ADTRAN FT1 DP User Manual

HDSL Quick Installation Guide

for ADTRAN FT1 DP and FNID

PRACTICES

Three eight-position switch packs (SW1, 2, 4) and two four-position switch packs (SW3, 5) are used to configure
FT1 DP mode of operation as listed in the table below. Refer to ADTRAN Installation/Maintenance practices for more
information.

Option Settings

(arrows indicate default settings)

Switch Function

SW1-1 ............. Channel Select

Closed ............. Alternate

Open ............... Contiguous

Description

Selects between alternating and contiguous DS0 channels.

SW1-2 ............. Auto Code Detect

Closed ............. Auto

Open ............... Manual

SW1-3 ............. Manual Code Select

Closed ............. AMI

Open ............... B8ZS

SW1-4 ............. Auto Frame Detect

Closed ............. Auto

Open ............... Manual

SW1-5 ............. Framing

Closed ............. Superframe Format (SF)

Open ............... Extended Superframe Format (ESF)

SW1-6 ............. Latching Loopback

Closed ............. Enabled

Open ............... Disabled

SW1-7 ............. Loopback Timeout

Closed ............. 20 Minutes

Open ............... None

SW1-8 ............. Loopback Keep Alive

Closed ............. AIS

Open ............... All 1s, framed

SW2-8, 2-7...... DS1 Transmit Level

Open, Open .... 0 dB

Open, Closed.. -7.5 dB
Closed, Open.. -15 dB
Closed, Closed -22.5 dB

SW3-1 ............. Idle Code Detect

Closed............. Auto

Open ............... Manual

SW 3-2 ............ Idle Code

Closed............. FF

Open ............... 7F

SW4-1-SW4-8 Channels 1-8 A/B Signaling

Closed............. Enabled

Open ............... Disabled

SW5-1-SW5-5 Channels 9-12 A/B Signaling

Closed............. Enabled

Open ............... Disabled

When this switch is closed, the unit automatically detects the line code as B8ZS or
AMI.

When SW1-2 is open, SW1-3 open selects B8ZS line code, while SW1-3 closed
selects AMI.

When this switch is closed, Auto Frame Mode detection is enabled and the unit
selects between SF and ESF modes automatically. When open, SW1-5 manually
selects the framing mode.

When SW1-4 is open, SW1-5 closed selects SF. SW1-5 open selects ESF.

This switch is used to enable or disable latching loopbacks.

SW1-7 is used to enable or disable automatic loopback timeout.

Sets the data pattern sent to the customer upon FNID network loopback.

The DS1 signal level delivered to the customer through the FNID may be selected
as one of four values: 0, -7.5, -15, or -22.5 dB.

When SW3-1 is closed, auto idle code detection is enabled and the unit selects
between 7F (Hex) and FF (Hex).

When SW3-1 is open and SW3-2 is closed, selects FF (Hex). When SW3-2 is open,
selects 7F (Hex).

This switch enables or disables A/B signaling for Channel 1-8 of the selected FT1
channels.

This switch enables or disables A/B signaling for Channels 9-12 of the selected FT1
channels.

FNID
SW1, SW2
20 mA, 60 mA
Off, On

Indicates default setting

POWER

LOCAL SPAN

Powered

by -48

VDC

Powered

by span

current

SW1

DS1 SEALING CURRENT

20MA
60MA

20 mA sealing current select

OFF
ON

SW2

Sealing current disabled
Sealing current enabled

1Section 61242.047L2-13, Issue 161242.047L2-13A

FT1-DP FT1-Repeater

FNID

Channel Bank

Backplane

12
11
10

9
8
7
6

Loop 1 Loop 15

Central Office Customer Premises

2B1Q

12 kft 24-AWG

9 kft 26-AWG

(max.)

6

3
4

2B1Q

12 kft 24-AWG

9 kft 26-AWG

(max.)

7

13

Loop Insertion Loss Data

INVALID HDSL CABLE LENGTHS

Frequency (Hz) Maximum Loss (dB)

3,000 12.0
10,000 15.0
50,000 25.5

100,000 30.0
150,000 32.75
200,000 35.25

2.5

2.0

TOTAL

BRIDGED

1.5

1.0

TAP

0.5

LENGTH

(KFT)

0.0

5
15

DS1

55
49

5
4
3
2

WORKING LENGTH OF 24 GAUGE (OR COARSER) CABLE (KFT)

VALID HDSL CABLE LENGTHS

1
0

0

1234

WORKING LENGTH OF 26 GAUGE CABLE (KFT)

56789

HDSL Loss Values

(200 kHz cable loss in dB/kft at 135Ω)

Cable Cable Temperature:
Gauge Type 68° 90° 120°

26 PIC 3.902 4.051 4.253
26 Pulp 4.030 4.179 4.381
24 PIC 2.863 2.957 3.083
24 Pulp 3.159 3.257 3.391
22 PIC 2.198 2.255 2.333
22 Pulp 2.483 2.45 2.629
19 PIC 1.551 1.587 1.634
19 Pulp 1.817 1.856 1.909

These approximations are to be used as guidelines
only and may vary slightly on different loops. Adhering
to these guidelines should produce performance in
excess of 10

-7

BER.

ADTRAN Customer Service:

ADTRAN Telco Technical Support............... [phone]

Standard support hours ................................ Monday-Friday

7 a.m. - 7 p.m. CST

Emergency support ................... 7 days/week, 24 hours/day

Sales .............................................................[phone]

RMA (repair service).................................... [phone]

Repair and Return Address:

ADTRAN, Inc.
Customer Service Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807

2 Section 61242.047L2-13, Issue 1 61242.047L2-13A