Verilink DDS Lite Installation Guide

DDS Lite

Quick Start Guide

45-00150

2.0

Note: F o r more inf ormation about the DDS Lite,
see the reference manual, part number
34-00295, on the User Documentation CD or at
www.verilink.com.

Specifications

Network Interface

Line Rate: 2.4, 4.8, 9.6, 19.2, 28, 38.4,

56, and 64 kbps

Line Code: AMI
Line Impedance: Balanced 135 Ω
Input Signal: +1 to −40 dB (ALBO)
Output Signal: 3.0 V (± 15%) base-peak

into 135 Ω,

1.5 V (± 15%) at the 9.6
kbps line rate

Line Protection: 1000 V lightning, input /

output

Mechanical

Mounting: desktop or wall mount
Dimensions: 1.25" H, 3.50" W, 5.75" D
Weight: 1 pound

Pow er S o u rc e

External: Input: 115 VAC

Output: 9 VAC, 400 mA, min.

Industry Standards

FCC Compliance:Part 15 Cla ss A

Subpart B, Pa rt 68
U.S. Safety: UL 1950
Canadian Safety: CSA C22 .2 No. 950 - 95
Industry Canada: CS - 03 , Issue 8
Bellcore GR-1089-CORE

Environmental

Operating Temp: 0° to 50°C (32° to 122°F)
Storage Temp: −20° to 70°C

(−4° to 158°F)
Humidity: 95% max (non- condensing)

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DDS Lite

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Pre-Installation Information

All direct connections to DDS lines must be
made using standard plugs and jacks.

Before connecting the unit, inform the
local telephone company of the following
information.

REN/

Port ID

2.4

4.8

9.6

38.4
56
64

SOC kbps

6.0 N 2.4

4.8

9.6

38.4
56
64

FIC USOC

04DU5-24
04DU5-48

RJ-48S

jack
04DU5-96
04DU5-38
04DU5-56
04DU5-64

Wallmount Installation
Using Screws

1 Select a place close to a 115 VAC outlet with

clearance for the signal and power cables.
The indicators and switches should be easily
accessible.

2 Vertically place two #6 screws 3-13⁄32

inches apart at the selected place. L eave the
screws out ab ou t an eighth of an inch.

3 Place the upright unit over the screws until

the holes engage and slide the unit down un­til it locks.

Connections

DDS Network Connection

The network
DDS facility
interface is
an RJ-48C
(8-pin) modu­lar jack with the
following
pinout.

RS-232 Port Connection

The RS-232 connector is a standard DB-25 fe­male, configured as a DCE port.

The RS-232 pin assignments are shown below.
Only circuits used by the unit are listed. All un­balanced bipolar inputs and outputs meet RS­232C physical and electrical specifications. The
asynchronous mode is ITU V.22 compliant.

Circuit RS-232

101 1 Frame Ground Gnd
102 7 Signal Ground Gnd
103 2 Transmit Data In
104 3 Receive Data Out
105 4 Request To Send In
106 5 Clear To Send Ou t
107 6 Data Set Ready Out
109 8 Data Carrier Detect Out
114 15 Transmit Clock Out
115 17 Receive Clock Out

Power

Plug the connector from the power supply into
the unit. Plug the transformer into an appropri­ate outlet. This applies power to the unit.

Pin Assignment

1 Network Transmit Out
2 Network Transmit Out
3–6 Not Used
7 Network Data In
8 Network Data In

Signal Function

(Note: All other
pins are open.) DCE

Indicators

Network

This three-color indicator shows the receiver’s
operating status. Green indicates a signal at the
receiver (either customer data or zero suppres­sion). Amber indicat e s signal is present, but re­ceived data is idle or out of service. Red
indicates an insufficient signal for the receiver
to operate properly.

Tx Data

This three-color indicator shows the status of
the transmitted data. Green indicates marks.
Red indicates spaces. Amber indicates alternate
marks and spaces.

Rx Data

This three-color indicator shows the status of
the received data. Green indicates marks. Red

indicates spaces. Amber indicate s al ternate
marks and spaces.

Loop Test

This indicator show the loop status of the unit.
Amber indicates the unit is in loop mode.
When the indicator is Off, the unit is not in
loopback.

Loopbacks

Channel Loop

This loop
is acti­vated by
the reversal of the simplex, 20 mA sealing cur­rent. This is a unidirectional loop that ignores
the DSU transmit data and retransmits the re­ceived DDS data. Receive data is unaffected
and circuit CF is forced Off.

DTE

NET

Data Set Loop (Non-latching)

This loop is activated by the receipt of at least
four consecutive loo p c om m an ds an d r emains
looped as long as each thir d pattern byte is the
loop command. It returns to normal op eration
after at least four pattern bytes that are not the
loop command. This is a unidirectional loop
that retransmits the DSU received data on the
DSU transmit data. Receive data is unaffected
and circuit CF is Off.

