Page 1
FT1 DP
Fractional T1 Dataport For Nortel DE-4E Shelf
Installation and Maintenance
CONTENTS
1. GENERAL..................................................................1
2. INSTALLATION .......................................................2
3. CONNECTIONS ........................................................6
4. DSL SYSTEM TESTING ..........................................6
5. CONTROL PORT OPERATION ..............................7
6. DSL DEPLOYMENT GUIDELINES......................13
7. MAINTENANCE .....................................................14
8. TROUBLESHOOTING PROCEDURES ................14
9. PRODUCT SPECIFICATIONS...............................14
10. WARRANTY AND CUSTOMER SERVICE.........14
Appendix A. FT1 Loopbacks........................................ A-1
FIGURES
Figure 1. ADTRAN FT1 DP for Nortel DE-4E Shelf ...1
Figure 2. P1 Switch Location .........................................5
Figure 3. FT1 DP Edge Connector Wiring ....................6
Figure 4. Bantam Jack Arrangement..............................6
Figure 5. RS-232 (DB-9) Pin Assignments....................7
Figure 6. Introductory Menu Screen ..............................8
Figure 7. FT1 DP Main Menu Screen ............................8
Figure 8. Current System Status Screen.........................9
Figure 9. Performance History Screen .........................10
Figure 10. Loopback Options Screen .............................10
Figure 11. Self-Test Options Screen ..............................11
Figure 12. Provisioning Options Screen ........................11
Figure 13. Troubleshooting Screen ................................12
Figure 14. DSL Deployment Guidelines........................13
Figure A-1. FT1 Loopbacks .......................................... A-1
Figure A-2. FT1 DP Network Loopback....................... A-1
Figure A-3. FT1 DP CPE Loopback ............................. A-1
Figure A-4. FT1 Repeater #1 or # 2 Network Loopback . A-2
Figure A-5. FNID Network Loopback .......................... A-2
Figure A-6. FNID CPE Loopback ................................. A-2
TABLES
Table 1. Protected Loopback Mode Requirement ........2
Table 2. SW1 Option Settings.......................................3
Table 3. SW2 and SW3 Option Settings.......................4
Table 4. Front Panel Indicators and Switches ..............5
Table 5. Definition of Screen Abbreviations ................ 7
Table 6. Loop Insertion Loss Data..............................13
Table 7. Troubleshooting Guide .................................14
Table 8. FT1 DP Product Specifications ....................15
Table A-1. FT1 Loopback Select Codes ...................... A-1
Section 61245207L2-5C
Issue 3, July 2000
CLEI Code # D4D31R8D _ _
FT1 DP
1245207L1
8
7
9
6
10
5
11
4
12
3
2
DSL
SX
DS1
ALM
LB
AP
L
R
O
E
C
M
R
S
2
3
2
DSO
O
U
R
T
X
I
N
T
X
Figure 1. ADTRAN FT1 DP for Nortel DE-4E Shelf
1. GENERAL
This practice serves as an Installation and
Maintenance guide for the ADTRAN Fractional T1
Dataport (FT1 DP). The ADTRAN FT1 DP
(P/N 1245207L2) is the Central Office (CO) unit used
to deploy a repeater-less FT1 circuit using 2-wire
metallic facilities. The unit occupies one slot in a
standard Nortel DE-4E (or equivalent) shelf. Figure 1
is an illustration of the ADTRAN FT1 DP.
Revision History
This is the third release of this document.
Clarifications were made to the SW1 Option Settings.
Description
Signals are provided to and from the channel bank or
RT, while 2B1Q HDSL signals are provided to the
local loop.
Trademarks: Any brand names and product names included in this document are
trademarks, registered trademarks, or trade names of their respective holders.
1Section 61245207L2-5, Issue 261245207L2-5C
Page 2
C A U T I O N
The FT1 Digital Subscriber Loop (DSL) local loop
Note: Minimum of 35 TIP bytes required to disable
established latching loopback.
X = don't care bit.
Function
Sequence Byte Code # of Received
Bytes
Transition in progress
(TIP) X0111010
Loopback select
code (LSC)
X1010101 - OCU
X0110001 - CSU
X1000001 - NI
Loopback enabled
(LBE) X1010110
Far-end voice (FEV)
X1011010
Minimum of 35
TIP bytes
Minimum of 35
LSC bytes
Minimum of 100
LBE bytes
Minimum of 35
FEV bytes
Clear existing
loopbacks
Identify device
to be looped
Prepare loop,
send MAP code
after 30 bytes
Activate
loopback
operates as an independent subsystem, over a single
twisted pair. The FT1 DP communicates over this
twisted pair to the Fractional Network Interface
Device (FNID) and/or FT1 repeater listed below:
Part Number Unit Description
1242041LX ................. T400 FNID Circuit Pack
1245201LX ................. T200 FNID Circuit Pack
1242042LX ................. T400 FNID Standalone
1242050L2 .................. FT1 Repeater
1245211LX ................. FT1 Repeater
The payload between FT1 DP and FNID is
programmable from the faceplate rotary switch as
follows:
2 channels (minimum) ..................... 128 kbps
3 channels ........................................ 192 kbps
4 channels ........................................ 256 kbps
5 channels ........................................ 320 kbps
6 channels ........................................ 384 kbps
7 channels ........................................ 448 kbps
8 channels ........................................ 512 kbps
9 channels ........................................ 576 kbps
10 channels ...................................... 640 kbps
11 channels ...................................... 704 kbps
12 channels (maximum) .................. 768 kbps
Time Slot Allocation
The bandwidth may be taken by the FT1 DP in
contiguous or alternating time slots. These slots must
not have other channel cards plugged in the slots taken
by the FT1 DP bandwidth. This will cause contention
on the transmit side of the channel bank.
