NEC UNIVERGE NEAX 2000 IPS, Общее описание устройства, Страница: 48 / 191

CHAPTER 2 SYSTEM CONFIGURATION
UNIVERGE NEAX 2000 IPS General Description
Page 44
Issue 5
Remote PIM over IP System Conditions
General Conditions
•
The same version of software must be installed in the MP cards of Main and Remote
Sites.
•
The way of loading and conditions of Key CD are following.
– The same number of Key CD for remote site license as the number of remote
sites is required for Remote PIM over IP system. The required Key CD for the
whole system must be loaded to the Main Site.
– Total number of terminals that can be accommodated in the Remote Site depends
on the number of port and number of license allocated from total Key CD data of
Main Site. The total Key CD data is loaded to Main Site and divided between
Main Site and Remote Sites as following examples.
Example 1: When 256-port Key CD is loaded to the Main Site and 64 ports are
used in the Remote Site. Remote Site: 64 ports are allocated from the Main
Site. Main Site: 192 ports are available
Example 2: When 128-IP license Key CD is loaded to the Main Site. The
license is allocated in order of connecting IP telephone regardless of Main Site
or Remote Site.
– After Key CD data is loaded to the Main Site, the service feature, number of port,
and number of license to be used by each Remote Site are sent to the flash
memory of each Remote Site’s MP card automatically. When Remote Sites
operate with survival mode, this data is used.
– Data to be used by each Remote Site is stored in the flash memory every 10
minutes. When a Remote Site starts operating with survival mode within 10
minutes from starting up, the system does not operate normally because the data
is not stored in flash memory. The system should be observed for more than 10
minutes after starting up.
– The number of legacy terminal that depends on the number of PIM in TDSW
system depends on the number of port in Remote PIM over IP system. For Key
CD data, one PIM license for TDSW system is converted to 64 ports for Remote
PIM over IP system.
•
The number of accommodated terminals/trunks in Main Site and Remote Site should
be a maximum of 1020 ports in the whole system.
•
The TCP/IP network is required between Main Site and Remote Site. The closed and
bandwidth guaranteed network is preferable, such as IP-VPN (Layer 3 VPN) or wide
area Ethernet service (Layer 2 VPN). The following table shows the permissible
delay time in the network.
Permissible delay time Recommended/
Maximum Value
One-way Return-way
Recommended 100 ms. 200 ms.
Maximum Value 120 ms. 240 ms.
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 Site.