NEC Neax 2400 Ipx Isdn Features And Specifications

							NEAX2400 IPX ISDN Features and Specifications
Page 156NDA-24311, Issue 1
C-158 Call Forwarding Supplementary Service (SS-CF) with Rerouting
C-158 Call Forwarding Supplementary Service
 (SS-CF) with Rerouting
General Description
This feature provides Call Forwarding service activated following ETS 300 257 protocol (SS-CF). By using this
feature, all incoming calls can be forwarded automatically after the destination is programmed against the called
party. Also, rerouting function is activated with SS-CF service.
The functions of this feature are divided into the following:
1. Call Forwarding - Supplementary Service
Example) The service activation procedures below are explained under this condition.
Station A : Calling Station
Station B : Called Station (Forwarding Station)
Station C : Forwarded-to Station
a.) Supplementary Service - Call Forwarding Unconditional (SS-CFU)
All incoming calls routed to the station are forwarded to the designated destination automatically.
(1) Station A originates a call to Station B.
(2) The call is forwarded to Station C.
b.) Supplementary Service - Call Forwarding Busy (SS-CFB)
When the called station is busy, an incoming call terminated at the station is forwarded to the
designated destination automatically.
When Station B is busy, the call is forwarded to Station C.
c.) Supplementary Service - Call Forwarding No Reply (SS-CFNR)
When the called station is not answered for a predetermined time, an incoming call terminated at
the station is forwarded to the designated destination automatically.
(1) When Station A originates a call to Station B (Station B is ringing).
(2) Since Station B has not answered for a predetermined time, a call is forwarded to Station C. 
						

							NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 157
Call Forwarding Supplementary Service (SS-CF) with Rerouting C-158
General Description (cont’d)
2. Rerouting Function
In order to select the most proper routing (prevent to keep holding the unnecessary line), the line from the
calling party to the forwarded destination is newly established when SS-CF service is successful. LCDs
of stations concerned with this service are shown below.
Example) SS-CFU is used in this example.
Station A : Calling Party
Station B : Called Party (Forwarding Party)
Station C : Forwarded-to Party
1. Station A originates a call to Station B. LCD display on station A is 3001.
Station A
(2001)
Station B
(3001)Station C
(4001) CALL
2. As the SS-CFU is activated, a new call is automatically originated from Station A to Station
C and the line used for Station A through Station C is reestablished. LCD display on Station
A is 4001, and 2001 is displayed on Station C’s LCD.
Station A
(2001)
Station B
(3001)Station C
(4001) DISCONNECTED
NEWLY
ESTABLISHED LINK
: Q-SIG 
						

							NEAX2400 IPX ISDN Features and Specifications
Page 158NDA-24311, Issue 1
C-158 Call Forwarding Supplementary Service (SS-CF) with Rerouting
Operating Procedure
To set the service
The SS-CF service setting should not be duplicated. The following operations (either by the access code or by the
feature/soft key) should be performed for each service.
Note:The CF-B and CF-NR can be set/cancelled at one time depending on the system data.
Using the access code
1. Lift the handset; receive dial tone.
2. Dial each access code for setting the corresponding Call Forwarding service; receive special dial tone.
3. Dial the destination’s number; receive service set tone.
4. Replace the handset.
Using the feature/soft key
1. Lift the handset; receive dial tone.
2. Press each feature/soft key for setting the corresponding Call Forwarding service; receive special dial tone.
3. Dial the destination’s number; receive service set tone.
4. Replace the handset.
To cancel the service
Using the access code
1. Lift the handset; receive dial tone.
2. Dial each access code for canceling the corresponding Call Forwarding service; receive service set tone.
3. Replace the handset.
Using the feature/soft key
1. Lift the handset; receive dial tone.
2. Press each feature/soft key for canceling the corresponding Call Forwarding service; receive service set
tone.
3. Replace the handset.
Service Conditions
Call Forwarding - Supplementary Service
1. The conditions for service set/cancel are the same as those of CALL FORWARDING - ALL CALLS [C-
5]/BUSY LINE[C-2]/DON’T ANSWER[C-3].
2. The allowable terminals for this service are a D
term, analog station, ISDN terminal, PCS and Attendant
Console.
3. This feature is available with ETS 300 172 interface.
4. This feature is restricted by the Service Feature Restriction Class (SFC) that denies CALL
FORWARDING - BUSY LINE [C-2]/DON’T ANSWER [C-3]/ALL CALLS [C-5].
5. The name display for supplementary information is available with this feature if Name Identification
supplementary services (ETS 300 238) are provided.
6. The conditions for the display, transmission, set or cancel of the name display function, the supplementary
service of this feature, are the same as those of Name ID function provided as the supplementary service
of Q-SIG. Refer to CALLING NAME IDENTIFICATION (CNIP)/CONNECTED NAME
IDENTIFICATION PRESENTATION (CONP) [C-153]. 
						

							NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 159
Call Forwarding Supplementary Service (SS-CF) with Rerouting C-158
Service Conditions (cont’d)
7. When the station is called back, the SS-CF service is not activated. (The call is not forwarded to the
destination, but the call is terminated at the called station.)
8. When multiple SS-CF services are set:
 Maximum number of times for Call Forwarding is five (depending on the system data).
 The above-mentioned number is described on the number of time that service is continuously
activated through Q-SIG.
 The number of times that Call Forwarding service is activated within the system is not included
in the above-mentioned number.
 Call Forwarding is not activated after the service is performed the preprogrammed number of
times.
9. When the forwarded party or the forwarded trunk is busy:
SS-CFU: The call is forwarded. The caller hears busy tone.
SS-CFB: The call is forwarded. The caller hears busy tone.
SS-CFNR: The call is not forwarded. The call continues to be placed at the party to be set SS-CFNR to
the busy party.
10. When the forwarded destination is the calling party:
(For example, Station A originates a call to Station B, and Station B is set the SS-CF service to forward a
call to Station A)
SS-CFU: The call is forwarded. The caller hears busy tone.
SS-CFB: The call is not forwarded. The caller hears busy tone.
SS-CFNR: The call is not forwarded. The call continues to be placed at the party programmed SS-CFNR
to the calling party.
11. When a forwarded party is set multiple SS-CF and its destination is the forwarding party (the number of
times for activating the service does not exceed the preprogrammed number):
Example 1) Station A originates a call to Station B, and Station B is set to forward a call to Station
C. Station C is set to forward a call to Station B.
The call is terminated at the Station B after being forwarded to Station C.
Example 2) Station A originates a call to Station B, and Station B is set to forward a call to Station
C. Station C is set to forward a call to Station D and then Station D is set to forward a
call to Station B.
The call is terminated at the Station B after being forwarded to Station C and D.
12. When the service is used to be interworked with the interface except Q-SIG, the displayed number is as
follows:
 On the caller’s LCD, the display that indicates the connected party’s number is not changed
until the forwarded destination answers the call. (If using Q-SIG interface, the display is
changed when the call is forwarded and the called party starts to ring.) After the call is
answered, the display is changed from the caller number to the destination’s number. 
 On the destination’s LCD, the display is the same as when the call is forwarded using the CALL
FORWARDING service. 
						

							NEAX2400 IPX ISDN Features and Specifications
Page 160NDA-24311, Issue 1
C-158 Call Forwarding Supplementary Service (SS-CF) with Rerouting
Service Conditions (cont’d)
Rerouting Function
1. Rerouting function is available when:
a.) SS-CF 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.) Each of the calling party and the called party is a D
term or analog station. (When either of them is
an ISDN terminal, PS terminal or Attendant Console, Call Forwarding service is activated
without rerouting function). As for the forwarded-to station, any terminal is available for this
service.
e.) Another service is activated on the calling party.
2. Rerouting function is also available for the call in the case 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 the forwarded party, rerouting function is not activated (Station-to-station connection in an
FCCS network is also applied to this conditions). 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
1000 Station A
80 8182 Station B
3000 4000Station C C.F. is set to 83-4000
RT2
RT1
[routing selection data to Office 83]
1st choice RT is RT1
2nd choice RT is RT2
: Q-SIG
: ACIS/CCIS
1. Station A originates a call to Station B through Office 81.
(The call is routed to Station B through ACIS/CCIS and Q-SIG line.)
2. Since Station B is set Call Forwarding service, the call is forwarded to Station C.
3. New line from Office 81 to 83 is established for the call (RT 1 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 C’s number is not displayed on the LCD
of Station A belonging to Office 80.    
83 
						

							NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 161
Call Forwarding Supplementary Service (SS-CF) with Rerouting C-158
Service Conditions (cont’d)
5. When the selected route for forwarding a call (from the called station to the forwarded-to station) is other
than Q-SIG line, Call Forwarding service is activated without rerouting function. See the figure below.
6. When there is no route that supports Q-SIG protocol in the route selection data from a calling party to a
called station, Call Forwarding service is activated without rerouting function. In this case, rerouting function is not activated.
Station A calls Station B, which is set C.F. service to Station C.
The call is forwarded to Station C using the protocol other than Q-SIG.
81
Station A
(2000)
Station B (3000) 82
Station C
(4000) Q-SIG ACIS/CCIS83
In this example, since the Q-SIG line cannot be selected for a route from Station A (calling station) to
Station C (forwarded-to station), rerouting function is not activated even if RT1 or RT2 is idle.
Station B
3000 4000Station C
RT2 RT1
81
Station A
1000
8184
8283
CCIS
ACIS
: Q-SIG
: ACIS/CCIS
C.F. to Station C 
						

							NEAX2400 IPX ISDN Features and Specifications
Page 162NDA-24311, Issue 1
C-158 Call Forwarding Supplementary Service (SS-CF) with Rerouting
Service Conditions (cont’d)
7. Reestablished route is decided by the routing selection pattern data programmed at the office where the
calling party is accommodated or at 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 Example 1) through 4), see the figure below.
Example 1) The most proper routing is selected by the office data.
Routing selection data to Office 83 programmed at Office 81: 1
st RT2, 2nd RT1, 3rd RT3
RT2 is selected by rerouting function after Call Forwarding 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 RT1, 2nd RT2, 3rd RT3
RT 1 is selected by rerouting function after Call Forwarding 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 RT2, 2nd RT1, 3rd RT3
All trunks of RT2 (the first choice) are busy.
RT1 is selected for alternate routing after Call Forwarding 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 RT2, 2nd RT1, 3rd RT3
RT2 (the first choice) is ACIS/CCIS line (not Q-SIG line).
RT1 is selected for alternate routing after Call Forwarding is successful.
For Example 5), see the figure below.
Example 5) The rerouting pattern is not changed from that before rerouting function.
81
Station A
(2000)
Station B (3000) 82
Station C
(4000)83
Station B
2000 3000Station C
RT2
RT1
Station A
1000
8184
8283
RT3C.F. to Station C 
						

							NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 163
Call Forwarding Supplementary Service (SS-CF) with Rerouting C-158
Interactions
Call Forwarding - Supplementary Service
1. When CALL COMPLETION ON NO REPLY (CCNR) is used with this feature that conforms to Q-SIG:
Note:CCNR available for the Q-SIG network.
SS-CFU: CCNR is not available for the station to be set the SS-CFU.
SS-CFB: CCNR is activated against the forwarding station (called station) even when the feature is set
to the station to be set SS-CFB.
SS-CFNR: CCNR is activated against the forwarded-to station no matter when (before of after Call
Forwarding) the CCNR is set.
2. When CALL COMPLETION TO A BUSY SUBSCRIBER (CCBS) is used with this feature that conforms
to Q-SIG:
Note:CCNR available for the Q-SIG network.
SS-CFU: CCNR is not available for the station to be set the SS-CFU.
SS-CFB: CCNR is activated against the forwarding station (called station) even when the feature is set
to the station to be set SS-CFB. (If the forwarding station is busy at that time, CCBS is
restricted.)
3. When CONNECTED NAME IDENTIFICATION PRESENTATION (CONP) is used together with this
feature:
SS-CFU: If the name information has been programmed, CONP is not effective and the connected
party name is displayed following the name information programmed with SS-CFU data.
SS-CFB: If the name information has been programmed, CONP is not effective and the connected
party name is displayed following the name information programmed with SS-CFB data.
SS-CFNR: If the name information has been programmed, CONP is not effective and the connected
party name is displayed following the name information programmed with SS-CFNR data.
4. When CALL WAITING - TERMINATING [C-12] is used together with this feature:
When automatic CALL WAITING - TERMINATING is set to the station that has already been set this
feature, this feature has priority over CALL WAITING - TERMINATING service and the call is
forwarded.
5. When DO NOT DISTURB [C-11D] service is used together with this feature:
SS-CFU: If incoming calls are terminated at the station to be set both features (SS-CFU and DND), the
calls are forwarded by the SS-CFU data.
SS-CFB: If incoming calls are terminated at the station to be set both features (SS-CFB and DND), the
calls are forwarded by the SS-CFB data.
SS-CFNR: If incoming calls are terminated at the station to be set both features (SS-CFNR and DND),
the DND service takes priority and the caller hears reorder tone.
6. When OUTGOING TRUNK QUEUING [O-2] service is used with this feature:
When the call is forwarded to the trunk by the SS-CF service and the destination trunk is busy, OGQ
service is not effective if the Automatic OGQ is available (the call continues to place at the trunk). 
						

