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 supported LENs. The Virtual TRK must be assigned by the
system data programming for operating Home PSs and Visitor PSs used
for Multi-Site Roaming, together with the Virtual LC.
Individual PS number: Individual PS number is assigned to a PS to identify the PS on the
Roaming network. It must be an unique number in the network.
Network ID method: Network ID method is one method to operate Multi-Site Roaming. A
Roaming PS must have two SYS-ID on the Network ID method. One is
main SYS-ID for Home PBX, and another is Network ID for Roaming
network. The Network ID is used to define whether the PS can operate
under the control of PBXs on the Roaming network. The Network ID
must be the same for all PBXs within the same network.
Visitor PBX: When a PS leaves control of a PBX to which it belongs originally, and is
operating in a zone of another PBX, the PBX is called Visitor PBX.
Visitor PS: When a PS leaves control of a PBX to which it belongs originally, and is
operating in a zone of another PBX, the PS is called Visitor PS.
Home PBX: Home PBX is a PBX to which a PS ordinarily belongs.
Home PBX ID: Home PBX ID is a unique number to identify the PBX on the Roaming
network.
Home PS: When a PS operates under control of a PBX to which the PS originally
belongs, the PS is called Home PS.
Roaming number: Roaming number is assigned to a Visitor PS temporarily, when the PS
is roaming to a Visitor PBX. The actual Roaming number is Virtual LC
station number assigned as a pilot station of Station Hunting group on
the Visitor PBX. 
						

							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 Visitor PBX for location
registration of its own.
(2) The Visitor PBX analyzes the number sent from the Visitor PS and detects the Home
PBX of Visitor PS.
(3) The Visitor PBX inquires of the Home PBX about the profiles; various data which is
assigned to the PS for the operation as a Visitor PS.
(4) The Home PBX analyzes the number included with the inquiry and detects whether the
Visitor PS is one of the Home PS of its own.
If the Visitor PS is detected as a PS which belongs to another PBX, the PBX forwards
the inquiry to the corresponding route.
(5) If the Visitor PS is detected as a Home PS, the Home PBX sends the Visitor PS profiles
to the Visitor PBX.
(6) The Visitor PBX confirms the profiles sent from the Home PBX, and determines the
Roaming number for the Visitor PS.
The actual Roaming number is Virtual LC station number assigned as a pilot station of
Station Hunting Group on the Visitor PBX.
(7) The Visitor PBX registers the profile data of the Visitor PS to the VLR.
(8) Then notifies the completion of registration to the Home PBX. The notification contains
the Roaming number determined.
(9) The Home PBX receives the notification and stores the Roaming number to the HLR. 
						

							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 contains the roaming data of the Visitor PS, such as Roaming number and
Individual PS number.
(5) he Visitor PBX analyzes the Roaming number and refers to the VLR information of the
Visitor PS in accordance with the Individual PS number.
(6) The Visitor PBX confirms the VLR information.
(7) The Visitor PBX terminates the call to the Visitor PS.
Figure 1-6 Call Termination
VLR
VISITOR PBX
HLR(4) Call termination inquir y
(5) Referring VLR
HOME PBX
Q931a Digital Line
(7) Call Termination
(2) Referring HLR
(
1)
C
a
ll
fr
om
a
no
t
he
r
PB
X
(3) Interpreting the
location of the PS(6) Confirming VLR
VISITOR
PS 
						

							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 as common trunks.
(2) Data Base Module
 The Data Base Module (DBM) card (PN-AP00-A) is required per PBX.
 The DBM card cannot be used as billing application processor (for SMDR, MCI, PMS, or
Hotel printer).
 System data stored in the memory of the DBM card can be saved, loaded, and verified from
a MAT. (Memory Area No.:A, Memory Address: 00900-10870, File Extension: DMA)
 A Roaming network consists of maximum 512 PBXs.
 Visitor Location Register (VLR) information for maximum 512 Visitor PSs can be recorded
to a system.
VLR information is the various information of Visitor PS and is made in the memory of DBM
on the Visitor PBX when the PS is roaming.
When the VLR information exceeds for more than 512 PSs, DBM overwrites the oldest VLR
information.
(3) Home PS/Visitor PS
To use the PSs for Multi-Site Roaming, the following items must be assigned to the PSs:
- SYS-ID; SYS-ID of Home PBX.
- PS-ID; A unique number for identifying the PS.
- Individual PS number; The same number with the Home PBX ID.
- Extension number; The same number with the Individual PS number.
- Network ID; It must be assigned when the Roaming networkadopts Network ID methods.
- Home PBX ID; A unique number for identifying the PBX on the Roaming network. 
						

							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
CARD
WHEN CARRYING A CIRCUIT
CARD AROUND, KEEP THE
CARD IN A CONDUCTIVE
POLYETHYLENE BAG.
CIRCUIT
CARDCONDUCTIVE
POLYETHYLENE
BAG
AT T E N T I O N
Contents
Static Sensitive
Handling
Precautions Required 
						

							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