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:
...

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,...

 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...

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...

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...

 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...

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...

 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...

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...