The FT1 will not wrap around the channels at the end
of the channel bank. For example, if n is equal to 4
channels and the FT1 DP is plugged into slot 23 of the
channel bank, then only channels 23 and 24 can be
used, not channels 1 and 2.
Protected Loopback
Protected Loopback prevents false latching loopback
occurrences when the latching loopback is embedded
within the customer payload. This feature is enabled
by setting SW1-8 to ON. See Table 1 for the latching
loopback sequence requirement when Protected
Loopback is enabled.
Table 1. Protected Loopback Mode Requirement
T1E1.2/99-007R1 (Latching Loopback)
The system carries a small amount of overhead used
for maintenance and performance monitoring related
functions.
NOTE
Changing the number of DS0s does not affect
unit provisioning.
2. INSTALLATION
After unpacking the unit, inspect it for damage. If
damage is noted, file a claim with the carrier, then
contact ADTRAN. See Warranty and Customer
C A U T I O N
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
!
Service.
The FT1 DP plugs directly into a Nortel DE-4E shelf.
The unit occupies a single slot. No installation wiring
is required.
Three switch packs (SW1, SW2, SW3) are used to
configure the mode of operation for the unit. A definition
of each switch is shown in Table 2 and Table 3.
Configuration may be performed by manually selecting
each option switch, or alternatively, set through the craft
interface. Manual configuration must be performed
before installing the unit into the channel bank.
2 Section 61245207L2-5, Issue 3 61245207L2-5C
Page 3
Table 2. SW1 Option Settings
(Default settings are indicated in bold typeface.)
Switch Function Description
SW1-1 ...... Code Select ............................................ SW1-1 On selects B8ZS line code. SW1-1 Off selects AMI.
Off .......... AMI
On .......... B8ZS
SW1-2 ...... Framing .................................................. SW1-2 Off selects SF. SW1-2 On selects ESF.
Off .......... SF
On .......... ESF
SW1-3 ...... Channel Select ....................................... Selects between Alternating and Contiguous DS0 channels.
Off .......... Alternate
On .......... Contiguous
SW1-4 ...... Latching Loopback ................................ Used to enable or disable latching loopbacks.
Off .......... Disabled
On .......... Enabled
SW1-5 ...... Loopback Timeout ................................. Used to enable or disable automatic loopback timeout.
Off .......... Automatic loopback timeout is disabled
On .......... Loopback timeout is enabled and set for 20 minutes.
SW1-6 ...... Dumb/Smart Channel Bank Enable ...... Used to select dumb or smart channel bank operation
Off .......... Unit is provisioned for an NT1 bank with a Smart Transmit/Receive
Unit (STRU) installed. Two-state signaling available (smart mode)
On .......... Unit is provisioned for an NT1 bank with a Transmit/Receive
Unit (TRU) installed. Four-state signaling available (dumb mode)
SW1-8 ...... Protected Loopback ............................... Used to enable or disable protective loopback.
Off .......... Disabled.
On .......... Enabled.
3Section 61245207L2-5, Issue 261245207L2-5C
Page 4
Table 3. SW2 and SW3 Option Settings
(Default settings are indicated in bold typeface)
Switch Function Description
SW3-4 ........... A/B Signaling for Channel 1 ....... Enables or Disables A/B Robbed Bit Signaling for Channel 1.
Off ........ A/B Signaling Disabled
On ......... A/B Signaling Enabled
SW3-3 ........... A/B Signaling for Channel 2 ....... Enables or Disables A/B Robbed Bit Signaling for Channel 2.
Off ........ A/B Signaling Disabled
On ......... A/B Signaling Enabled
SW3-2 ........... A/B Signaling for Channel 3 ....... Enables or Disables A/B Robbed Bit Signaling for Channel 3.
Off ........ A/B Signaling Disabled
On ......... A/B Signaling Enabled
SW3-1 ........... A/B Signaling for Channel 4 ....... Enables or Disables A/B Robbed Bit Signaling for Channel 4.
Off ........ A/B Signaling Disabled
On ......... A/B Signaling Enabled
SW2-8 ........... A/B Signaling for Channel 5 ....... Enables or Disables A/B Robbed Bit Signaling for Channel 5.
Off ........ A/B Signaling Disabled
On ......... A/B Signaling Enabled
SW2-7 ........... A/B Signaling for Channel 6 ....... Enables or Disables A/B Robbed Bit Signaling for Channel 6.
Off ........ A/B Signaling Disabled
On ......... A/B Signaling Enabled
SW2-6 ........... A/B Signaling for Channel 7 ....... Enables or Disables A/B Robbed Bit Signaling for Channel 7.
Off ........ A/B Signaling Disabled
On ......... A/B Signaling Enabled
SW2-5 ........... A/B Signaling for Channel 8 ....... Enables or Disables A/B Robbed Bit Signaling for Channel 8.
Off ........ A/B Signaling Disabled
On ......... A/B Signaling Enabled
SW2-4 ........... A/B Signaling for Channel 9 ....... Enables or Disables A/B Robbed Bit Signaling for Channel 9.
Off ........ A/B Signaling Disabled
On ......... A/B Signaling Enabled
SW2-3 ........... A/B Signaling for Channel 10 ..... Enables or Disables A/B Robbed Bit Signaling for Channel 10.
Off ........ A/B Signaling Disabled
On ......... A/B Signaling Enabled
SW2-2 ........... A/B Signaling for Channel 11 ..... Enables or Disables A/B Robbed Bit Signaling for Channel 11.
