Chapter 5. Configuration Menu
44
ESU LT User Manual
61200410L1-1B
Line Code
Selects either Alternate Mark Inversion (
AMI
) or High
Density Bipolar Order 3 (
HDB3
) line coding.
AMI
provides a
12.5% minimum ones pulse density and alternates signal
polarity of transmitted ones from positive to negative.
HDB3
is an extension of
AMI
that inserts a bipolar violation (signal
of the wrong polarity) whenever there are 4 or more
transmitted zeros.
Choices:
HDB3
;
AMI
CRC-4
When enabled, the CRC-4 checksum bits are transmitted in
the outgoing E1 data stream. Also the received signal is
checked for errors. CRC-4 can be enabled in both CCS and
CAS modes. A CRC-4 checksum cannot be sent in unframed
mode.
Choices:
E
NABLE
;
D
ISABLE
NFAS Word
If enabled, the network interface receiver requires the NFAS
word (time slot 0 in odd frames) and the FAS word
(time slot 0 in even frames) for frame sync. When disabled,
only the FAS word is needed for frame sync.
Choices:
E
NABLE
;
D
ISABLE
RFA Gen
When enabled, remote frame alarm is transmitted toward the
network during alarm.
Choices:
E
NABLE
;
D
ISABLE
Timing Mode
Selects the clock source for transmission toward the network
from the NI.
Choices:
N
ETWORK
;
I
NTERNAL
;
DTE
The clocking option selected always designates the clock source for
transmission. Clocking necessary for receiving data is always re-
covered from incoming data.
Содержание 1200410L1
Страница 1: ...ESU LT User Manual Part Number 1200410L1 61200410L1 1B February 2003 ...
Страница 12: ...Table of Contents 12 ESU LT User Manual 61200410L1 1B ...
Страница 14: ...List of Figures 14 ESU LT User Manual 61200410L1 1B ...
Страница 16: ...List of Tables 16 ESU LT User Manual 61200410L1 1B ...
Страница 20: ...Chapter 1 Introduction 20 ESU LT User Manual 61200410L1 1B ...
Страница 28: ...Chapter 2 Installation 28 ESU LT User Manual 61200410L1 1B ...
Страница 34: ...Chapter 3 Operation 34 ESU LT User Manual 61200410L1 1B ...
Страница 40: ...Chapter 4 Status Menu 40 ESU LT User Manual 61200410L1 1B ...
Страница 64: ...Chapter 7 Test Menu 64 ESU LT User Manual 61200410L1 1B ...
Страница 79: ...Index 61200410L1 1B ESU LT User Manual 79 W wiring 69 ...
Страница 80: ...Index 80 ESU LT User Manual 61200410L1 1B ...