Testing

ICX-250 Diagnostics

53

The bold highlighted selected under “Options” is the Factory Setting.

Function

Switch

Switch

Options

Description

Location

 

 

 

 

 

 

 

 

 

T1 INTERFACE:

T1 Interface

T1 Loopback

Front (slide)

Network

Network: Loops signal back to the net-

T1 Loopback

 

 

Local

work and breaks the transmit and receive

(see page 54)

 

 

Off

paths between the Framer and LIU and

 

 

 

 

loops T1 receive onto the T1 transmit

 

 

 

 

within the Framer chip.

 

 

 

 

Local: Loops signal back to the network

 

 

 

 

and breaks the transmit and receive paths

 

 

 

 

between the LIU and the line and loops

 

 

 

 

the T1 transmit signal onto the T1 receive

 

 

 

 

within the LIU.

 

 

 

 

 

T1 Test

QRSS

Front (slide)

On

On: All connections between either Data

Pattern

Quasi Random Signal

 

Off

Ports or the FXS Ports and the T1 inter-

QRSS

Source. Used for

 

 

face are broken and a QRSS pattern is

(see page 56)

diagnostic capabilities

 

 

transmitted onto the T1 interface. At this

 

for analog, remote and

 

 

time the T1 Test Pattern LED will light

 

dual loopbacks as well

 

 

when QRSS is being transmitted.

 

as remote test.

 

 

Note: ONLY works with framed T1.

 

 

 

 

 

DATA PORTS:

 

 

 

 

 

 

 

 

Loopback

Data Port 1 and 2

Front (slide)

Local

Local: Breaks the receive signal on the

(see page 58)

Loopback

 

Network

network side between the Data Port 1 or 2

 

 

 

Off

and the T1 interface and loops the Data

 

 

 

 

Port 1 or 2 transmit signal onto the

 

 

 

 

receive side.

 

 

 

 

Network: Breaks the transmit signal on

 

 

 

 

the network side between the Data Port 1

 

 

 

 

or 2 and the T1 interface and loops the

 

 

 

 

Data Port 1 or 2 receive signal onto the

 

 

 

 

transmit side.

 

 

 

 

 

Test Pattern

1 / Off / 2

Front (slide)

1: Test Port 1

1: Breaks the transmit and receive paths

(see page 60)

 

 

2: Test Port 2

between the Data Port 1 line and the

 

 

 

OFF: no Test

receiver and inserts the 2047 pattern onto

 

 

 

 

the transmit path. Also turns on the 2047

 

 

 

 

receiver.

 

 

 

 

2: Breaks the transmit and receive paths

 

 

 

 

between the Data Port 2 line and the

 

 

 

 

receiver and inserts the 2047 pattern onto

 

 

 

 

the transmit path. Also turns on the 2047

 

 

 

 

receiver.

 

 

 

 

OFF: 2047 function is disabled.

 

 

 

 

 

Issue 1, September 1998

ADCP-62-023

© 1998, ADC Telecommunications, Inc.