NEC Neax 2000 Ivs2 Isdn System Manual

							 NEAX2000 IVS2 ISDN System ManualPage 10  ND-70919 (E), Issue 1.0
CHAPTER 1  GENERAL INFORMATION
System Outline
DTI
The Digital Trunk Interface (DTI) interfaces the PBX directly to 24/30-channel PCM transmission
line. The DTI has the following functions:
For 24DTI:
 Unipolar/Bipolar Conversion (AMI Format/B8ZS Format)
 Alarm Detection/Insertion
 Digital PAD on Voice Signal Transmission
 Loop-Back Test (Local/Remote Loop Back)
 Cyclic Redundancy Checking (based on ITU-T Rec. G704)
For 30DTI:
 Unipolar/Bipolar Conversion (HDB3 Format)
 Alarm Detection/Insertion
 Digital PAD on Voice Signal Transmission
 Cyclic Redundancy Checking (based on ITU-T Rec. G704)
For connections of a 24DTI and transmission line, twisted-pair cable can be used. For connection
of a 30DTI and transmission line, either coaxial cable or twisted-pair cable can be used.
DCH
The D Channel Handler (DCH) provides the D Channel signalling interface through the DTI to an
ISDN exchange, and it is responsible for signaling between the PBX and the ISDN exchange
under control of the system MP.
PRT
The Primary Rate Interface Trunk (PRT) provides the ISDN Primary Rate Interface (1.5 Mbps
PCM-23B + D) and a built-in DCH. The PRT has the following functions:
 Unipolar/Bipolar Conversion (AMI Format/B8ZS Format)
 Alarm Detection/Insertion
 Digital PAD on Voice Signal Transmission
 Loop-Back Test (Local/Remote Loop Back)
 Cyclic Redundancy Checking (based on ITU-T Rec. G704)
For connections of PRT and transmission line, twisted-pair cable can be used.
NOTE:ISDN requires B8ZS line coding with Extended Superframing (ESF) Format. 
						

							CHAPTER 1  GENERAL INFORMATION
System Outline
NEAX2000 IVS2 ISDN System Manual    
ND-70919 (E), Issue 1.0   Page 11
BRT
The Basic Rate Interface Trunk (BRT) provides one or two physical interface to the ISDN-Basic
Rate Interface service (144 Kbps PCM-2B + D).
The BRT has the following functions:
 Unipolar/Bipolar Conversion (AMI Format) (S/T Interface) / B8ZS
 Signaling Insertion/Extraction
 Frame Synchronization
 Digital PAD on Voice Signal Transmission
For connections of BRT and transmission line, twisted-pair cables can be used. 
						

							 NEAX2000 IVS2 ISDN System ManualPage 12  ND-70919 (E), Issue 1.0
CHAPTER 1  GENERAL INFORMATION
System Outline
PLO
The Phase Locked Oscillator (PLO) equipped on the MP card synchronizes the system to an
ISDN clock.
The PLO generates the clock signals according to the source clocks received from network. The
source clock signals are extracted at DTI/BRT/PRT cards and supplied to the PLO. Two clock
routes are available; one is Route 0 that receives clock signals from DTI0/BRT0/PRT0, and the
other is a standby Route 1 (DTI1/BRT1/PRT1) that receives clock signals when no clock signals
appear on Route 0. When no clock signals come from either Route 0 or Route 1, the PLO keeps
generating the clock signals at the frequency of the last source clock. The PLO can receive
different frequencies of source clocks from Route 0 and Route 1.
Figure 1-6 shows an example of clock supply route.
Figure 1-6  Clock Supply Route
PBX
TDSW
DTI1/BRT1
PLOISDN
: CLOCK SIGNAL SUPPLY ROUTE 0
: CLOCK SIGNAL SUPPLY ROUTE 1
NOTE:DTI0/BRT0/PRT0 and DTI1/BRT1/PRT1 must be mounted in PIM0.
/PRT1
DTI0/BRT0
/PRT0NOTE 
						

							CHAPTER 1  GENERAL INFORMATION
System Outline
NEAX2000 IVS2 ISDN System Manual    
ND-70919 (E), Issue 1.0   Page 13
ICH
The ISDN Channel Handler (ICH) provides the D channel signaling interface and controls an ILC
(Layers 2 and 3).
ILC
The ISDN Line Circuit (ILC) provides a physical interface to the ISDN Terminal. The interface
provides for a maximum of two line circuits. 
						