Off ........ A/B Signaling Disabled
On ......... A/B Signaling Enabled
SW2-1 ........... A/B Signaling for Channel 12 ..... Enables or Disables A/B Robbed Bit Signaling for Channel 12.
Off ........ A/B Signaling Disabled
On ......... A/B Signaling Enabled
4 Section 61245207L2-5, Issue 3 61245207L2-5C
Page 5
FT1 DP Option Selections
Configuration strap P1, illustrated in Figure 2, selects
FT1 DP settings.
P1
o
o
o
P1
-137 V
o
o
o
-190 V
Figure 2. P1 Switch Location
By selecting -190 V, the FT1 DP can power up to two
FT1 repeaters and a locally-powered FNID.
The settings on the FT1 DP are encoded and
transmitted to the FNID once the circuit has achieved
synchronization.
Faceplate Indicators
The FT1 DP has six faceplate LEDs which indicate
operational status. Table 4 defines these LEDs.
Indicators
DSL ........................
DS1 .........................
LB ...........................
SX ...........................
ALM .......................
Table 4. Front Panel Indicators and Switches
Description
Indicates four possible states of the quality of the DSL signal. (The signal quality has a provisionable
threshold of 2, 4, 6, or 8 dB above a 10-7 BER.)
Off ......................... No synchronization of FT1 DP and FNID
Yellow ................... Poor signal quality (below 2 dB above 10-7 BER)
Green .................... Good signal quality (above 2 dB above 10-7 BER)
Blinking ................ An error has been detected on the loop
Indicates four possible conditions:
Green .................... The customer-side DS1 signal is present and synchronized
Yellow ................... Yellow alarm at customer side DS1
Off ......................... No customer-side DS1 signal present
Blinking ................ An error has been detected at FNID input
Indicates three possible loopback states:
Off ......................... No active loopbacks
Blinking ................ FNID or repeater is in loopback
On (solid) ............. Local (FT1 DP) loopback is active
Sealing current is present
Indicate alarm condition
On ......................... Alarm condition detected either locally (FT1 DP) or remotely (FNID)
Off ......................... No alarm condition detected
AP ...........................
Rotary Switch .........
This LED will be On when Hardware Provisioning does not match software provisioning.
Selects number of DS0 channels. (See subsection 1 of this practice for a description of time slot allocation.)
5Section 61245207L2-5, Issue 261245207L2-5C
Page 6
3. CONNECTIONS
The FT1 DP occupies one card slot in a Nortel DE-4E
shelf. Power signaling is provided to the card through
the backplane of the channel bank. See Figure 3 for
FT1 DP edge connector wiring.
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
A32
A33
A34
A35
B6
B7
B8
B9
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
B25
B26
B27
B28
B29
B30
B31
B32
B33
B34
B35
DS0 Channel Tx Signal
B-Bit Tx Signaling Bus
DS0 Rx Clock
DS0 Tx Clock
Carrier Group Alarm
B-Bit Rx Signaling Strobe
Receive PCM
DS0 Byte Clock
HDSL Tip
5 V Ground
5 V Ground
DS0 Channel Rx Signal
A-Bit Tx Signaling Bus
DS0 Tx Bus Enable
Signaling Bus Enable
Rx Signaling Bus
A-Bit Rx Signaling Strobe
Transmit PCM
Frame Ground
-48 V
-48 V Return
DS0 Bit Clock
HDSL Ring
+5 V
level problems that may occur at installation or during
operation of the FT1 HDSL system. The following
subsections describe additional testing features
conducted with the front panel Bantam jacks as well
as other faceplate features.
Bantam Jack Description
The front panel of the FT1 DP contains DS0 splitting
Bantam jacks. The metallic splitting jacks provide an
intrusive, signal interrupting access to the first DS0
channel. It is very important to know the direction of
the access provided by a metallic splitting jack.
Detailed descriptions of the FT1 DP Bantam jacks are
given in the following subsection. Figure 4 shows the
Bantam jack arrangement and details for specific
jacks.
FT1 DP
TX
DS0 Interface
Logic Level - NEAR
RX
1
Channel Bank
Interface
Figure 4. Bantam Jack Arrangement
FT1 DP Bantam Jacks
The FT1 DP provides a set of dual Bantam jacks on
the front panel. These Bantam jacks allow connection
of a Tele-Path Instruments 108/109 RT II (or
equivalent) test set through one DS0 channel at
64 kbps for functions such as sending and receiving
bit error rate signals.
NOTE
The DS0 access jacks are logic level interface.
Figure 3. FT1 DP Edge Connector Wiring
4. DSL SYSTEM TESTING
The ADTRAN DSL system provides extensive ability
to monitor the status and performance of the DS1
signals and DSL loop signals. These features are
valuable in troubleshooting and isolating any system
FT1 DP Loopbacks
There are two loopbacks available to the FT1 DP.
FT1 DP network loopback loops the FT1 signal back
to the network. The FT1 DP CPE loopback loops the
FT1 signal back to the customer. The FT1 system
loopback capabilities are described in detail in
Appendix A of this practice.
1
Logic level NEAR loopback on the DS0 interface is toward the outside cable pair. The FT1 DP will support logic level FAR
loopback only in the presence of a BERT or loopback on the network end of the channel bank.
6 Section 61245207L2-5, Issue 3 61245207L2-5C
Page 7
5. CONTROL PORT OPERATION
The FT1 DP provides a faceplate-mounted DB-9
connector that supplies an RS-232 interface for
connection to a controlling terminal. The pinout of
the DB-9 is illustrated in Figure 5.
