NEC Neax 2400 Ipx Isdn Features And Specifications

							NEAX2400 IPX ISDN Features and Specifications
Page 166NDA-24311, Issue 1
C-159 Call Transfer Supplementary Service (SS-CT) with Rerouting
General Description (cont’d)
2. Rerouting Function
In order to prevent holding the unnecessary line, the line from the calling party to the transferred
destination is newly established when SS-CT service is successful, LCDs of stations concerned with this
service are shown below.
Station A : Calling Party
Station B : Called Party (Transferring Party)
Station C : Transferred-to Party
1. Station A originates a call to Station B. LCD display on station A is 3001, and LCD  display
on Station B is TRANSFER.
Station A
(2001)
Station B
(3001)Station C
(4001) CALL
2. Station B transfers the call to Station C and Station C answers the call. LCD display on
Station A is 3001, LCD display on Station B is TRANSFER and LCD display on Station C
is 3001.
Station A
(2001)
Station B
(3001)Station C
(4001) DISCONNECTED
NEWLY
ESTABLISHED LINK
: Q-SIG
Station A
(2001)
Station B
(3001)Station C
(4001) CALLTRANSFER
3. As Station B is released from the connection, 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. 
						

							NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 167
Call Transfer Supplementary Service (SS-CT) with Rerouting C-159
Operating Procedure
This feature is operated when the station is in the two-party connection.
To set the service
1. Perform the switch hook flash; receive special dial tone.
2. Dial the destination’s number; receive ringback tone.
3. The destination party answers the call.
4. The user replaces the handset. Note
5. The calling party and the transferred-to party are connected. 
Note:The user may replace the handset before the transferred-to party answers the call. In that case, the caller hears
ringback tone in place of hold tone.
Service Conditions
Call Transfer - Supplementary Service
1. This service is available for a Dterm, analog station, ISDN terminal, PCS terminal, or Attendant Console.
2. This feature is available with ETS 300 172 interface.
3. Bearer Capability information available for this service is speech and 3.1 kHz audio.
4. When the transferring party gets into a conversation with the destination party after the destination
answers the call, the switch hook flash may be used to switch the connected party to the held party.
5. If the transferring party hangs up before the destination answers the call (transfers a call by BLIND
TRANSFER) and the transferred-to party is busy, the transferring party is recalled.
6. If the call transferred is to be released from the connection after the destination answers the call, the
switchhook flash is available for the transferring party to place back the original connection in case the
destination is busy. (One digit dialing is not available for this operation.) 
7. When the transferring station is released from the connection after flashing the switchhook and hears
special dial tone (before dialing the destination’s number), the caller hears reorder tone. In this case, the
transferring station is not recalled.
8. When the Call Transfer service is not available because of Register Prepause Timer time out or Register
Inter-Digit Timer time out, the transferring party hears reorder tone. In this case, the transferring party can
perform the switchhook flash to reconnect with the calling party.
9. In this service, an incoming call via the COT cannot be transferred using BLIND TRANSFER service.
10. When the service used is to be interworked with an interface except Q-SIG, the displayed number is not
changed at the calling station. The display is the same as before the SS-CT service activated and the LCD
of the calling station displays the called station (transferring party). However, the LCD of the destination
displays the calling station.
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.
c.) Transmission speed rate is 64 kbps. 
						

							NEAX2400 IPX ISDN Features and Specifications
Page 168NDA-24311, Issue 1
C-159 Call Transfer Supplementary Service (SS-CT) with Rerouting
Service Conditions (cont’d)
d.) Each calling party, the called party and the destination station is a Dterm or analog station. 
e.) Another service is activated on the calling party, called party and destination station.
2. Rerouting function is also available for the call as in the following case.
4. When interworking through FCCS link, rerouting function is activated with no restriction.
5. When station-to-station connection is established between a calling party and a called party, the called
party and the transferred-to party, rerouting function is not activated.
6. 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
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. Station B transfers 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 (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.    
1000 Station A
80 8182 Station B
3000 4000Station C C.T. is set to 83-4000
RT2
RT1
[routing selection data to Office 83]
1st choice RT is RT1
2nd choice RT is RT2
83: Q-SIG
: ACIS/CCIS 
						

							NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 169
Call Transfer Supplementary Service (SS-CT) with Rerouting C-159
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, an improper
route or the route that is the same as before the 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 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 RT1, 2nd RT2, 3rd RT3
RT 1 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 RT2, 2nd RT1, 3rd RT3
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 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 Transfer is successful.
For Example 5), see the figure below.
Example 5) The rerouting pattern is not changed from that before rerouting function.
Station B
2000 3000Station C
RT2
RT1
Station A
1000
8184
8283
RT3C.T. to Station C
81
Station A
(2000)
Station B (3000) 82
Station C
(4000)83 
						

							NEAX2400 IPX ISDN Features and Specifications
Page 170NDA-24311, Issue 1
C-159 Call Transfer Supplementary Service (SS-CT) with Rerouting
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. However, the station
which operated CALL PARK can use the SS-CT service for 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 which the call is transferred with the SS-CT service is busy, a new call can be
originated using STEP CALL.
4. When OUTGOING TRUNK QUEUING [O-2, 2D]/OFF HOOK QUEUING [O-7, 7D]/INTER-OFFICE
OFF HOOK QUEUING [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 be released 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 using the BLIND TRANSFER service, it is not counted.
6. This feature requires 24DTI circuit card.
7. When this service is operated by using BLIND TRANSFER, the number that indicates the connected party
at the calling party’s LCD is different between CALL TRANSFER service activated through Q-SIG and
the service activated through CCIS.
 Q-SIG - The display of the calling party is changed from the transferring party’s number (calling 
party’s number) to the destination’s number at the moment the transferring party is released 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, which is set Call Forwarding - Don’t Answer, and
is released before the destination station answers the call, Call Forwarding - Don’t Answer is not effective
while rerouting function is activated. 
						

							NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 171
CCIS Tandem Call - Calling Party Number (CPN) Delivery to ISDN & Q-SIG Networks C-164
C-164 CCIS Tandem Call - Calling Party Number 
(CPN) Delivery to ISDN & Q-SIG Networks
General Description
This feature allows the call from a Tie Line (CCIS line or Q-SIG) station or Attendant Console for INDIVIDUAL
ATTENDANT ACCESS [I-6], to be sent to the public ISDN network (AT&T, NT, NI-2) and Q-SIG network. With
this feature, the calling party number can be changed as programmed and sent to the ISDN network/Q-SIG network.
Since the data can be set to designate the received number in addition to the outgoing route to ISDN network, a
variety of calling party number assignments is available.
Operating Procedure
No manual operation is required.
Service Conditions
1. This feature is effective when:
 Calls are originated from CCIS/Q-SIG line to AT&T, NT, NI-2 or Q-SIG network.
 Calls are originated from the station to AT&T, NT, NI-2 or Q-SIG network.
 Calls are originated from the Attendant Console, which is assigned the individual attendant
identification number, to AT&T, NT, NI-2 or Q-SIG network.
2. This feature is not effective when calls are originated from AT&T, NT, NI-2 network to AT&T, NT, NI-
2 network.
3. When the registered calling party number is received from CCIS line and sent to AT&T, NT, NI-2 network
by this feature, the access code and the office code are not deleted automatically as normal operation.
4. In case the number of digits of the registered number is less than that of the calling party number sent from
CCIS/Q-SIG line, this feature is effective when the first part of the received calling party number is
identical with the registered number.
5. When assigning more than 8-digit number (including the office code of the self office) to be received from
the CCIS line, the number must be assigned as Physical Telephone Number because Physical Station
Number is sent as the calling party number.
6. This feature is not available for the call originated using OAI/ACD feature.  
						

