NEC UNIVERGE SV9300 Networking Manual page 329

Conditions for ISDN Alternative Routing in Remote Unit Survival Mode
• This service is available only when the ISDN trunk is accommodated in the unit where this service
is used. Both the Basic Rate Interface (BRI) and the Primary Rate Interface (PRI) can be used.
• This service is available only when the tenant is assigned in each unit.
• When the unit in survival mode returns to normal mode while an ISDN Alternative Routing connec-
tion is established, the call is disconnected.
• The table below shows the operational availability of ISDN Alternative Routing by terminal combi-
nation of originating and terminated side.
Originating Side
Multiline Terminal, SLT
Virtual station (Sub-line origination)
DID trunk
Ring down
DESKCON
ISDN telephone
• This service is available between the Remote Unit and the Main Unit, and between Remote Unit and
Remote Unit.
• There are following conditions to perform this service.
– When a call is originated from a station to a station within own office (VM is included in a station
within own office)
– When a station places a call on hold and originates a call to another station
– When a call terminates from DID trunk to a station
• This service is not available when the destination is a virtual station, a station in another office, a
network station, or with trunk origination via other units.
• This service is available when the destination is trunk termination via other units.
• This service is performed when the unit of the originating station is in survival mode, or when the
unit of the terminated station is in survival mode. Even if the communication between the Main Unit
and the Remote Unit is unavailable, this service is not performed until the mode returns to survival
mode.
• Only the ISDN trunk origination is supported for this service. As transmission methods, route orig-
ination, route advance, and LCR are available.
• Trunk access code must be assigned for each originating tenant by CM64 Y=11. The trunk to be hunt
by the assigned access code specifies trunk in own office.
Terminated Side
Chapter 3 REMOTE UNIT OVER IP FEATURES
Multiline Terminal,
SLT




–
–
3-17
SYSTEM CONDITIONS
: Available –: Not available
DESKCON,
ISDN telephone,
Virtual station
–
–
–
–
–
–
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