							 NEAX2000 IVS2 ISDN System ManualPage 14  ND-70919 (E), Issue 1.0
CHAPTER 1  GENERAL INFORMATION
Outline of Event Based CCIS
OUTLINE OF EVENT BASED CCIS
Event Based CCIS allows a PBX customer who does not have tie lines to use the various
Common Channel Interoffice Signaling (CCIS) feature by using ISDN lines as CCIS virtual tie
lines. For the PBX customer who usually has low traffic, Event Based CCIS is available between
NEC NEAX PBXs.
Figure 1-7 shows the system outline of Event Based CCIS.
Figure 1-7  System Outline of Event Based CCIS
LC/TRKCCH NEC PBXLC/TRK CCH ISDN NETWORK EVENT BASED CCIS CONNECTION
LC/TRKCCH DTI/BRT PBXLC/TRK CCH ISDN NETWORK REGULAR ISDN CONNECTION
PBX
NEC PBX /PRTDTI/BRT
/PRT
DTI/BRT
/PRTDTI/BRT
/PRT 
						

							CHAPTER 1  GENERAL INFORMATION
Outline of Event Based CCIS
NEAX2000 IVS2 ISDN System Manual    
ND-70919 (E), Issue 1.0   Page 15
Common Channel and Voice Channel Link Control
When the call is a regular ISDN call or when there is no call on the PBX, the common signaling
channel and the voice channel for the virtual tie lines are disconnected.
If the virtual tie lines are all busy or when the virtual tie lines  cannot be connected due to a line
fault, a call is transmitted to the opposite office via ISDN network as a regular ISDN call, not as
a CCIS call.
When a predetermined time passes after all calls finish, the voice channels and common
signaling channel are released and the CCIS link is disconnected. The release timer is set by
system data programming for the common signaling channel and voice channels.
Figure 1-8  Release Timing of Virtual Tie Line and CCIS Link
Release VT (B1)
Release VT (B3)
Release VT (B2)
Release CCIS (B3)
Release CCIS (B2)Set VT (B3)
Set VT (B1) Voice ch 1 (B2)
Voice ch 2 (B3)
CCIS link (B1)
n sec.
n sec.
m sec.
Set VT (B2)
n, m: Release timer
2.4 seconds-max. 28 minutes
VT: Virtual Tie Line 
						

							 NEAX2000 IVS2 ISDN System ManualPage 16  ND-70919 (E), Issue 1.0
CHAPTER 1  GENERAL INFORMATION
Outline of Event Based CCIS
For Event Based CCIS, the virtual trunks are used as a No. 7 CCIS trunk.
Vir tual Trunk:
The virtual trunk consists of a Home-Side Trunk and a Mate-Side Trunk. The Home-Side 
Trunk is connected to the station side, and the Mate-Side Trunk is connected to the network 
side of the PBX virtually.
The virtual trunks do not exist actually, but are handled as a No. 7 CCIS trunk by the system, 
for system data. ISDN subaddress or ISDN indial number is used to notify the CCIS channel 
number for virtual tie line and establish a CCIS link and individual voice links between 
offices.
Figure 1-9  Virtual Trunk
CCH Card:
The CCH card is used to handle the common channel signaling.
DTI/BRT/PRT Card:
The system uses the same interface trunk for regular ISDN connection and the virtual tie 
line connection on Event Based CCIS.
ISDN Protocol Analyzer:
For ISDN PRI, the protocol analyzer must be able to support ISDN exchange, such as AT&T, 
Nortel. For North America, it must support National ISDN 2 (NI-2) protocols.
For ISDN BRI, the protocol analyzer must be an S/T interface. For North America, it must 
suppor t National ISDN 1 (NI-1) protocol.
Both analyzers must be capable of collecting Layer 2 and Layer 3 (Q921 & Q931) 
information.
TDSW
DTI/BRT/PRT
LC/TRKISDN
MATE-SIDE
HOME-SIDEVIRTUAL
TRUNK 
						

