Videoswitch VDM - Manual (Page 54)

Videoswitch
VDM Digital Recorder
Vdm601t.doc
46
• MSN - The Multiple Subscriber Numbering option ensures that the incoming call is only answered if
it is of the correct type (i.e. V120) and the last digits of the called number match the “ISDN
MSN/Sub-Address” (section 10.4.7.4.8).
10.4.7.4.8 ISDN MSN/Sub-Address
Up to three digits may be entered using the Camera 1.16 keys to specify either the Sub-Address or MSN
number as described above. Press
DEFAULT
key clear this setting.
10.4.7.4.9 RS232 Baud Rate
Select the RS232 baud rate as required. The standard rate for the VDM-Remote software is 9600. If a
modem or ISDN module is selected in 10.4.7.2, the baud rate is automatically selected and this setting is not
used (in revision VDM001E9 this option should be set to 57K when a modem is used).
10.4.7.5 Keyboard/Clock Synchronisation
The RS485 connector on the VDM may be used for a remote keyboard. It may also be used to synchronise
the clocks of two or more VDMs.
The options are:
•
Keyboard Disabled No keyboard or clock synchronisation is being used.
• Enable Keyboard/Clock Slave
Keyboard or clock synchronisation is being used.
• Enable Keyboard/Clock Master
Keyboard or clock synchronisation is being used.
If two or more VDMs are being used on the same site, it may be desirable to synchronise their clocks so that
the recorded images from each units have exactly corresponding times and dates (within 1 second).
• To achieve this, set one VDM as a “Master” by setting the menu option to “Enable Keyboard/Clock
Master”. Set the others as “Slaves” by setting their menu option to “Enable Keyboard/Clock Slave”.
• Connect the RS485 “+” and “-“ outputs of the master VDM to the RS485 “+” and “-“ inputs of the first
“Slave” VDM.
• Connect the RS485 “+” and “-“ output of the first “Slave” VDM to the RS485 “+” and “-“ inputs of the
second “Slave” VDM.
• Daisy-chain other slave VDMs in the same manner.
• The clocks of the units will now been synchronised each minute to the “Master”.
• If a remote keyboard is being used, connect it to the “Master” VDM that has been chosen as the
Master.
• All units should have their RS485 inputs terminated using the miniature slide switch on the VDM rear
panel.
• Older VDMs with no terminating switch may be terminated either by using the link on the T25
terminal adaptor PCB, the switch on the T25A terminal adaptor PCB connecting pins 4 and 14
together on the 25-way Alarm/Keyboard Connector of the VDM.
10.4.8 Configurations
10.4.8.1 Restore Factory Configuration
This option restores all setting the factory defaults. This is recommended after a major firmware upgrade.
10.4.8.2 Get Configuration from CD
All incident CD recordings also save the configuration. The stored configuration may be restored using this
option, but only if there has not been a firmware upgrade since the recording was made, otherwise changes
and additions to the menu structure may have occurred.
10.4.8.3 Erase Hard Drives
10.4.8.3.1 Erase Hard Drive 1
Erase all image indexes on hard drive 1 (lower). The hard drive will appear blank in the drive information
screen.