NEC Neax 2400 Imx Isdn Features And Specifications

							NEAX2400 IMX ISDN Features and Specifications
NDA-24281, Issue 1
Page 55
Data Communications - PRI D-121
Service Conditions
Modem and Modem Pool Calls
1. A total of eight modem pool groups may be assigned: eight incoming, eight outgoing, eight bothway, or
any combination thereof.
2. Modems must be compatible.
3. Modems in a modem pool may be permanently assigned, end-to-end, to a PRI channel on a dedicated line
basis; otherwise, modem pools are normally dynamically assigned on a switched basis to an incoming or
outgoing data caller on a PRI channel. In this case, the same PRI channels are available for voice also.
4. The maximum modem speed is 9600 bps. Both asynchronous and synchronous modems may be used in
the modem pool. Modems connected to analog extensions may be asynchronous or synchronous.
Unrestricted Data
1. The following communication speeds are supported:
Asynchronous: 50 ~ 9600 bps
Synchronous: 2.4K, 4.8K, 9.6K, and 48K bps
2. Attribute Data for remote AUTOMATIC ATTRIBUTE DATA RECOGNITION [A-40] will not be
passed over a digital link modem connections.
3. Pooled modems and modems connected to analog stations may be used on PRI channels when a straight
digital data connection is not required. With PRI, modem pooling will always be automatic when
accessing a PRI channel by setting the AMND command of the MAT to 0. If AMND is set to 1, the channel
will either use modem pooling or a straight digital path, depending on the number dialed. This number is
compared with the PRI link to the other end switch to determine if an analog or digital extension is being
called.
4. PRI requires one D-channel of a 24-channel digital line for out-of-band signaling. The other 23 channels
(B-channels) can be used for voice or data, or both. 
						

							NEAX2400 IMX ISDN Features and Specifications
Page 56NDA-24281, Issue 1
D-122 Data Uniform Numbering Plan - PRI
D-122  Data Uniform Numbering Plan - PRI
General Description
This feature enables data stations to be assigned a set of UNIFORM NUMBERS to distinguish data extensions from
voice extensions.
Data Uniform Numbering Plan Connection
Operating Procedure
Originating a Data Adapter/Data Module call using Uniform Numbering
1. Dial the private line access code (usually 8).
2. Dial the interoffice number (location code uniform number) and the desired DTE number; RDX
(interoffice number) - XXXX (desired DTE number).
3. When the called DTE answers, data communication can begin.
Originating a Data Adapter/Data Module call using Inter-Office Coordinate Numbering Plan
1. Dial the interoffice number (location code uniform number).
2. Dial the desired DTE number.
3. When the called DTE answers, data communication can begin.
Service Conditions
1. Careful consideration should be given to numbering plan assignments, especially in larger systems, to
avoid unnecessary loss of access codes or duplication of telephone numbers.
2. There is no limit to the number of groups assigned per system.
3. Telephone numbers cannot be duplicated between tenants.
4. Data extensions must contain from two to five digits.
5. Flexible data telephone numbering can also be used; however, its use is not recommended.
6. When an access code, an office termination code, and an interoffice data extension are dialed, the access
code and the first digit of the office termination code cannot be the same. For example, if 8-RNX-XXXX
is dialed to access an interoffice DTE; R cannot equal 8, N can equal 2 - 9, and X can equal 0 - 9.
7. KEYBOARD DIALING [K-1, K-2] can be used in conjunction with this feature.
8. Data calls over Tie lines require the use of modem pooling.
DTE
DA
or
DMNEAX2400 IMX
ISDN (PRI)8
OG Modem
PoolNEAX2400 IMX NEAX2400 IMX
ISDN (PRI)
IC Modem
PoolDA
or
DM 5XXX Location
Code:
632
CPU
Host
Computer
Example:   DTE user dials 8 + 632-5XXX
Note:
 EPN = Electronic Private Network 
						

