DDA-4320 & ZDA-4320RH Instruction Book
Revision 7
www.irtelectronics.com
Page 8 of 16
4320-DDA_ib_Rev7.doc
Configuration
Switch Settings:
Input signal type (rate set)
SW3-1
SW3-2
SW3-3
SNMP Setting
OFF
OFF
X (OFF or ON)
STM-1 (155Mb/s) CMI encoded
ON
OFF
OFF
STM-1 (155Mb/s) NRZ
5
OFF
ON
OFF
270Mb/s
6
ON
ON
OFF
ASI
ON
OFF
ON
SDI
OFF
ON
ON
ASI/SDI
ON
ON
ON
SW3-4
ON Reduced
7
cable equalisation, ≈ 200m;
OFF Normal cable equalisation, > 250m.
SW3-5
ON Enable output AIS
8
on loss of signal, for STM-1 only;
OFF Disable output AIS
8
on loss of signal, for STM-1 only.
SW3-6
ON Enable changeover on AIS
8
;
OFF Disable changeover on AIS
8
.
SW3-7
ON Disable major and minor SNMP alarms to the frame Agent (CDM card)
9
;
OFF Enable major and minor SNMP alarms to the frame Agent (CDM card)
9
.
NOTE:
5
For optical transmission, the STM-1 signal presents an NRZ format, without the CMI encoding
used in electrical transmission. In this instance it is not an actual optical interface, but an
electrical signal that can be fed into an electrical to optical converter to create a true optical
STM-1 signal.
6
270Mb/s setting includes ASI, SDI or any other 270Mb/s type of signal conforming to the
specified input level parameters, whereas ASI/SDI setting is only for ASI or SDI type of signals.
7
For use with shorter cable runs or use in a noisy environment.
8
AIS stands for Alarm Indication Signal and is defined as all 1’s in the data stream.
9
When using TRAPS via SNMP, depending on how system is set up, in order to avoid double
reporting of alarms via the DDA-4320 card itself and the CDM card (SNMP Agent) of the
frame, major and minor SNMP alarms that are reported to the CDM card of the frame can be
disabled.