The terminal interface operates at data rates from
2.4 kbps to 19.2 kbps. The asynchronous data format
1
6
2
7
3
8
4
9
5
TXD (Transmit Data)
RXD (Receive Data)
SGN (Signal Ground)
Figure 5. RS-232 (DB-9) Pin Assignments
Table 5. Definition of Screen Abbreviations
is fixed at 8 data bits, no parity, and 1 stop bit. The
supported terminal type is VT-100 or compatible.
NOTE
If you are using a personal computer (PC)
with terminal emulation capability, be sure to
disable any power saving programs.
Otherwise, communication between the PC
and the HDSL unit may be disrupted, resulting
in misplaced characters or screen timeouts.
Operation
Abbreviations used in the screen diagrams are detailed
in Table 5.
A terminal session is initiated by entering multiple
Abbreviation
ES ...........................
SES .........................
UAS ........................
SF ............................
ESF .........................
B8ZS .......................
AMI ........................
LBO ........................
BPV ........................
Definition
Errored seconds
DS1 (SF) ....... Second in which a BPV or frame bit error occurs
DS1 (ESF) .... Second in which a BPV or CRC error occurs
DSL .............. Second in which a CRC error occurs
Severely errored seconds
DS1 (SF) ....... Second in which 1554 BPVs or 8 frame bit errors occur
DS1 (ESF) .... Second in which 1544 BPVs or 320 CRC errors occur
DSL .............. Second in which 165 CRC errors occur
Unavailable seconds
DS1 ............... Second in which there is a loss of signal or sync
DSL .............. Second in which there is a loss of signal or sync
Superframe format
Extended superframe format
Bipolar with 8-zero substitution
Alternate mark inversion
Line build-out
Bipolar violation
DS1 ............... Second in which a bipolar violation occurs
NIU .........................
S/N ..........................
15M ........................
24H .........................
T1 network interface unit
Serial number
Fifteen-minute period
Twenty-four-hour period
7Section 61245207L2-5, Issue 261245207L2-5C
Page 8
space bar characters, which are used by the FT1 DP to
determine the speed of the terminal. Once the speed
has been determined, an Introductory Menu will
appear, as illustrated in Figure 6.
From the Introductory Menu, the Main Menu may be
selected. The Main Menu provides access to detailed
performance and configuration information, as
illustrated in Figure 7.
The following screens can be accessed from the Main
Menu:
1. Current System Status
2. Performance History
3. ADTRAN Information
4. Loopback Options
5. Self-Test
6. Provisioning
7. Troubleshooting
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
For Information or Technical Support,
Normal Support Hours ( 7am - 7pm CST ) or Emergency Support Hours ( 7x24 )
Voice Toll Free: 800.726.8663 Fax: 256.963.6217
Voice: 256.963.8100 Internet: www.adtran.com
-----------------------------------------------------------------------------FT1-DP INFORMATION SIGNAL QUALITY FNID INFORMATION SIGNAL QUALITY
-------------------- [ ] 9 -------------------- [ ] 9
S/N : [ ] 8 S/N : DATA NOT AVAIL [ ] 8
CLEI: [ ] 7 CLEI: [ ] 7
MANF: / [ ] 6 MANF: [ ] 6
[ ] 5 [ ] 5
[ ] 4 [ ] 4
[ ] 3 [ ] 3
[ ] 2 [ ] 2
[ ] 1 [ ] 1
[ ] 0 [ ] 0
AT FT1-DP AT FNID
Press “M” to view Main Menu.
ADTRAN
Figure 6. Introductory Menu Screen
ADTRAN FT1 MAIN MENU
1) CURRENT SYSTEM STATUS
2) PERFORMANCE HISTORY
3) ADTRAN INFORMATION
4) LOOPBACK OPTIONS
5) SELF-TEST
6) PROVISIONING
7) TROUBLESHOOTING
Choose a screen by pressing the corresponding number.
Figure 7. FT1 DP Main Menu Screen
8 Section 61245207L2-5, Issue 3 61245207L2-5C
Page 9
The Current System Status Screen, illustrated in
Figure 8, provides quick access to FT1 DP status
information.
The Elapsed Time display indicates the period of time
since the unit began collecting performance
information. At each 15-minute interval, the
performance information is transferred to the
15-minute performance data registers accessed from
the Performance History screen. At each 24-hour
interval, the performance data is transferred into the
24-hour performance data register also accessed using
this screen.
Figure 8 consolidates current information for the DSL
and DS1 interfaces. A key to the information
provided is found in the center of the screen. Arrows
indicate the key applies to the FT1 DP. The following
defines terms used on this screen:
LOSS ....................... Pulse Attenuation
Measurement
SYNC ...................... DSL Loop 1 Sync Status
ES 15M/24H ............ Errored Seconds
SES 15M/24H .......... Severely Errored Seconds
UAS 15M/24H......... Unavailable Seconds
NOTE
The first number is for the current 15-minute
period. The second number is for the current
24-hour period.
A measure of signal quality for each DSL loop is
graphically depicted on the bottom right and left of the
screen. The measure is from 0 to 9 (poor to excellent
signal quality). Guidelines for interpreting the
indicators are:
0 ......... Poor signal quality. Noise margin is ≤ 0 dB
-7
(≈10
1-8 ...... Margin measurement above 10
BER).
-7
BER in dB.
9 ......... Excellent signal quality. Margin is ≥ 9 dB
above 10
-7
BER.
Predicting performance based upon signal quality
varies with each loop. Generally, a noise margin of
0 dB or higher will support a bit error rate (BER) of
-7
better than 10
.
Type “Z” at the Current System Status screen in order
to reset performance registers to zero at both the
Current System Status and Performance History
screens.
