NEC Neax 2400 Ipx Isdn Feature Programming Manual

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CALL TRANSFER SUPPLEMENTARY SERVICE (SS-CT) WITH REROUTING
Rerouting Function
1. Rerouting function is available when: 
(a) SS-CT service is available.
(b) Bearer Capability information of speech or 3.1 kHz audio is available for rerouting function
(Unrestricted digital data cannot be forwarded and the line is disconnected).
(c) Transmission speed rate is 64 kbps.
(d) The calling party, the called party, and the destination station are D
term or analog station.
(e) Another service is activated on the calling party, the called party, and the destination station.
2. Rerouting function is also available for the call in the example below.
3. When interworking through FCCS link, rerouting function is activated with no restriction.
4. When station-to-station connection is established between a calling party and a called party, the called party
and a forwarded party, rerouting function is not activated.
5. When rerouting function is not available or the activation is failed, Call Transfer service is activated without
rerouting function.
Calling Station (Station A): Office Code = 80, Station no. = 1000 
Called Station (Station B): Office Code = 82, Station no. = 3000 
Destination Station (Station C): Office Code = 83, Station no. = 4000
C. T.  is se t to “83-4000” 
: Q-SIG/IS-11572
: ACIS/CCIS
[routing selection data to Office Ò83Ó] 
1
st choice RT is RT1 
2nd choice RT is RT2  Station B
300082
Station A
100080
81RT2
RT 1
Station C
3000 83
1) Station A originates a call to Station B through Office “81”. 
(the call is routed to Station B through ACIS/CCIS a n d  Q-SIG/IS-11572 line) 
2) Station B transfer the call from Station A to Station C, Station B is released from the connection. 
3) New line from Office “81” to “83” is established for the call (RT1 is the first choice routing from Office “81” 
to “83”). Rerouted line connection is Office “80” → Office “81” → Office “83” 
Note:
ACIS/CCIS line (Office “80” to “81”) is not reestablished and Station Cs number is not displayed on
the LCD of Station A belonging to Office “80”.  
						

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6. Reestablished route is decided by the routing selection pattern data programmed at the office where the
calling party is accommodated or the gateway PBX office to the called station. Therefore, the improper route
or the route that is the same as before rerouting function may be selected depending on the office data. 
For Examples 1) through 4), see the figure below.
For Example 5), see the figure below.
Station BC.T. to Station C
200082
Station A
1000
81
RT1RT 2 RT3
Station C
3000 83
84
Station A
(2000)81
Station B (3000) 82
Station C 
(4000) 83
Example 1) the most proper routing is selected by the office data 
Routing selection data to Office “83” programmed at Office “81”:  1st RT 2,  2nd RT 1,  3rd RT 3 
RT2 is selected by rerouting function after Call Transfer is successful.
Example 2) the improper routing is selected by the office data 
Routing selection data to Office “83” programmed at Office “81”:  1
st RT 1,  2nd RT 2,  3rd RT 3 
RT1 is selected by rerouting function after Call Transfer is successful.
Example 3) the improper routing is selected because of alternate routing 
Routing selection data to Office “83” programmed at Office “81”:  1
st RT 2,  2nd RT 1,  3rd RT 3 
All trunks of RT2 (the first choice) are busy. 
RT1 is selected for alternate routing after Call Transfer is successful.
Example 4) the improper routing is selected because of the difference of protocol 
Routing selection data to Office “83” programmed at Office “81”:  1
st RT 2,  2nd RT 1,  3rd RT 3 
RT2 (the first choice) is ACIS/CCIS line (not Q-SIG or IS-11572 line). 
RT1 is selected for alternate routing after Call Transfer is successful.
Example 5)  the rerouting pattern is not changed from that before rerouting function. 
						

