Paradyne Hotwire 7976 User manual

TM
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7976-A2-GZ40-00 March 1999
Hotwire7976 M/SDSL Standalone Termination Unit
with G.703 Interface
Installation Instructions
Document Number 7976-A2-GZ40-00
March 1999
Product Documentation on the World Wide Web
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products.
Complete documentation for this product is available at www.paradyne.com.
Select
Library → Technical Manuals → Hotwire DSL & MVL Systems.
Select the following document:
7976-A2-GB20
Hotwire 7976 M/SDSL Standalone Termination Unit, with G.703 Interface,
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
Installation Overview
Installation and configuration of the Hotwire7976 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 internal switchpacks or using the Configuration
Edit menus.
Before you install the Hotwire 7976 Standalone Termination Unit, read the
Important Safety Instructions on page 22.
Be sure to register your warranty at www.paradyne.com. Select Service &
Support
→ Warranty Registration.

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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 dc 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
power source as described in the documentation shipped with the power supply
and power cable.
Optional Power Sources
Using the optional dc power cable, the unit is capable of operating on either a
+24 Vdc power source, –48 Vdc single source battery, or –48 Vdc redundant
source batteries (for power backup).
Connecting the Unit to an Optional External +24 Vdc Power Source
Using the dc power cable, the Hotwire 7976 Standalone Termination Unit is
capable of operating on a +24 Vdc 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 7976 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
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 120-ohm connector and cable.
Connecting to a System Terminal
An optional system maintenance terminal may be attached to your Hotwire
7976 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

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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
Network Configuration
The following illustration shows several configurations including a network
application using a 4-port Hotwire 8776 M/SDSL Termination Unit in a central
office (CO). In this configuration, a frame relay switch and a router are
connected, through the termination unit, to partner units supporting a host or
router, and frame relay encapsulated or unframed data.
This figure also shows a standalone-to-standalone configuration using either
another Hotwire 7976 M/SDSL standalone unit with a G.703 interface or a
Hotwire 7975 M/SDSL standalone unit with an EIA-530A interface.
Frame
Relay
Switch
Router
E1 Host
(Frame Relay
Encapsulated
Data)
98-16093
Router
(Frame Relay
Encapsulated
Data)
G.703
G.703
Router 2.048 Mb
over
SDSL
G.703
G.703
G.703
8776 Termination Unit
in 8600 DSLAM
CO Site 7976
7976
7976
Customer
Premises (CP)
7976 7976
CP
NTU
CO Site
LTU
G.703 G.703
G.703
7976 7975
CP
NTU
CO Site
LTU
G.703 EIA 530A

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In a DSLAM-to-standalone configuration:
The devices synchronize without altering factory defaults, since the CO unit
defaults to LTU mode, and the CP unit defaults to NTU mode.
In a standalone-to-standalone configuration:
One unit must be changed to run in LTU mode, since standalone units have
a factory default setting of NTU mode.
In both cases the clocking source may have to be altered depending on network
requirements.
Choosing a Configuration Mode
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 comes configured to allow settings to be made through the
Configuration menus.
Configuring the Unit Using the Configuration Menus
Use the Configuration menu to select, display, or change configuration option
settings.
NOTE:
The 7976 Standalone Termination Unit is configured by default as an NTU. If
you are using this unit as an NTU, configuration options may not need to be
changed.
The 7976 Standalone Termination Unit has two sets of configuration option
settings:
The Current Configuration (the 7976 Standalone Termination Unit’s active set
of configuration options)
The Default Factory Configuration (a read-only configuration area containing
the factory default 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.
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.

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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
Î
ÎÎ
main/config/edit Hotwire
Model: 7976
CONFIGURATION EDIT/DISPLAY
Network
G.703
System Options
Communication Port
Management and Communication
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Ctrl-a to access these functions, ESC for previous menu MainMenu Exit
Save
Select . . . To Access the . . . To Configure the . . .
Network Network Interface Options, Table 1 DSL network interface on
the unit.
G.703 G.703 Interface Options, Table 2 G.703 interface.
System Options System Options, Table 3 General system options of
the unit.
Communication
Port Communication Port Options, Table 4 Unit’s COM port options.
Management
and
Communication
Telnet Session Options, Table 5
Communication Protocol Options,
Table 6
General SNMP Management
Options, Table 7
SNMP NMS Security Options,
Table 8
SNMP Traps Options, Table 9
Management support of the
unit through SNMP and
Telnet.