FT1-DP CURRENT SYSTEM STATUS FNID
NETWORK (DSL) ELAPSED TIME 00:08:18 CUSTOMER (DSL)
----------------------- ------------------ 00 dB <- LOSS -> 00 dB
NO <- SYNC -> NO
000/00000 <- ES 15M/24H -> 000/00000
000/00000 <- SES 15M/24H -> 000/00000
498/00498 <- UAS 15M/24H -> 498/00498
LOOPBACKS INACTIVE LOOPBACKS INACTIVE
FT1-DP SIGNAL QUALITY FNID DS1 FNID SIGNAL QUALITY
[ ] 9 -------------------- [ ] 9
[ ] 8 FRAME ——> SF [ ] 8
[ ] 7 CODE ——> AMI [ ] 7
[ ] 6 LBO ——> 0 dB [ ] 6
[ ] 5 BPV ——> 00000 [ ] 5
[ ] 4 ES ——> 00000 [ ] 4
[ ] 3 SES ——> 00000 [ ] 3
[ ] 2 UAS ——> 00000 [ ] 2
[ ] 1 ALARMS ——> NONE [ ] 1
[ ] 0 NO SEALING CURRENT [ ] 0
Press “Z” to zero registers, “M” for Main Menu.
Figure 8. Current System Status Screen
9Section 61245207L2-5, Issue 261245207L2-5C
Page 10
The Performance History Screen displays 15-minute
and 24-hour registers for several points in the circuit.
Figure 9 depicts the Performance History Screen.
PERFORMANCE HISTORY <VIEW 2 - FNID DS1 RECEIVER>
24 HOUR REGISTERS 15 MINUTE REGISTERS
---ES---SES-- --ES-SES-----------ES-SES 00000 00000 <---CURRENT---> 000 000
-1: ----- ----- <-- --> -1: --- --- -17: --- ---
-2: ----- ----- | | -2: --- --- -18: --- ---
-3: ----- ----- | | -3: --- --- -19: --- ---
-4: ----- ----- | | -4: --- --- -20: --- ---
-5: ----- ----- |PREVIOUS | -5: --- --- -21: --- ---
-6: ----- ----- | | -6: --- --- -22: --- ---
-7: ----- ----- <-- | -7: --- --- -23: --- -- | -8: --- --- -24: --- -- VIEW LOCATION DIAGRAM | -9: --- --- -25: --- -- | -10: --- --- -26: --- ---
-->|F| |F|--> | -11: --- --- -27: --- -- |T| |N| | -12: --- --- -28: --- -- |1|<-3-------DSL-----4->|I| | -13: --- --- -29: --- -- |D| |D| | -14: --- --- -30: --- --<--|P| | |<-2 | -15: --- --- -31: --- ---
--> -16: --- --- -32: --- ---
Figure 10 depicts the FT1 DP Loopback Options
Screen. Loopback may be initiated or terminated
using this screen. A status of current loopback
conditions also appear.
Press view number to select view, “M” to return to Main Menu
Figure 9. Performance History Screen
LOOPBACK OPTIONS
FT1-DP FNID
_____ _____
| | | |
| | | |
--->| | | |<-- | | | |
NET | |<===========================>| | CUST
| | | |
<---| | | |--->
| | | |
| | | |
|_____| |_____|
1) LOOPBACK TO NETWORK AT FT1-DP =INACTIVE
2) LOOPBACK TO CUSTOMER AT FT1-DP =INACTIVE
3) LOOPBACK TO NETWORK AT FNID =INACTIVE
4) LOOPBACK TO CUSTOMER AT FNID =INACTIVE
Press corresponding number to toggle loopback option.
Press “M” for Main Menu.
Figure 10. Loopback Options Screen
10 Section 61245207L2-5, Issue 3 61245207L2-5C
Page 11
Figure 11 depicts the Self-Test Options Screen. A
test of the FT1-DP and the FNID may be initiated
from this screen.
SELF-TEST
Press “S” to initiate FT1-DP and FNID self-tests.
Press “M” to return to the Main Menu.
Figure 12 shows the Provisioning Options screen.
Settings for all provisioning options may be
configured via the provisioning screen.
Figure 11. Self-Test Options Screen
___________________________________________________ ______________________
| | |
| PROVISIONS CURRENT SETTINGS | HARDWARE SETTINGS |
| ------------------------------------------ | ----------------- |
| 1. DS1 (FNID) LINE CODE = B8ZS | B8ZS |
| 2. DS1 (FNID) FRAMING = ESF | ESF |
| 3. DS1 (FNID) TX LEVEL = 0 dB | |
| 4. LOOPBACK TIMEOUT = 20 MIN | 20 MIN |
| 5. LATCHING LOOPBACK = ENABLED | ENABLED |
| 6. DSO SEQUENCE = CONTIGUOUS | CONTIGUOUS |
| 7. NUMBER OF DSOS = 12 (768Kbps) | 12 (768Kbps) |
| 8. SIGNALING ENABLED: | |
| 000000000000 | 000000000000 |
| CHANNELS 1 12 | 1 12 |
| “1” INDICATES SIGNALING ENABLED. | |
|___________________________________________________|______________________|
Press: “n” — to change corresponding provision (ex. “2” for FRAMING)
“H” — to copy hardware settings to current settings
“I” — to implement and save current setting changes
“M” — to return to the main menu
PROVISIONING
Figure 12. Provisioning Options Screen
11Section 61245207L2-5, Issue 261245207L2-5C
Page 12
The Troubleshooting Display, shown in Figure 13,
graphically depicts a DSL circuit. The unit monitors
red, yellow, and blue alarm conditions in the circuit.
