System Conditions - NEC UNIVERGE SV9300 Networking Manual

SYSTEM CONDITIONS

General Conditions
• The CPU software versions have to be same in Main Unit and Remote Units.
• For Remote UNIT over IP feature, VoIPDB in each Unit is required.
• The number of accommodated terminals/trunks in Main Unit and Remote Unit should be a maximum
of 2048 ports in the whole system.
• The TCP/IP network is required between Main Unit and Remote Unit. The closed and bandwidth
guaranteed network is preferable, such as IP-VPN (Layer 3 VPN) or wide area Ethernet service (Lay-
er 2 VPN). The following table shows the permissible delay time in the network.
Recommended/
Maximum Value
Recommended Value
Maximum Value
If the network is short of the requirement, it may cause the delay operation of system, the delay and
deterioration of voice packets, disconnection of calls, and frequent changeover to survival mode at
Remote Unit.
• The CPU blade of Remote Unit has the same system data as that of Main Unit, because Remote Unit
automatically gets the data from Main Unit when Remote Unit starts. In normal operation, Main Unit
automatically copies the system data to Remote Unit through the network at the time set by CM43
Y=7 once a day.
• This feature is not compatible with Fusion service of 2400 IPX.
• The RUN LED of Remote Units' CPU blade flash at 60 IPM in normal mode and 120 IPM in survival
mode.
• When the CPU blade/VoIPDB/IP Station is connected to the port of switching HUB that Spanning
Tree (IEEE 802.1d) is enabled, communication failures shown below may occur. Disable the Span-
ning Tree feature to the connection port on the switching HUB.
– IP Station fails to connect to SV9300.
– IP Station cannot communicate with the IP Station.
– IP Station cannot communicate with the SLT/Digital Multiline Terminal.
– Remote Unit cannot change over to the normal mode in the Remote UNIT over IP system.
Also, disable the Spanning Tree feature as for the following connections.
– Connections between Units
– Remote Unit/Dual CPU system/Failover
– IP trunk/SIP trunk
– Application connections such as PCPro/SMDR
Chapter 3 REMOTE UNIT OVER IP FEATURES
Permissible delay time
One-way
100 ms.
120 ms.
3-6
SYSTEM CONDITIONS
Return-way
200 ms.
240 ms.
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