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4. Interactions
Call Transfer-Supplementary Service
1. When CALL PARK [C-29] is used with this feature:
The call parked by CALL PARK feature cannot be transferred by the SS-CT service. While, the station
operated CALL PARK can use the SS-CT service for the another incoming call.
2. When CALL HOLD [C-6] is used with this feature:
The call held by CALL HOLD feature cannot be transferred by the SS-CT service.
3. When STEP CALL [S-13] is used with this feature:
When the destination to be transferred with the SS-CT service is busy, a new call can be originated using
STEP CALL.
4. When OUTGOING TRUNK QUEUEING [O-2, 2D]/OFF HOOK QUEUEING [O-7, 7D]/INTER-OFFICE
OFF HOOK QUEUEING [I-11] service is used with this feature;
When the call is transferred to the trunk by the SS-CT service, those services cannot be set against the busy
trunk.
5. When Service Peg Count function of PEG COUNT [P-7] is used with this feature;
(a) When the transferring party operates to release from the connection after the station answers the call,
this service is included in “CALL TRANSFER - ALL CALLS” service count.
(b) When the SS-CT service is operated in the way of BLIND TRANSFER service, this service is not
counted.
6. This feature requires 24DTI circuit card.
7. When operating this service in the way of BLIND TRANSFER, the number that indicates the connected
party at the calling party’s LCD are different between CALL TRANSFER service activated through IS-
11572/Q-SIG and the service activated through CCIS.
 IS-11572/Q-SIG - The display of the calling party is changed from the transferring party’s number
(caller party’s number) to the destination’s number at the moment the transferring party releases from
the connection.
 CALL TRANSFER to be activated through CCIS - the LCD display of the calling party is changed after
the transferring party answers the call.
Rerouting Function
1. The calling party name or identification information is not displayed on the LCD of the destination station
while rerouting function is activated.
2. When the mediate user originates a call to the station on which Call Forwarding-Don’t Answer is set and
releases before the destination station answers the call, Call Forwarding-Don’t Answer is not effective while
rerouting function is activated. 
						

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CALL TRANSFER SUPPLEMENTARY SERVICE (SS-CT) WITH REROUTING
5. Programming
Assign the data for IS-11572/Q-SIG interface establishment referring to “IS-11572 (Layer 3 specifications for
inter-PBX signaling protocol)/Q-SIG (Circuit Switched Basic Call-ETSI Version)” on this manual.
STEP 1: ASYD - Assign the system data concerned with this feature.
SYS1, INDEX17, b4. Blind Transfer to Attendant  0/1 = Out/In Service
SYS1, INDEX69, b0. Return transferred call to transferring party after Recall Timer
expires
0/1 = Recall/No Recall (when C.F. - Don’t Answer is set at the transfer destination)
SYS1, INDEX140, b0-b6. The duration for which a call will ring at the transfer
destination before it will recall to the transferring party. (Assign this data when ASFC,
SFI103=0)
SYS1, INDEX247, b0-b6. No Answer timer for Blind Transfer station. (Assign this data
when ASFC, SFI103=1)
STEP 2: ASFC - Assign the service feature class (SFC) for allowing this service.
SFI103 (Assign the timer value of No Answer Timer for BLIND TRANSFER TO
STATION)
0=followed by Index 140/Index 247 assigned by ASYD.
SFI104 (Processing in a case when the transfer destination does not answer within a
predetermined period of time.) 
Note:This data is available when SYS1, INDEX69, b0=1
0=The transfer destination station rings continuously
1=C.F. - Don’t Answer is executed if it is set at the transfer destination
STEP 3: ARRC - Allow the alternative route connection between the outgoing trunk and the incoming trunk.
STEP 4: ARNP - Assign the route number “0” for the self office.
Note:This command data is not necessary for the closed numbering system.
STEP 5: ARTI - Assign the trunk application data.
CDN52 : CTCF - 1 = SS-CT/SS-CF service is effective.
CDN53 : RERT - 1 = Rerouting function is effective. 
						

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IS-11572 (LAYER 3 SPECIFICATIONS FOR INTER-PBX SIGNALING PROTOCOL)
I-42 IS-11572 (LAYER 3 SPECIFICATIONS FOR INTER-PBX SIGNALING PROTOCOL)
1. General Description
This feature allows inter-PBX link using Layer 3 signalling protocol supporting circuit mode bearer services
(ISO/IEC IS-11572). This feature has the following functions:
 Outgoing/Incoming Call Connection
 Tandem Connection
 Inter-PBX Link
This feature is available for the PBX with the PA-30PRTC circuit card.
1. Physical Interface
A maximum of 63 channels are to be controlled by a single Data Link channel. This feature, however, does
not support D-CHANNEL BACKUP.
PBX PBX
PRT PRTIS-11572
(
Private ISDN)
42B+D
Logical interface
Logical interface
DTI
DTI PBX4B+D
Legend: : D-channel
: B-channel 
						