Once a fault location is suspected, the corresponding
portion of the circuit on the screen is highlighted and a
message describing the failure will appear.
TROUBLESHOOTING DISPLAY
FT1-DP FNID
_____ _____
| | | |
| | | |
--->| | | |<-- | | | |
NET | |<===========================>| | CUST
| | | |
<---| | | |--->
| | | |
| | | |
|_____| |_____|
ALARMS: PROBLEM INDICATED:
FT1-DP CHANNEL BANK ALARM
FT1-DP RED DSL LOSS
Press “M” for Main Menu.
Figure 13. Troubleshooting Screen
12 Section 61245207L2-5, Issue 3 61245207L2-5C
Page 13
6. DSL DEPLOYMENT GUIDELINES
The ADTRAN FT1 DSL system is designed to
provide Fractional DS1 based services over loops
designed to comply with Carrier Service Area (CSA)
guidelines. CSA deployment guidelines are given
below.
1. All loops are non-loaded only.
2. For loops with 26-AWG cable, the maximum loop
length including bridged tap lengths is 9 kft.
3. For loops with 24-AWG cable, the maximum loop
length including bridged tap lengths is 12 kft.
4. Any single bridged tap is limited to 2 kft.
5. Total bridged tap length is limited to 2.5 kft.
6. The total length of multi-gauge cable containing
26-AWG cable must not exceed
12 - {(3*L26)/9} - L
26
L
L
= Total length of 26-AWG cable
BTAP
= Total length of all bridged taps
BTAP
(in kft)
excluding bridged taps (in kft)
(in kft)
Recommended maximum local loop loss information
for PIC cable at 70°F, 135Ω resistive termination, is
provided in Table 6.
Table 6. Loop Insertion Loss Data
Frequency (Hz) Maximum Loss (dB)
3000 .................................... 12.0
10,000 .................................... 15.0
50,000 .................................... 25.5
100,000 .................................... 30.0
150,000 .................................... 32.75
200,000 .................................... 35.25
An approximation for the maximum amount of
wideband noise on a DSL local loop as measured by a
50 kbps filter is ≤ 31 dBrn.
An approximation for the maximum level of impulse
noise as measured using a 50 kbps filter on a DSL
loop is ≤ 50 dBrn.
This deployment criteria is summarized in the chart
shown in Figure 14.
12
11
10
9
8
7
6
5
4
3
2
WORKING LENGTH OF 24 GAUGE (OR COARSER) CABLE (KFT)
VALID DSL CABLE LENGTHS
1
INVALID DSL CABLE LENGTHS
TOTAL
2.0
BRIDGED
1.5
1.0
TAP
0.5
LENGTH
0.0
2.5
(KFT)
NOTE
These approximations are to be used as
guidelines only and may vary slightly on
different loops. Adhering to the guidelines
should produce performance in excess of 10
BER.
-7
0
0
1234
WORKING LENGTH OF 26 GAUGE CABLE (KFT)
56789
Figure 14. DSL Deployment Guidelines
13Section 61245207L2-5, Issue 261245207L2-5C
Page 14
7. MAINTENANCE
The ADTRAN FT1 DP requires no routine
maintenance. In case of equipment malfunction, use
the features supplied with the FT1 DP to help locate
the source of the problem.
ADTRAN does not recommend that repairs be
performed in the field. Repair services may be
obtained by returning the defective unit to the
ADTRAN Customer Service RMA Department.
8. TROUBLESHOOTING PROCEDURES
Use Table 7 to troubleshoot the FT1 DP.
9. PRODUCT SPECIFICATIONS
Specifications for the FT1 DP are provided in
Table 8.
10. WARRANTY AND CUSTOMER SERVICE
ADTRAN will replace or repair this product within 10
years from the date of shipment if it does not meet its
published specifications or fails while in service (see
ADTRAN Carrier Networks Equipment Warranty,
Repair, and Return Policy and Procedure, document
60000087-10A).
Contact Customer and Product Service (CAPS) prior
to returning equipment to ADTRAN.
For service, CAPS requests, or further information,
contact one of the following numbers:
ADTRAN Sales
Pricing/Availability
(800) 827-0807
ADTRAN Technical Support
Presales Applications/Postsales Technical Assistance
(800) 726-8663
Standard hours: Monday-Friday, 7 a.m. - 7 p.m. CST
Emergency hours: 7 days/week, 24 hours/day
ADTRAN Repair/CAPS
Return for Repair/Upgrade
(256) 963-8722
Repair and Return Address
ADTRAN, Inc.
CAPS Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
Table 7. Troubleshooting Guide
Condition Solution
All front panel indicators are off. 1. Verify that the FT1 DP is properly seated in the housing.
2. Make sure power supply feeding the FT1 DP is good.
3. If Steps 1 and 2 pass, replace the FT1 DP.
Power OK but does not achieve Loop Sync (DSL LED is off). 1. Verify that the loop conforms with CSA guidelines
(not too long, etc.).
2. Verify that the Loop Loss at 200 kHz is not greater
than 36 dB.
3. Verify that noise on the DSL Loop is within acceptable
limits.
4. If Steps 1 through 3 pass and Loop Sync is still not
available, replace the unit with an FT1 DP unit known to be
in good working condition.