							NEAX2400 IPX ISDN Features and Specifications
Page 172NDA-24311, Issue 1
D-123 Direct Inward Dialing (DID) Addressing
D-123  Direct Inward Dialing (DID) Addressing
General Description
This feature provides for a called party number received via ISDN to be used to designate the station at which the
call is to terminate.
Operating Procedure
No manual operation is required.
Service Conditions
1. The DIRECT INWARD DIALING (DID) numbering plan provided from the ISDN office determines the
number of stations that can take advantage of this service.
2. If the network is notified that the destination station for the DID call is busy or a connection-controlled
station, the network gives the calling station a busy tone. (This depends upon call forwarding services
being in service.)
3. The DID number can be converted to a telephone number in the PBX.
DID Addressing Conversion
Station #Sub-
address
451-7001
451-7001Station
1234
1201All digits
converted
Partial
conversion
No Conversion
Conversion of 1st and 2nd digits 
						

							NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 173
D Channel Backup - PRI D-152
D-152  D Channel Backup - PRI
General Description
This feature provides a backup D-channel in non-facility associated signaling, by which even if the primary
D-channel encounters link down, etc., the backup D-channel may be active.
Operating Procedure
Manual switch-over is available by:
 designating the required route by means of MAT command (CDBU).
 pull up MB switch on a circuit card of the active D-channel. (Circuit card Make Busy)
 switching on the LB#3 switch on a circuit card of the active D-channel. (Dch handler Make Busy request)
Service Conditions
1. This service may be provided when non-facility associated signaling is employed.
2. The protocol for network interface is AT&T or Nortel.
3. Main and backup D-channels, and all controlled B-channels, must be assigned in the same LP.
4. If the 2DCH circuit card is used, assignment of both main and backup D-channels is not permitted on the
same circuit card.
5. Start/completion of D-channel switch-over displays as a system message.
6. The switch-over status may be displayed from the MAT.
7. Switch-over from the MAT must be done only when both main and backup links are established. (Pulling
up MB switch or switching on the LB#3 switch on a circuit card is not restricted.)
8. Office data for the backup D-channel must not be changed during switch-over.
9. A speech path is kept during and after switch-over.
10. Send/received messages in firmware during a layer 2 failure are cleared.
11. Identification of the active D-channel cannot be determined by the LED on the circuit cards. (It is available
by reading the memory from the MAT command.)
12. Just after the system/LP initialization, the primary D-channel is ACT. However, if the backup 
D-channel is established before the primary D-channel is done, backup D-channel is ACT.
13. Timer value of T321 may be determined by system data. Its default value is 30 seconds.
14. Backup timer value may be determined by system data. Its default value is 0 second.
15. This service supports T309. (This is used to set the recovery time from both main and backup D-channels
lost link.) 
						

