ADTRAN DE-4E User Manual

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Section 61245207L2-5C

Issue 3, July 2000

CLEI Code # D4D31R8D _ _

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

	FT1 DP
	1245207L1
6	7	8 9	10
5			11
4			12
3			12
2
DSL			SX
DS1			SX
DS1			ALM
LB			ALM
LB			AP
			AP
L			R
O			R
C			E
			M
			R
			S
			2
			3
			2
O		DSO
O
U			R
T			R
T			X
I			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.

61245207L2-5C	Section 61245207L2-5, Issue 2	1
	Trademarks: Any brand names and product names included in this document are

trademarks, registered trademarks, or trade names of their respective holders.

The FT1 Digital Subscriber Loop (DSL) local loop 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

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

C A U T I O N !

SUBJECT TO ELECTROSTATIC DAMAGE

OR DECREASE IN RELIABILITY.

HANDLING PRECAUTIONS REQUIRED.

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 Service.

The FT1 DP plugs directly into a Nortel DE-4E shelf. The unit occupies a single slot. No installation wiring is required.

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)

Function
Sequence	Byte Code		# of Received
Bytes

Clear existing	Transition in progress		Minimum of 35
loopbacks	(TIP) X0111010		TIP bytes
Identify device	Loopback select		Minimum of 35
to be looped	code (LSC)		LSC bytes
	X1010101	- OCU
	X0110001	- CSU
	X1000001	- NI
Prepare loop,	Loopback enabled		Minimum of 100
send MAP code	(LBE) X1010110		LBE bytes
after 30 bytes
Activate	Far-end voice (FEV)		Minimum of 35
loopback	X1011010		FEV bytes

Note: Minimum of 35 TIP bytes required to disable established latching loopback.

X = don't care bit.

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.

Section 61245207L2-5, Issue 3

61245207L2-5C

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.

61245207L2-5C

Section 61245207L2-5, Issue 2

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

Section 61245207L2-5, Issue 3

61245207L2-5C

FT1 DP Option Selections

Configuration strap P1, illustrated in Figure 2, selects FT1 DP settings.

P1
o
o
o
P1	-137 V
o	-137 V
o
o
-190V

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.

Figure 2. P1 Switch Location

		Table 4. Front Panel Indicators and Switches
Indicators	Description

DSL ........................	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
DS1 .........................	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
LB ...........................	Indicates three possible loopback states:
	Off .........................	No active loopbacks
	Blinking ................	FNID or repeater is in loopback
	On (solid) .............	Local (FT1 DP) loopback is active
SX ...........................	Sealing current is present
ALM .......................	Indicate alarm condition
	On .........................	Alarm condition detected either locally (FT1 DP) or remotely (FNID)
	Off .........................	No alarm condition detected
AP ...........................	This LED will be On when Hardware Provisioning does not match software provisioning.
Rotary Switch .........	Selects number of DS0 channels. (See subsection 1 of this practice for a description of time slot allocation.)

61245207L2-5C

Section 61245207L2-5, Issue 2

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.

5 V Ground

DS0 Channel Rx Signal

DS0 Channel Tx Signal

A-Bit Tx Signaling Bus

A10

B10

B-Bit Tx Signaling Bus

DS0 Tx Bus Enable

A11

B11

DS0 Rx Clock

Signaling Bus Enable

A12

B12

DS0 Tx Clock

Rx Signaling Bus

A13

B13

Carrier Group Alarm

A-Bit Rx Signaling Strobe

A14

B14

B-Bit Rx Signaling Strobe

Transmit PCM

A15

B15

Receive PCM

A16

B16

A17

B17

A18

B18

Frame Ground

A19

B19

-48 V

A20

B20

-48 V Return

A21

B21

A22

B22

A23

B23

A24

B24

A25

B25

A26

B26

DS0 Bit Clock

A27

B27

A28

B28

A29

B29

A30

B30

A31

B31

A32

B32

DS0 Byte Clock

A33

B33

HDSL Ring

A34

B34

+5 V

A35

B35

HDSL Tip

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	Channel Bank
	DS0 Interface 1	Channel Bank
		Interface
		Interface
	Logic Level - NEAR
	RX
	RX

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.

1Logic 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.

Section 61245207L2-5, Issue 3

61245207L2-5C

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