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Table 1. Network Interface Options
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.
AutoRate (LTU only)
Possible Settings: Enable, Disable
Default Setting: Disable
Specifies whether the DSL line will automatically train up to the best rate or be user
selectable.
AutoRate is only available when the standalone unit is configured as an LTU.
DSL Line Rate
Possible Settings: 400, 528, 784, 1040, 1552, 2064
Default Setting: 2064
Specifies the DSL line rate of the unit.
DSL Line Rate is only available when the standalone unit is configured as an LTU
and AutoRate is disabled (unit is in fixed rate).
Peer IP Address (LTU Only)
Possible Settings: 000.000.000.001 – 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.
Peer IP Address is only available when the standalone unit is configured as an
LTU.
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. G.703 Interface Options
Port Status
Possible Settings: Enabled, Disabled
Default Setting: Enabled
Specifies whether the port can be configured and used to transmit and receive data.
Framing
Possible Settings: Framed, Unframed
Default Setting: Framed
Specifies whether G.704 framing is used for the G.703 interface.
Line Framing (LTU Only)
Possible Settings: CRC4, noCRC4
Default Setting: noCRC4
Specifies the framing format to be used by the G.703 interface.
Line Framing is only available when the standalone unit is configured as an LTU,
AutoRate is disabled, and the DSL Line rate is 2064 kbps. Otherwise the noCRC4
framing format is used. The NTU is automatically configured to match the framing
format used by the LTU.
Line Coding
Possible Settings: AMI, HDB3
Default Setting: HDB3
Specifies the line coding format for the G.703 interface.
Time Slot 16 (LTU Only)
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.
Primary Clock Source is only available when the standalone unit is configured as
an LTU.

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Table 3. 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 card.
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.
Test Duration (min) appears when Test Timeout is enabled.
G.703 Line Termination
Possible Settings: 75 ohms, 120 ohms
Default Setting: 120 ohms
Specifies the impedance of the G.703 interface
Table 4. 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
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.

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Table 4. Communication Port Options (2 of 2)
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.
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.
Disconnect Time (minutes) appears when Inactivity Timeout is enabled.

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Table 5. Telnet Session Options
Telnet Session
Possible Settings: Enable, Disable
Default Setting: Enable
Specifies if the Termination 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.
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.
Disconnect Time (minutes) appears only when the Inactivity Timeout option is
enabled.

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Table 6. Communication Protocol Options
Node IP Address
Possible Settings: 000.000.000.000 – 223.255.255.255
Default Setting: 000.000.000.000
Specifies the Node IP address.
Node IP Address is only available when the standalone unit is configured as an
LTU.
Node Subnet Mask
Possible Settings: 000.000.000.000 – 255.255.255.255
Default Setting: 000.000.000.000
Specifies the Node Subnet Mask.
Node Subnet Mask is only available when the standalone unit is configured as an
LTU.
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: 000.000.000.000 – 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 IP Address is only used when the Port Use option on the
Communication Port Options menu is set to Net Link. If the COM Port IP address
is not set (000.000.000.000) the node IP address specified by the Node IP Port will
be used.
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.
Communication Port Subnet Mask is only used when the Port Use option on the
Communication Port Options menu is set to Net Link. If the COM Port IP address
is not set (000.000.000.000), the node IP Address will be used.
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.
Communication Port Link Protocol is only used when the Port Use option on the
Communication Port Options menu is set to Net Link.

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Table 7. General SNMP Management Options
SNMP Management
Possible Settings: Enable, Disable
Default Setting: Disable
Enables 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: Public
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.

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Table 8. SNMP NMS Security Options
NMS IP Validation
Possible Settings: Enable, Disable
Default Setting: Disable
Specifies whether security checking is performed on the IP address of SNMP
management systems attempting to access the node.
Number of Managers
Possible Settings: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Default Setting: 1
Specifies the number of SNMP management systems that can send SNMP messages.
NMS n IP Address
Possible Settings: 000.000.000.000 – 223.255.255.255, Clear
Default Setting: 000.000.000.000
Specifies the Internet Protocol address used to identify each SNMP manager.
Access Level
Possible Settings: Read, Read/Write
Default Setting: Read
Determines the access level allowed for an authorized NMS when IP address validation
is being performed.

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Table 9. SNMP Traps Options
SNMP Traps
Possible Settings: Enable, Disable
Default Setting: Disable
Controls the generation of SNMP trap messages. The options for addresses and types
of traps are located in this table.
Number of Trap Managers
Possible Settings: 1, 2, 3, 4, 5
Default Setting: 1
Sets the number of SNMP management systems that will receive SNMP traps.
NMS n IP Address
Possible Settings: 000.000.000.000 – 223.255.255.255, Clear
Default Setting: 000.000.000.000
Specifies the Internet Protocol address used to identify each SNMP trap manager.
NMS n Destination
Possible Settings: DSL, COM
Default Setting: DSL
Provides the network destination path of each trap manager.
General Traps
Possible Settings: Disable, Warm, AuthFail, Both
Default Setting: Both
Determines which SNMP traps are sent to each trap manager.
Enterprise Specific Traps
Possible Settings: Enable, Disable
Default Setting: Disable
Determines if SNMP traps are generated for enterprise-specific events.
Link Traps
Possible Settings: Disable, Up, Down, Both
Default Setting: Both
Determines if SNMP traps are generated for link up and link down for one of the
communication interfaces.
Link Trap Interfaces
Possible Settings: Network, SYNC, All
Default Setting: All
Determines if the SNMP linkUp , SNMP linkDown , and interface-related
enterpriseSpecific traps are generated for the network interface, synchronous data
(DTE) port, or both.

