NEC UNIVERGE SV9300 Networking Manual page 321

Conditions for Survival Mode at Remote Unit
• Remote Unit starts survival mode operation in the following cases.
a. When the communications (Keep Alive signal) in every 30 seconds between Main Unit and Re-
mote Unit are interrupted for the predetermined time set by CM0B Y=1XX>80 on normal mode
operation.
b. When Remote Unit cannot be connected to Main Unit or is not allowed to connect to Main Unit
after the system reset of the Remote Unit.
• Remote Unit is reset automatically to change the operation from normal mode to survival mode when
it detects an interruption of the communications from/to Main Unit.
• When Remote Unit starts the survival mode operation, the fault information "System reset" (Fault
occurrence kind No. 001) is registered to the CPU blade of Remote Unit. In addition, "Communica-
tion error occurrence between Main Unit and Remote Unit" (Fault occurrence kind No. 042) is reg-
istered to the CPU blade of Main Unit at 20 seconds later from the predetermined time set by CM0B
Y=1XX>80.
• Remote Unit on survival mode checks at every 30 seconds if the communications to Main Unit are
possible. When the Remote Unit regards that the communications are possible, "Communication er-
ror restoration between Main Unit and Remote Unit" (Fault occurrence kind No. 052) is registered
to the CPU blade of Main Unit at 20 seconds later from the predetermined time set by CM0B
Y=1XX>81.
• When Remote Unit on survival mode regards that the communications to Main Unit are possible,
manual changeover (system reset) is required. Automatic changeover (re-connection to Main Unit)
is also selectable in system data programming (CM0B Y=1XX>81, 83). At the automatic change-
over, Remote Unit system is initialized and the calls on going are disconnected due to the reset of
terminals.
• During survival mode operation, it is not possible to originate/terminate calls to/from stations at other
units.
• When PCPro is connected to Unit02-50 during a survival mode, by entering the system data (CMFA
Y=05) on the System Data mode of PCPro, you can read only the information of IP Station logged
in to the Unit. When PCPro is connected to Unit02-50 during a normal mode, the information for IP
Station cannot be read ("CM CODE NOT ALLOWED" is displayed when you enter the first data).
* The reading connecting Unit No. for IP Station is available only for IP Multiline Terminal/DT700/
DT800 Series/Standard SIP station/D
Chapter 3 REMOTE UNIT OVER IP FEATURES
term
SP30/SP350/MH240.
3-9
SYSTEM CONDITIONS
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