NEC Neax 2000 Ivs2 Wcs System Manual

CHAPTER 1 GENERAL INFORMATION
Outline of Multi-Site Roaming
NEAX2000 IVS2WCSSystemManual(PCS)
ND-70920 (E), Issue 1.0Page 13
Wo r d D e f i n i t i o n
Virtual LC: Virtual LC exists only on the system data, provided via non-hardware
supported LENs. The Virtual LC must be assigned by the system data
programming for operating Home PSs and Visitor PSs used for Multi-
Site Roaming, together with the Virtual TRK.
Virtual TRK: Virtual TRK (trunk) exists only on the system data, provided via non-
hardware...

NEAX2000 IVS2WCS System Manual (PCS)Page 14ND-70920 (E), Issue 1.0
CHAPTER 1 GENERAL INFORMATION
Outline of Multi-Site Roaming
HLR: Home Location Register. A database to store the location registration
data of the Home PS.
VLR: Visitor Location Register. A database to store the location registration
data of the Visitor PS temporarily, when theVisitor PS is in the zone of
another PBX.
System Operation Summary
 PS Location Registration
(1) In the zone of the Visitor PBX, the Visitor PS requests the...

CHAPTER 1 GENERAL INFORMATION
Outline of Multi-Site Roaming
NEAX2000 IVS2WCSSystemManual(PCS)
ND-70920 (E), Issue 1.0Page 15
Figure 1-5 Location Registration
VLR
VISITOR PBX
HLR
(2) Interpreting Home PBX
(3) Profiles inquiry
VISITOR
PS
(5) Sending profiles
(7) Registration to VLR
HOME PBX
(4) Analyze the inquir y
Q931a Digital Line
(1)
R
eque
st
in
g
loc
at
io
n
reg
is
tr
at
io
n
(9) Registration to HLR(8)
Notification completion of registration
(6) Confirming profiles 

NEAX2000 IVS2WCS System Manual (PCS)Page 16ND-70920 (E), Issue 1.0
CHAPTER 1 GENERAL INFORMATION
Outline of Multi-Site Roaming
 Call Termination to Visitor PS
(1) The Home PBX receives the call from another PBX and sends to a Home PS.
(2) The Home PBX refers the HLR information of the PS.
(3) From the Roaming number contained in the HLR information, the Home PBX detects
whether the Home PS is roaming.
(4) The Home PBX inquires of the Visitor PBX about the call termination to the Visitor PS.
The inquiry...

CHAPTER 1 GENERAL INFORMATION
Outline of Multi-Site Roaming
NEAX2000 IVS2WCSSystemManual(PCS)
ND-70920 (E), Issue 1.0Page 17
Service Conditions
(1) Trunk
 Multi-Site Roaming can be executed only on trunk connection between PBXs based on JT-
Q931a protocol.
 To each trunk route of JT-Q931a trunks, it can be specified whether Multi-Site Roaming is
provided or not.
 The JT-Q931a trunks can be used by single line telephone stations and D
termstations for
originating or receiving calls in the same manner...

NEAX2000 IVS2WCS System Manual (PCS)Page 18ND-70920 (E), Issue 1.0
This page is for your notes. 

NEAX2000 IVS2WCSSystemManual(PCS)
ND-70920 (E), Issue 1.0Page 19
CHAPTER 2
INSTALLATION
This chapter explains the hardware installation procedure to provide
WCS interface to the PBX. 

NEAX2000 IVS2WCS System Manual (PCS)Page 20ND-70920 (E), Issue 1.0
CHAPTER 2 INSTALLATION
Precautions
PRECAUTIONS
Static Electricity Guard
You must wear a grounded wrist strap to protect circuit cards from static electricity.
Figure 2-1 Static Electricity Guard (1 of 2)
WHEN PLUGGING/UNPLUGGING A CIRCUIT CARD
WHEN
HOLDING A CIRCUIT CARD
PBX
WRIST STRAP
FRAME GROUND SCREW
CARD FRONT
NEVER TOUCH THE COMPONENTS OR
SOLDERED SURFACE WITH BARE HANDS. 

CHAPTER 2 INSTALLATION
Precautions
NEAX2000 IVS2WCSSystemManual(PCS)
ND-70920 (E), Issue 1.0Page 21
Figure 2-1 Static Electricity Guard (2 of 2)
 WHEN MAKING A SWITCH SETTING ON A CIRCUIT CARD
 WHEN CARRYING A CIRCUIT CARD
The mark shown below is attached to the sheet for the work in which circuit cards are handled.
When engaging in such work, the installer must be careful not to cause damage by static
electricity.
WEAR A WRIST STRAP AND PERFORM
THE WORK ON A GROUNDED
CONDUCTIVE WORK SURFACE.
CIRCUIT...

NEAX2000 IVS2WCS System Manual (PCS)Page 22ND-70920 (E), Issue 1.0
CHAPTER 2 INSTALLATION
Precautions
CAUTION
You must hold the edge of a circuit card when plugging or unplugging the circuit card. If you
touch another area, you may be exposed to hazardous voltages.
CARD FRONT
NEVER TOUCH THE COMPONENTS OR
SOLDERED SURFACE WITH BARE HANDS.
PBX