							NEAX2400 IPX ISDN Features and Specifications
Page 164NDA-24311, Issue 1
C-158 Call Forwarding Supplementary Service (SS-CF) with Rerouting
Interactions (cont’d)
7. When the OFF HOOK QUEUING [O-7] service is used with this feature:
SS-CFNR: When the call is forwarded to the trunk by SS-CFNR and the destination trunk is busy, OFF
HOOK QUEUING is not available (the call continues to be placed at the trunk).
SS-CF (except SS-CFNR):
When the idle destination picks up the call after the call is queued using OFF HOOK
QUEUING, the calling number display or the name display is not provided.
8. When the call forwarded by this feature is forwarded by AUTOMATIC ANNOUNCEMENT - CALLED
PS OUT OF ZONE [A-129]/CALL FORWARDING PS INCOMING CALL INCOMPLETE [C-155]
service due to that the call cannot terminate to the destination PS which is out of zone or whose power is
OFF, the calling number display or name display is not provided.
9. This feature requires 24DTI circuit card.
10. The conditions of displayed number at the destination are described below comparing with the CCIS
service.
a.) Call Forwarding - All Calls/Busy Line:
Q-SIG -The displayed number that indicates the connected party is changed from the called party
(forwarding party) to the destination before the destination answers the call (at the moment
the call is forwarded).
CCIS - The displayed number that indicates the connected party is changed from the called party
(forwarding party) to the destination after the destination answers the call.
b.) Call Forwarding - Don’t Answer:
Q-SIG -The displayed number that indicates the connected party is changed from the called party
(forwarding party) to the destination before the destination answers the call (at the moment
the No Answer timer has been elapsed).
CCIS - The displayed number that indicates the connected party is changed from the called party
(forwarding party) to the destination after the destination answers the call.
Rerouting Function
The calling party name or identification information is not displayed on the LCD of the destination station (Calling
Name Identification Presentation (CNIP)/Connected Name Identification Presentation (CONP) is not available)
while rerouting function is activated. 
						

							NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 165
Call Transfer Supplementary Service (SS-CT) with Rerouting C-159
C-159 Call Transfer Supplementary Service
 (SS-CT) with Rerouting
General Description
This feature provides CALL TRANSFER activated to be followed by ETS 300 260 protocol (SS-CT). By using this
feature, the station can hold the handling call to transfer to the remote terminal. The rerouting function is also
activated with SS-CT service.
The functions of this feature are divided into the following:
1. Call Transfer - Supplementary Service
Example) Station A : Calling Party
Station B : Called Party (Transferring Party)
Station C : Transferred-to Station
a.) When the intermediate party is disconnected after the transferred-to party answers the call:
(1) Station B holds a call from Station A.
(2) Station B calls Station C and Station C answers the call.
(3) Station A is connected to Station C as Station B is disconnected.
b.) When the intermediate party is disconnected before the transferred-to party answers the call
(BLIND TRANSFER):
(1) Station B holds a call from Station A.
(2) Station B places a call to Station C.
(3) Station B disconnects the call, and the tone Station A receives changes from the hold tone to
the ringback tone.   
(4) Station A is connected with Station C.