, Internal
Default Setting: Internal
Specifies where the unit will derive its timing from.

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Table 5. System Options
DSL Mode
Possible Settings: LTU, NTU
Default Setting: NTU
Controls whether the unit is configured as a control unit or tributary unit.
NOTE: Changing this option will reset the termination unit.
Test Timeout
Possible Settings: Enable,Disable
Default Setting: Enable
Allows tests to end automatically. The feature should be enabled when the unit is
remotely managed so that control can be regained after a test is accidentally
executed.
Test Duration (min)
Possible Settings: 1–120
Default Setting: 10
Number of minutes for a test to be active before automatically ending.
Telco Initiated Loopback (Models 7974 and 7984)
Possible Settings: Enable,Disable
Default Setting: Enable
Determines if the unit will respond to loopback commands on the DSX-1 interface.
Remote Telco Line Loopback (Models 7974 and 7984)
Possible Settings: Enable,Disable
Default Setting: Disable
Determines if the unit will perform a Telco-initiated loopback on just the local unit or if
the loopback will be performed on the remote DSL unit.

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Table 6. Communication Port Options (1 of 2)
Port Use
Possible Settings: Terminal, Net Link
Default Setting: Terminal
Specifies how the communications port is to be used.
Port Type
Possible Settings: Asynchronous, Synchronous
Default Setting: Asynchronous
When Port Use is set to Net Link, Port Type controls whether the communication port
will be asynchronous or synchronous.
Data Rate
Possible Settings: 9.6, 14.4, 19.2, 28.8, 38.4, 115.2
Default Setting: 9.6
Specifies the communication port baud rate.
Character Length (Terminal Use Only)
Possible Settings: 7, 8
Default Setting: 8
Determines the character length of the communication port.
Parity (Terminal Use Only)
Possible Settings: None, Odd, Even
Default Setting: None
Specifies the parity of the communication port.
Stop Bits (Terminal Use Only)
Possible Settings: 1, 1.5, 2
Default Setting: 1
Specifies the number of stop bits for the communication port.
Ignore Control Leads (Terminal Use Only)
Possible Settings: Disable, DTR
Default Setting: Disable
Specifies whether DTR is used.
Login Required (Terminal Use Only)
Possible Settings: Enable, Disable
Default Setting: Disable
Specifies if an ID and password are required to access the asynchronous terminal
interface on the communication port. Login IDs are created with a password and
access level.

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Table 6. Communication Port Options (2 of 2)
Port Access Level (Terminal Use Only)
Possible Settings: Administrator, Operator
Default Setting: Administrator
Specifies the highest level of access allowed when accessing an ATI session through
a Telnet session.
Inactivity Timeout (Terminal Use Only)
Possible Settings: Enable, Disable
Default Setting: Disable
Provides automatic logoff of a Telnet session.
Disconnect Time (Minutes) (Terminal Use Only)
Possible Settings: 1 – 60
Default Setting: 5
Number of minutes of inactivity before the session terminates automatically. Timeout
is based on no keyboard activity.
Table 7. Telnet Session Options (1 of 2)
Telnet Session
Possible Settings: Enable, Disable
Default Setting: Enable
Specifies if the unit will respond to a Telnet session request from a Telnet client on an
interconnected IP network.
Telnet Login Required
Possible Settings: Enable, Disable
Default Setting: Disable
Specifies whether a user ID and password are required to access to the ATI through
a Telnet session. Login IDs are created with a password and access level.
Session Access Level
Possible Settings: Administrator,Operator
Default Setting: Administrator
The Telnet session access level is interrelated with the access level of the Login ID.
Inactivity Timeout
Possible Settings: Enable, Disable
Default Setting: Disable
Provides automatic logoff of a Telnet session.

19
Table 7. Telnet Session Options (2 of 2)
Disconnect Time (Minutes)
Possible Settings: 1 – 60
Default Setting: 5
Number of minutes of user inactivity before a Telnet session terminates
automatically. Time out is based on no keyboard activity.
Table 8. Communication Protocol Options (1 of 2)
Node IP Address
Possible Settings: 001.000.000.000 – 223.255.255.255
Default Setting: 000.000.000.000
Specifies the Node IP address.
Node Subnet Mask
Possible Settings: 000.000.000.000 – 255.255.255.255
Default Setting: 000.000.000.000
Specifies the Node Subnet Mask.
Default Network Destination
Possible Settings: None, COM, DSL
Default Setting: None
Specifies where the default management network is connected. For example, if your
default network is connected to the COM port, select COM as the default
management network destination.
Communication Port IP Address
Possible Settings: 001.000.000.000 – 223.255.255.255
Default Setting: 000.000.000.000
Specifies the unit’s Communication Port IP Address when the unit is configured as a
network communication link.
Communication Port Subnet Mask
Possible Settings: 000.000.000.000 – 255.255.255.255
Default Setting: 000.000.000.000
Specifies the unit’s Communication Port Subnet Mask when the unit is configured as
a network communication link.

20
Table 8. Communication Protocol Options (2 of 2)
Communication Port Link Protocol
Possible Settings: PPP,SLIP
Default Setting: PPP
Specifies the unit’s Communication Port link layer protocol when the unit is
configured as a network communication link.
Table 9. General SNMP Management Options
SNMP Management
Possible Settings: Enable, Disable
Default Setting: Disable
Enable or disables the SNMP management features.
Community Name 1
Possible Settings: ASCII text field, Public
Default Text: Public
Identifies the name of the community allowed to access the unit’s MIB. The
community name must be supplied by an external SNMP manager when that
manager attempts to access an object in the MIB.
Name 1 Access
Possible Settings: Read, Read/Write
Default Setting: Read
Determines the access level for Community Name 1.
Community Name 2
Possible Settings: ASCII text field, Public
Default Text: (null string)
Identifies the name of the second community allowed to access the unit’s MIB. The
community name must be supplied by an external SNMP manager when that
manager attempts to access an object in the MIB.
Name 2 Access
Possible Settings: Read, Read/Write
Default Setting: Read
Determines the access level for Community Name 2.