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Configuring AutoRate
The M/SDSL AutoRate function is controlled from the Network Interface Options
screen and allows you to enable or disable AutoRate only from a unit configured
as an LTU. To access the Network Interface screen, follow this menu selection
sequence:
NOTE:
AutoRate is designed to find the best rate possible for your DSL loop
conditions. After the DSL loop is up units should be configured to run in fixed
rate.
Main Menu → Configuration → Network
Î
ÎÎ
main/config/network Hotwire
Model: 7976
NETWORK INTERFACE OPTIONS
Margin Threshold: –3db
Excessive Error Rate Threshold: 1E–6
AutoRate Disable
DSL Line Rate 528
Peer IP Address: 111.255.255.000 Clear
Circuit Identifier: Clear
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Ctrl-a to access these functions, ESC for previous menu MainMenu Exit
Save

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Procedure
The AutoRate option is defaulted to Disable. To enable AutoRate:
1. Position the cursor in the AutoRate field and press the spacebar.
The AutoRate field toggles to Enable and the DSL Line Rate field displays.
2. Enter a DSL Line Rate and press Enter.
Your payload rate is set to a default value of 1984. Use Table 10, Fixed Rate
Payload Rates and DSL Line Rates, to set your DSL Line Rate and Payload
Rate according to whether you are configured for Voice (signaling) or Data.
Table 10 provides the maximum payload rates achievable for each DSL line rate
and the number of time slots required to achieve that payload rate depending on
whether you are using signaling (time slots 0 and 16) or data only (time slot 0).
Table 10. Fixed Rate Payload Rates and DSL Line Rates
Voice Mode
(G.703 to G.703) Data Mode (G.703 to G.703) Data Mode (G.703 to EIA-530)
DSL Line
Rate (kbps)
Maximum
Payload
Rate (kbps) Time
Slots
Maximum
Payload
Rate (kbps) Time
Slots
Maximum
Payload
Rate (kbps) Time
Slots
2064 1920 30 1984 31 1984 31
1552 1408 22 1472 23 1536 24
1040 896 14 960 15 1024 16
784 640 10 704 11 768 12
528 384 6 448 7 512 8
400 256 4 320 5 384 6

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Configuring the Unit Using the Internal Switches
If desired, use internal Switchpacks S1 and S2 to manually configure 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.
Procedure
To configure the unit using internal Switchpacks S1 and S2:
1. Power down the unit and disconnect the power supply.
2. Remove the enclosure cover:
— Insert a small, flat screwdriver blade into the slots on one side of the
cover and push to free the inner latches
— Lift off the cover to expose the circuit board
3. Locate Switchpack S1.
4. Set Switch 1 on Switchpack S1 to ON to enable Switchpacks 1 and 2.
5. After you enable the switchpacks, you must set the switches to your desired
configuration.
6. Replace and secure the cover.
7. Power up the board to reset and enable the new configuration.
496-15104

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7976-A2-GZ40-00 March 1999
Switchpack Locations
Use this illustration to locate Switchpacks S1 and S2.
98-16073
Switchpack S1 & S2
Front
S2
Rear
S1
678
ON
12345
678
ON
12345
Hotwire 7976 Standalone Termination Unit Switchpack Locations

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Switchpack Definitions
Manually change configuration options by moving Switchpack S1 DIP switches
on the card. Table 11 lists Switchpack S1 definitions.
Table 11. Switchpack S1 Definitions
Switch #. . . Allows you to . . .
Default in Bold
1Enable or disable Switchpacks S1 and S2.
OFF = Switchpacks Disabled
ON = Switchpacks Enabled
2Control line termination.
OFF = 120 Ohm
ON = 75 Ohm
3Select the unit’s primary timing source. Only valid for units configured
as LTU.
OFF = Internal Clock
ON = External Clock
4Control the unit’s E1 line coding.
OFF = HDB3
ON = AMI
5Control the unit’s G.704 framing.
OFF = Framed
ON = Unframed
6Enable CRC-4 monitoring. Only valid for units configured as LTU. The
NTU will automatically be configured to match the LTU setting.
OFF = Disable CRC-4 monitoring
ON = Enable CRC-4
7Control whether Channel 16 contains signaling information or data.
OFF = Channel 16 is used for signaling
ON = Channel 16 is used for data
8Not used