14 Section 61245207L2-5, Issue 3 61245207L2-5C
Page 15
Table 8. FT1 DP Product Specifications
Loop Interface
Modulation Type............................... 2B1Q
Mode ................................................. Full Duplex, Echo Cancelling
Number of Pairs ................................ One
Bit Rate ............................................. 784 kbps
Baud Rate .......................................... 392K baud
Service Range ................................... Defined by Carrier Service Area Guidelines
Loop Loss .......................................... 36 dB maximum @ 200 kHz
Bridged Taps ..................................... Single taps < 2 kft, total taps < 2.5 kft
Performance ...................................... Compliant with Bellcore TA-NWT-001210
Return Loss ....................................... 20 dB (40 kHz to 200 kHz)
DSL Tx Signal Level ........................ 13.5 dBm
Input Impedance ............................... 135Ω
Return Loss ....................................... 20 dB (40 kHz to 200 kHz)
DS1 Facility Interface
Fully compatible with Nortel DE-4E shelf
Power
Tested with the ADTRAN FT1 Repeater (P/N 1245211L1) and the ADTRAN FNID (P/N 1245201L1)
Total Power ....................................... -48 VDC @ 125 mA with FNID
-48 VDC @ 215 mA with FNID and FT1 Repeater
-48 VDC @ 300 mA with Local Power FNID and two FT1 Repeaters
FT1 DP Power Dissipation ............... 3.7 watts with FNID
5.2 watts with FNID and FT1 Repeater
6.1 watts with Local Power FNID and two FT1 Repeaters
Span Power ....................................... 137 V or -190 VDC (nominal)
Fusing 1.00 A (not field-replaceable)
Clock Sources
Clock Sources ................................... Internal, DS1 Derived
Internal Clock Accuracy ................... ± 25 ppm, (exceeds Stratum 4). Meets T1.101 timing requirements.
Tests
Diagnostics ........................................ Self-Test, Local Loopback (FT1 DP), Remote Loopback (FNID)
Mechanical
Dimensions ....................................... 6.2" High, 1.1" Wide, 10.2" Deep, 16 ounces, nominal
Plugs into Nortel DE-4E (or equivalent) shelf
Environment
Temperature ...................................... Operating (Standard): -40° to +70°C; Storage: -40° to +85°C
Relative Humidity ............................. Up to 95%, non-condensing
Part Number ....................................... 1245207L2
15Section 61245207L2-5, Issue 261245207L2-5C
Page 16
16 Section 61245207L2-5, Issue 3 61245207L2-5C
Page 17
Appendix A
FT1 Loopbacks
GENERAL
This Appendix is an overall reference to the loopback
capabilities of the ADTRAN Fractional T1 system.
Included in this Appendix is a description of the FT1
loopbacks and the methods for activating the FT1
loopbacks.
FT1 LOOPBACKS
Figure A-1 shows the application from the central
office (CO) to customer premises. The FT1 Repeaters
are shown for convenience and are not necessary parts
of the FT1 network. The loopbacks shown are as
follows:
A. FT1 DP network loopback
B. FT1 DP CPE loopback
C. FT1 Repeater # 1 network loopback
D. FT1 Repeater # 2 network loopback
E. FNID network loopback
F. FNID CPE loopback
There are two loopbacks available to the FT1 DP.
The FT1 DP network loopback loops the FT1 signal
back to the network. The FT1 DP CPE loopback
loops the FT1 signal back to the customer.
The FT1 DP network loopback is a digital loopback
toward the CO (see Figure A-2). This loopback is
initiated by the OCU latching loopback command
(N1010101), or by the craft interface, when available.
The OCU latching loopback code is detected in the
primary DS0 of the FT1 circuit (the channel where the
FT1 DP is physically installed) to control the FT1
circuit looping. When the FT1 circuit is looped, all
DS0s in use will be looped back toward the network.
The DS0s will be transmitted on to the customer.
The FT1 DP CPE loopback is a digital loopback
toward customer premises as shown in Figure A-3.
This loopback is initiated by the REM LBK button on
the FNID, or by the craft interface when available.
When the FT1 circuit is looped, all DS0s in use will
be looped back toward the customer. All DS0s in use
will be filled with all 1s and sent toward the network.
DSX-1
Interface
Central Office
FT1 DP
A
D4
Channel Bank
B
C
DSX-1
Interface
Central Office
DSX-1
Interface
Central Office
D
FT1
Repeater
EF
FT1
Repeater
#1 #2
Figure A-1. FT1 Loopbacks
FT1 DP
D4
Channel Bank
HDSL
Local Loop
Figure A-2. FT1 DP Network Loopback
FT1 DP
D4
Channel Bank
HDSL
Local Loop
FNID
FNID
FNID
T1 NIU
DS1
Interface
Customer Premises
DS1
Interface
Customer Premises
Customer
Premises
Equipment
Figure A-3. FT1 DP CPE Loopback
A-1Section 61245207L2-5, Issue 361245207L2-5C
Page 18
There is one loopback available to the FT1 Repeaters.
The FT1 Repeater Network loopback is a digital
loopback toward the CO as shown in Figure A-4.
The loopbacks are initiated by the DDS latching
loopback codes for NEI Position 1 (N1000001) for
FT1 #1 or NEI Position 2 (N100001) for FT1
Repeater # 2. The NEI latching loopback is detected
in the primary DS0 of the FT1 circuit, the channel
where the FT1 DP is physically installed, to control
the looping of the FT1 circuit. When the FT1 circuit
is looped, all DS0s in use will be looped. The DS0s in
use will also be transmitted on to the customer.
There are two loopbacks available to the FNID. The
FNID network loopback loops the FT1 signal back
toward the network. The FNID CPE loopback loops
the FT1 signal back toward the customer.