							CHAPTER 1  GENERAL INFORMATION
Outline of Event Based CCIS
NEAX2000 IVS2 ISDN System Manual    
ND-70919 (E), Issue 1.0   Page 17
Event Based CCIS Feature List
Table 1-1  Event Based CCIS Feature List 
: Available
: Not available
SERVICE FEATURE AVAILABILITY REMARKS
Attendant Camp-On with Tone Indication-CCIS X
Attendant Controlled Conference-CCIS XNOTE 4
Brokerage-Hot-Line-CCIS X
Busy Verification-CCIS X
Call Back-CCIS X
Call Forwarding-All Calls-CCIS X
Call Forwarding-Busy Line-CCIS X
Call Forwarding-Don’t Answer-CCIS X
Call Forwarding-Intercept-CCIS X
Call Forwarding-Override-CCIS X
Calling Name Display-CCIS X
Calling Number Display-CCIS X
Call Transfer-All Calls-CCIS X
Call Transfer-Attendant-CCIS X
Centralized Billing-CCIS XNOTE 2
Centralized Day/Night Mode Change-CCIS –
Consultation Hold-All Calls-CCIS X
Deluxe Traveling Class Mark-CCIS X
Dial Access to Attendant-CCIS X
Direct-in Termination-CCIS X
Distinctive Ringing-CCIS X
Do Not Disturb-CCIS X
Dual Hold-CCIS X
Elapsed Time Display-CCIS X
Flexible Numbering of Station-CCIS X
X
– 
						

							 NEAX2000 IVS2 ISDN System ManualPage 18  ND-70919 (E), Issue 1.0
CHAPTER 1  GENERAL INFORMATION
Outline of Event Based CCIS
Hands-Free-Answer Back-CCIS X
House-Phone-CCIS X
Hot Line-CCIS X
Incoming Call Identification-CCIS X
Individual Attendant Access-CCIS XNOTE 5
LDN Night Connection-CCIS X
Link Alarm Display-CCIS –
Message Waiting Lamp Setting-Attendant-CCIS XNOTE 3
Message Waiting Lamp Setting-Station-CCIS XNOTE 3
Miscellaneous Trunk Access-CCIS X
Miscellaneous Trunk Restriction-CCIS X
Multiple Call Forwarding-All Calls-CCIS X
Multiple Call Forwarding-Busy Line-CCIS X
Multiple Call Forwarding-Don’t Answer-CCIS X
Night Connection Fixed-CCIS X
Night Connection Flexible-CCIS X
Outgoing Trunk Queuing-CCIS –
Paging Access-CCIS X
Restriction from Outgoing Calls-CCIS X
Single Digit Station Calling-CCIS X
Station Controlled Conference-CCIS XNOTE 4
Station to Station Calling-CCIS X
Station to Station Calling-Operator Assistance-CCIS X
Toll Restriction-3/6 Digit-CCIS X
Trunk Answer from Any Station-CCIS X
Trunk to Trunk Restriction-CCIS X
Table 1-1  Event Based CCIS Feature List (Continued)
: Available
: Not available
SERVICE FEATURE AVAILABILITY REMARKS
X
– 
						

							CHAPTER 1  GENERAL INFORMATION
Outline of Event Based CCIS
NEAX2000 IVS2 ISDN System Manual    
ND-70919 (E), Issue 1.0   Page 19
NOTE 1:The voice channel and the common signaling channel keep connecting after the calls
finish according to the release timer data. Therefore, while the CCIS link is kept up by
the timer, the features are available.
NOTE 2:The billing information is sent while the CCH link is connected. If the sending of billing
information has failed, it is sent again when a new CCH link is established by the next
call.
NOTE 3:As a remote office, this feature is available on NEAX2000 IVS
2/7400ICS M100MX.
NOTE 4:An attendant/extension of the NEAX2000 IVS
2/7400ICS M100MX cannot be a
conference leader.
NOTE 5:This service is available when the Attendant Console is provided at the IMX office on
the network. Uniformed Numbering Plan-CCIS X
Voice Call-CCIS X
Voice Mail Integration-CCIS X
Table 1-1  Event Based CCIS Feature List (Continued)
: Available
: Not available
SERVICE FEATURE AVAILABILITY REMARKS
X
–