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C
HAPTER
3: O
PERATING A MULTI
-
ROLE RECORDER
19
N
OTE
: Currently, network recorders do not support the TRIM command and it is no longer required on
DRE/SSD/003 and later models.
Using media space effectively
For information on the files created and space management, see “File formats and management” on page 24 .
Recording data
This section describes methods for controlling recording, using the wraparound function, and recording events. It
also discusses time sources and the remaining recording time.
Controlling data recording
There are three methods of controlling data recording on a multi-role recorder:
• Remotely over a network using SNMP (see “Network remote control” on page 19 ).
• By external signals through the 19-pin I/O interface (see “I/O remote control (19-way I/O connector)” on
page 19 ).
• Locally from the front panel (see “Local control using the front panel” on page 20 ).
Use the controlMethod SNMP variable to configure the multi-role recorder for remote, external, or local operation.
For information on selecting the control method via SNMP, see
TEC/NOT/058 - Overview of SNMP and using third
party SNMP tools
.
N
OTE
: The multi-role recorder responds only to the control method selected. For example, if the control method
selected is remote, then all other control methods are disabled.
After a power outage, the multi-role recorder starts up in its previously configured state.
Network remote control
Multi-role recorders allow for START/STOP and EVENT functions to be controlled through a network using SNMP.
To use this function, the multi-role recorder must be configured for network remote operation by setting
controlMethod to network (1). When configured for network remote operation, the multi-role recorder display
shows Remote as illustrated in the following figure.
Figure 10: Multi-role recorder configured for network remote operation
I/O remote control (19-way I/O connector)
Some multi-role recorders allow for START/STOP and EVENT functions to be controlled remotely through the 19-
way I/O connector. To check whether remote operation is supported, see the respective multi-role recorder data
sheet. These controls are triggered by setting controlMethod to external (2) and shorting specific pins on the
multi-role recorder’s 19-pin connector, by means of a cable and switch connected to a multi-role recorder. When
configured for I/O remote operation, the multi-role recorder display shows ExtCtrl as illustrated in the following
figure.
Figure 11: Multi-role recorder configured for cable remote operation
Remote 09:10:48
N000 Stopped
ExtCtrl 14:10:48
N000 Stopped