DTE

NET

V.54 Channel Loop (Annex B: RDL)

This loop is activated by the receipt of the V.54
loop command. This loop is unidirectional and
returns the DSU receive data to the DSU trans­mit data, and subsequently the DDS transmit
data. Receive data is unaffected.

Configuration

On power up, the unit configures to the hard­ware settings of option switches SW1 and
SW2. Changes to these settings take effect after
resetting the unit by removing and then reap­plying power. The unit then cycles through its
LEDs and reads the new configuration.

These switches provide the following
configuration parameters.

Network Bit Rate Select

Positions SW1-1, SW1-2, and SW1-3 are
used to set the network bit rate. Refer to the ta­ble shown in the upper left of the figure to de­termine the switch settings for a particular bit
rate. R TS-to-CTS delays double when position
SW1-8 is in the B position.

V.54 Loop Operation

Position SW1-4 is used to enable or disable
V.54 loop operation.

Data Polarity

SW1-5 is used to determine whether data bits
are inverted. In the A position, marks equal
pulses. In the B position, spaces equal pulses.
Receipt of OOF, OOS, idle, or loop codes
forces the DSU data to all marks (A position)
or spaces (B position) .

Circuit Assurance

When SW1-6 is in position B, the status of CF
(receive line signal detector) and CA (request
to send) controls the output CB (clear to send).
If either CA or CF is Off, CB is Off. If CA and
CF are On, CB is On.

CTS Control

When SW1-7 is in position B, CTS is forced
On regardless of the RTS input status. In the A
position, the delays are determined by SW1-8.

RTS -t o -C TS Del ay

When SW1-8 is in the A position, the RTS-to-

CTS delay is as shown in the table shown in
the upper left of the figure. In the B position,
the delays double.

Synchronous/Asynchronous Data

When SW2-1 is in the A position, the unit op­erates in Synchronous mode. This switch must
be in position B for switches SW2-2 and SW2-

3 to function. When in position B, the unit op­erates in Asynchronous mode. In Asynchro­nous mode, data functions at 2.4, 4.8, 9.6, 19.2,
and 38.4 kbps.

Asynchronous Word Length

Switches SW2-2 and SW2- 3 are set to match
the number of bits that make in each word of
the asynchronous dat a. Refer to the table
shown in the upper right of the figure.

Signalling Rate Range

Switch SW2-4 is set to match the ranges pro­vided by the service provider.

Not Used

Switches S2-5, S2-6, S2-7, and S2-8 are not
used.

Rate
(kbps)SW1-1SW1-2SW1-3

2.4 B B B 8.0

4.8 A B B 4.0

9.6 B A B 2.0

19.2 A A B 1.0

28.0 B B A 0.8

38.4 A B A 0.5

56.0 B A A 0.4

64.0 A A A 0.3

V.5 4 Lo op

B

A

2

Channel

Enabled

Bit Rate

V. 5 4 D i s a b l ed

* Asynchronous data

does not function at
28, 56, and 64 kbps.

RTS-to-CTS
Delay (ms)

Circuit Assurance On

Data Inverted

Data Normal

CTS Forced On

CTS Normal

Circuit Assurance Off

Bits SW2-2 SW2-3

8A B
9B B
10 A A
11 B A

RTS -t o -C T S D e l a y ×2

Asynchronous Data*

867

25431

Async

Word

Length

Synchronous Dat a

The symbol indicates that the
switch pointed to does not function
unless the oppo sit e e nd of the a rrow

RTS- to -CTS Delay Norma l

is in the po sition s hown. For
example, SW1-8 functions only
when SW1-7 is in the A position.

314

not used

Extended Range

(−2.5 to 2.3%)

5867

not used

Basic Range

(−2.5 to 1.0%)

Warranty

Verilink's product warranty covers repair or re­placement of all equipment under normal use
for a five-year period from date of shipment.
Replacement prod ucts may be new or recondi­tioned. An y replac ed or r epaire d produc t or part
has a ninety (90) day warranty or the remainder
of the initial warranty period, whichever is
longer. Our in-house Repair Center services on
a standard 10-workday-turnaround basis.

Returning Products

A product must be assigned a R e turn Materials
Authorization (RMA) number before it is sent
to Verilink for repair. An RMA number is is­sued by Verilink Customer Service at (800)
926-0085, ext. 2282.

not used

not used

not used

145 Baytech Drive

San Jose, California 95134

not used

not used

not used

Technical As s i s t a n ce Center

127 Jetplex Circle

Madison, Alabama 35 758

[phone]

www.verilink.com

FAX-On- Demand

(800) 957-546 5

[phone]