The FNID network loopback is a digital loopback
toward the CO as illustrated in Figure A-5. This
loopback is initiated by the DDS latching loopback
code for NEI Position 1 (N1000001) for a
non-repeatered loop, or NEI Position 2 (N1000001)
for a single repeater loop or by NEI Position 3
(N1000001) for a two repeater loop; by the craft
interface when available, or by the REM LBK button
at the FT1 DP. The NEI Position 1 latching loopback
is detected in the primary DS0 of the FT1 circuit (the
channel in which the FT1 DP is physically installed),
to control the looping of the FT1 circuit. When the
FT1 circuit is looped, all DS0s in use will be looped.
The DS0s in use will be filled with all 1s and
transmitted toward the customer.
The FNID CPE loopback is a digital loopback toward
customer premises as shown in Figure A-6. This
loopback is initiated by the craft interface, when
available. When the FT1 circuit is looped, all DS0s in
use will be looped. The data in the DS0s in use will
be transmitted toward the network.
DSX-1
Interface
Central Office
Interface
Central Office
Channel Bank
DSX-1
DSX-1
Interface
HDSL
FT1 DP
D4
FT1
Repeater
# 1 or 2
Local Loop
Figure A-4. FT1 Repeater # 1 or 2 Network Loopback
FT1 DP
D4
Channel Bank
HDSL
Local Loop
Figure A-5. FNID Network Loopback
FT1 DP
HDSL
FT1-NID
FNID
DS1
Interface
FNID
Customer Premises
DS1
Interface
Customer Premises
DS1
Interface
Central Office
Local Loop
D4
Channel Bank
Customer Premises
Figure A-6. FNID CPE Loopback
A-2 Section 61245207L2-5, Issue 3 61245207L2-5C
Page 19
LOOPBACK ACTIVATION/DEACTIVATION
This section describes loopback activation and
deactivation methods for the ADTRAN Fractional T1
system. Loopback activation and deactivation is
controlled with the push-button located on the front
panel, through craft interface, or latching loopback
codes.
Both the FNID and the FT1 DP have a push-button
located on the front panel labeled REM LBK or RLB
which controls the activation of remote loopback.
Pressing REM LBK or RLB on the FNID activates
FT1 DP CPE loopback. Pressing REM LBK or RLB
on the FT1 DP activates FNID network loopback or
repeater loopback when a repeater is present. Remote
loopback is deactivated by pressing the REM LBK or
RLB or waiting for the 20-minute loopback timeout, if
enabled.
The FNID and FT1 DP (when available) have a craft
interface located on the front panel of the device. The
craft interface allows access to the FT1 device through
an RS-232-type interface. All loopbacks for the FNID
and FT1 DP can be controlled from the craft interface.
The craft interface on the FNID can activate and
deactivate the FNID network loopback and the FNID
CPE loopback. The FNID craft interface can also
remotely activate and deactivate the FT1 DP network
loopback, FT1 DP CPE loopback, and the repeater
network loopback. The craft interface on the FT1 DP
can activate and deactivate the FT1 DP network
loopback and the FT1 DP CPE loopback. The FT1
DP craft interface can also remotely activate and
deactivate the FNID network loopback and the FNID
CPE loopback and the repeater network loopback.
FT1 DP, FT1 Repeater, and FNID network loopbacks
can be activated by the DDS latching loopback
sequence. The latching loopback sequence is detected
in the primary DS0 of the FT1 system. When the
loopback is activated on the device, the whole FT1
bandwidth is looped. The FT1 DP, FT1 Repeater, and
FNID each respond to a different loopback select code
allowing for sectionalization of the network during
testing. Table A-1 is a list of FT1 devices and their
loopback select codes.
Latching loopbacks for the FT1 system are activated
by transmitting the following latching loopback
sequence in the primary DS0 of the FT1 system:
A.Minimum of 35 transition in progress (TIP) bytes
(N0111010).
B. Minimum of 35 loopback select code (LSC) bytes as
defined in Table 1.
C. Minimum of 100 loopback enable (LBE) bytes
(N1010110).
D.Minimum of 35 all 1s bytes (S1111111), plus a
minimum of 100 LBE bytes. (N-1) iterations, where
N is the number of channel units of the same type
(i.e., same LSC) that lie between the test center and
the loopback to be operated. This step is only used
when there are identical channel units in tandem.
E. Minimum of 32 far end voice (FEV) bytes
(N1011010).
A 25-second watchdog timer is activated between the
35 TIP bytes and 35 LSC bytes, between the 35 LSC
bytes and 100 LBE bytes, and between the 100 LBE
bytes and 32 FEV bytes. The timer requires the
correct receipt of the latter sequences less than 25
seconds after receipt of the prior sequence. This
prevents inadvertent setting of the latching loopbacks.
Latching loopbacks for the FT1 system are
deactivated by transmitting the following latching
loopback sequence in the primary DS0 of the FT1
system:
Minimum of 35 TIP bytes (N0111010).
LOOPUP STATE
In the loopup state, the active FT1 loopback will
provide a continuous loop for the FT1 bandwidth.
The data flow is continuously monitored for the loop
deactivation commands to deactivate the loopbacks.
Also, a 20-minute loopback timeout is checked. If the
loopback timeout is enabled, any loopback that is in
the loopup state for 20 minutes will be deactivated.
Table A-1. FT1 Loopback Select Codes
FT1 Device Loopback Select Loopback Select
Code Name Code Byte
FT1 DP .............................. OCU loopback .................. N1010101
FT1 Repeater #1 ................ NEI Position 1 loopback ... N1000001
FT1 Repeater #2 ................ NEI Position 2 loopback ... N1000001
FNID without repeater ...... NEI Position 1 loopback ... N1000001
FNID with one repeater .... NEI Position 2 loopback ... N1000001
FNID with two repeaters .. NEI Position 3 loopback ... N1000001
A-3Section 61245207L2-5, Issue 361245207L2-5C
Loading...