							NEAX2400 IPX ISDN Features and Specifications
Page 174NDA-24311, Issue 1
E-23 Event Based CCIS - ISDN Transport
E-23  Event Based CCIS - ISDN Transport
General Description
This feature provides Virtual Tie Line service for each event such as call origination and MCI message transmission.
Inter-PBX link for this feature is established on B-channels of the public ISDN line using CCIS No. 7 signaling
protocol. For addressing a specific terminal, Called Sub Address or Called DID Number is used depending on the
network configuration.
Operating Procedure
No manual operation is required.
Service Conditions
1. The ISDN Primary Rate Interface (PRI) trunk is used for this feature.
2. The following ISDN interfaces are available:
No.4ESS
DMS100
N-ISDN2
3. When using Called Sub Address as addressing information:
a.) channel negotiation and Sub Address - Addressing must be available in the public ISDN network.
b.) different DID Numbers must be assigned to the ISDN line, the E-CCIS line and its alternate route
respectively. For E-CCIS, DID Number is required for each D-channel.
c.) Sub Address assigned to the E-CCIS trunk must be common to both offices.
4. When using Called DID Number as addressing information
a.) a different DID Number is required for each channel of an E-CCIS line.
b.) when channel negotiation is not available, call termination to an E-CCIS trunk must not be
allowed except when DID Number assigned to the trunk is dialed.
c.) different DID Numbers must be assigned to the ISDN line and the E-CCIS line. For E-CCIS, DID
Number is required for each D-channel.
d.) alternate route for the E-CCIS line cannot be assigned.
5. Each trunk for E-CCIS line cannot be used for the public ISDN line.
6. An E-CCIS signal channel and E-CCIS voice channels controlled by that signal channel must be assigned
in the same turn. (Each channel used for an E-CCIS line must be controlled by a single D-channel.)
7. The number of routes that can be assigned for E-CCIS is up to five routes per D-channel.
8. When Verification of Connection is in service, and if the last four digits of the received number are
different from those of the called number assigned by System Data, the connection is not established.
9. Release Timer of an E-CCIS line should be assigned for each channel (the value is assigned on a route
basis). When assigned time goes up after call completion, the E-CCIS line is released. The timer may be
15 sec., 30 sec., 1 min., 2 min., 5 min., 10 min., 1 hr., immediately after call completion (for a voice
channel only) or not released. If there is no assignment, 3-minute timer is set. If immediately after call
completion is set for the signal channel, 1-minute timer is set. 
						

							NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 175
Event Based CCIS - ISDN Transport E-23
Service Conditions (cont’d)
10. The following are the conditions of E-CCIS setup, Release Timer setting and E-CCIS release:
a.) Conditions of E-CCIS setup:
 If no voice channels are set up when a call occurs, a voice channel and the signal channel are
set up at the same time.
 If the signal channel is set up and no voice channels are released (Release Timer is being
activated), or if the signal channel is set up and no voice channels are set up, a voice channel is
set up when a call occurs.
 If no channels are set up when the signal controlled by the signal channel only (MCI, MW lamp
control, etc.) occurs, the signal channel is set up.
b.) Conditions of Release Timer setting:
 When the signal controlled by the signal channel only is transmitted or received, Release Timer
of the signal channel is activated.
 At the time of call completion, Release Timer of a voice channel is activated.
c.) Conditions of E-CCIS release:
 If all the voice channels but one are released and Release Timer of the signal channel has not
been set, the established voice channel and the signal channel are released at the same time
when Release Timer of the voice channel expires (at the time of call completion, if Release
Timer is set at immediately after call completion).
 When Release Timer of a voice channel expires, and if another voice channel or the other voice
channels are setup, that voice channel is released.
If all the voice channels but one are released, and when Release Timer of the established voice
channel expires while Release Timer of the signal channel is being activated, the voice channel
is released.
 If Release Timer of the signal channel expires when no voice channels are set up, the signal
channel is released.
 If Release Timer of the signal channel expires (Release Timer has not been assigned.) when one
or more voice channels are set up, no channels are released.
11. If all the E-CCIS routes are used, the connection can be established using the alternate route.
12. When the connection is not established due to line failure, etc., system message is output.
13. Bearer capability for voice channels of the E-CCIS line can be selected on a route basis, unrestricted digital
or speech. However, Bearer capability for a signal channel is unrestricted digital only.
14. If speech is selected for bearer capability for a signal channel of the E-CCIS line, data communication
using that E-CCIS route is restricted.
15. When the signal channel of the E-CCIS line is set up, the message control signal (such as the MCI
message) is sent to an E-CCIS route immediately. If not, the signal channel of the E-CCIS line is set up,
and then the message control signal is transmitted.
16. If patrol operation is performed for the E-CCIS turn, that E-CCIS line should be in the status of Release
Timer time out.
17. A trunk used at the time of call origination is selected from the trunk which has been set up for the E-CCIS
line. If two or more trunks have been set up, a trunk is selected by Trunk Route Data.