User manual

CHAPTER 2 SYSTEM CONFIGURATION
NEAX 2000 IPS General Description Page 41
NDA-24345, Issue 3
Remote PIM over IP System Conditions
General Conditions
• We recommend that you should install the same version of software in the MP cards of Main
Site and Remote Sites.
• The way of loading and conditions of Key FD are following.
– The same number of Key FD for remote site license as the number of remote sites is
required for Remote PIM over IP system.
– The required Key FD for the whole system must be loaded to the Main Site. If the Key
FD is loaded to the Remote Site, the Key FD data is invalid.
– 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 FD data of Main Site. The
total Key FD data is loaded to Main Site and divided between Main Site and Remote
Sites as following examples.
Example 1: When 256-port Key FD 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 FD is loaded to the Main Site
The license is allocated in order of connecting IP telephone regardless of Main Site or
Remote Site.
– When the number of port and number of license of Key FD data are insufficient, it causes
the FP operation failure or the IP telephone connection failure.
– After Key FD 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 FD 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.