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2. Bearer Capability
 The transfer rate is 64 kbps/384 kbps/1,536 kbps/64 kbps × n (since Release 4) only.
 This feature provides the following Bearer Capabilities:
– Speech
– Unrestricted Digital Information
– Restricted Digital Information (only in case of interworking)
– 3.1 kHz audio
– Unrestricted Multi-Rate
 At terminating PBX, received bearer capabilities are converted as shown below.
Speech, 3.1 kHz audio, 7 kHz audio → Speech
Unrestricted/Restricted Digital Information, Video → Unrestricted Digital Information
 Transparency of Bearer Capability when interworking with the C.O./Tie Line is shown in Table 6-1.
Table 6-1  Transparency of Bearer Capability When Interworking with C.O./Tie Line
BEARER CAPABILITY
SPEECH3.1k 
AUDIO7.1k AUDIOUNRESTRICTED
DIGITALRESTRICTED
DIGITALVIDEO
INTERWORKING
C.O. LineISDN → IS-11572 – –
IS-11572 → ISDNConverted to 
3.1k audioConverted to 
Unrestricted digital
Analog C.O. → IS-11572 – – – – –
IS-11572 → Analog C.O. – – – – – –
Tie LineCCIS → IS-11572 – – –
IS-11572 → CCISConverted to 
3.1k audioConverted to 
Unrestricted digitalConverted to 
Unrestricted digital
ACIS → IS-11572 – – – – –
IS-11572 → AC IS – – – – – –
 : Transparent
 : Not Available
– 
						

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IS-11572 (LAYER 3 SPECIFICATIONS FOR INTER-PBX SIGNALING PROTOCOL)
3. Connectivity
IS-11572 is available for the following connection and interworking with the other networks.
Note that connection test is required when the NEC’s PBX and other manufacturer’s PBX coexists in an
IS-11572 network.
CCISNEC ISDN
Analog C.O. Line
Existing Office
Existing OfficeOther Manufacturer
IS-11572
Network
IS-11572
ACIS 
						

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IS-11572 (LAYER 3 SPECIFICATIONS FOR INTER-PBX SIGNALING PROTOCOL)
 Connectivity between IS-11572 and terminal equipment is shown below.
4. Calling/Called Party Number Information
 As a calling/called party number, a maximum of 32 digits can be transmitted and received.
(Note that the contents of the calling/called party number display vary depending on the type of
terminal.)
 When different signalling systems are involved, transparency of calling/called party number is as
shown below:
D
term or analog telephone user can select whether to send the calling number or not.
2. Operating Procedure
No manual operation is required.
CONNECTIVITY REMARKS
BRI Station → IS-11572
IS-11572 → BRI Station
PRI Station → IS-11572
IS-11572 → PRI Station
IS-11572 → D
term
Dterm → IS-11572
Analog Station → IS-11572
IS-11572 → Analog Station
 : Available
TYPE OF NETWORK TRANSPARENCY
CCIS Network The former 16 digits are transferred.
ISDN Network Transparent
ISDN Private Network Transparent 
						

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3. Service Conditions
1. The multi-rate bearer service is available.
Multi-rate bearer service: Desirably multiplied value of 64 (64 kbps × “n”-desired number) is available for
the data transmission speed in addition to the current speed such as 384K (64K
× 6), 1536K (64K × 24) and 1920K (64K × 30).
The following service conditions are concerned with the multi-rate bearer service.
(a) Routing data must be assigned per physical interface (PRT/DTI).
(b) Overlap sending (LCRS) is not provided with this feature.
(c) Multi-rate bearer service is provided for the PBXs connecting directly with the Q-SIG interface. (If
the PBXs are connected with the different interface such as the interface defined by Q.931/Q.931-a or
CCIS, only H0/H1 service (transfer rate is 384 kbps/1.5 Mbps) is available.)
2. The User-to-User Signaling (UUS) can be sent via Q-SIG interface.
The following conditions are for the UUS transmission.
(a) The maximum data capacity for the UUS is 128 bytes and the latter part of excessive data is
automatically omitted.
(b) The following messages for call establishment/clearing may include the UUS.
Setup
 Alerting
 Connect
 Progress
 Disconnect
 Release
 Release Complete 
						

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(c) The connection patterns for the UUS transmission are shown in the figure below.
Pattern 1: The ISDN tandem connection
Note:  
Either ISDN(a) or ISDN(b) is Q-sig/IS-11572 interface.
PBX                                          PBX                                          PBX
ISDN(a)
Pattern 2: The interface used in the terminating office is Q-sig/IS-11572.
Pattern 3: The interface used in the originating office is Q-sig/IS-11572.
                                                PBX                                          PBX
PBX                                              PBX                                            Q-sig/
IS-11572
   Q-sig/
IS-11572 ISDN
terminal
ISDN
terminal
ISDN
message
(UUS)
ISDN
message
(UUS)
ISDN
message
(UUS)ISDN
message
(UUS)
ISDN
message
(UUS)
ISDN
message
(UUS)
ISDN(b)