							NEAX2400 IMX ISDN Features and Specifications
NDA-24281, Issue 1
Page 57
Direct-In Termination (DIT) - PRI D-137
D-137 Direct-In Termination (DIT) - PRI
General Description
This feature automatically routes incoming network exchange calls from an ISDN network and public/private
telecommunication network directly to a preselected station without Attendant assistance. The call can then be
processed by the called party. THREE-WAY CALLING [T-2], CALL TRANSFER - ATTENDANT [C-10], etc.,
are handled in the same manner as any normal trunk call.
Operating Procedure
The calling party, outside the system, dials the telephone number as usual. However, the call is answered directly at
a predetermined station, bypassing the ATTENDANT CONSOLE [A-3].
Service Conditions
1. Any group(s) of trunks can be used, up to the maximum capacity of the NEAX2400 IMX.
2. Bothway trunks can be used for DIRECT-IN TERMINATION, but incoming only trunks are
recommended.
3. It is not necessary to order special DID trunks to the telephone company as is required with DIRECT
INWARD DIALING [D-8]. However, care should be exercised in the application of Central Office trunk
hunting.
4. If the called station is busy, that call is kept ringing until the called station becomes idle, or is forwarded
to the ATTENDANT CONSOLE [A-3].
5. If there is no answer at a station, the calling party will continuously receive ringback tone. There is no
AUTOMATIC RECALL [A-8] to the Attendant in this case.
6. Once a call is answered, it can be processed by the called station like any normal trunk call.
7. If the station is assigned to a STATION HUNTING - CIRCULAR [S-7], STATION HUNTING -
SECRETARIAL [S-8], or STATION HUNTING - TERMINAL [S-9] group, the incoming call will follow
the hunt group station assignment. If the station is in a CALL FORWARDING - BUSY LINE [C-2],
CALL FORWARDING - DON’T ANSWER [C-3], or CALL FORWARDING - ALL CALLS 
[C-5] mode, the incoming call is connected to the call forward target station.
8. This feature is normally used where Direct-In service is required on a limited basis. The number of stations
thus serviced is effectively limited to the number of trunks available for DIRECT-IN TERMINATION.
9. DIRECT-IN TERMINATION and NIGHT CONNECTION - FIXED [N-1] are mutually exclusive.
10. DIT trunks can be programmed to terminate elsewhere in the Night mode.
11. When the system is in the Night mode of operation and the DIRECT-IN TERMINATION (DIT) station
is busy, the call diverts to TAS if provided; otherwise, the call waits on the busy station until it is idle.
12. Only one trunk can be arranged for DIRECT-IN TERMINATION to a particular station line.
13. The DIRECT-IN TERMINATION feature is limited to the following trunk types:
a.) CO
b.) automatic-in tie trunk
14. If the assigned station is busy when a call arrives, the call is held waiting. The call waiting tone is not
provided to the DIT station. The calling party hears the ringback tone.
15. The DIT call can terminate to a DO NOT DISTURB - D
term [D-11D] station. 
						

							NEAX2400 IMX ISDN Features and Specifications
Page 58NDA-24281, Issue 1
D-137 Direct-In Termination (DIT) - PRI
Service Conditions (cont’d)
16. The following connections are supported by this service (if the called station is the terminal in an external
exchange):
17. When the DIT station is busy, the incoming call is held waiting. In this case, if the DIT station belongs to
a Station Hunting group, the call follows the hunting assignment.
18. When a station in a different office is assigned as the DIT station, voice/data route selection is activated.
19. When assigning a station in a different office as the DIT station, Speed Calling list numbers are used in
system data assignment. 
DIT
Station
Calling
Pa r tyGeneral Trunk ISDN Trunk
General Trunk Available in current service Available in this service.
ISDN Trunk Available in current service Available in this service. 
						

							NEAX2400 IMX ISDN Features and Specifications
NDA-24281, Issue 1
Page 59
Elapsed Time Display - Dterm - PRI E-14D
E-14D Elapsed Time Display - Dterm - PRI
General Description
This feature provides an LCD display of the time elapsed while a Dterm is connected to a PRI trunk.
Operating Procedure
No manual operation is required.
Service Conditions
1. The elapsed time is displayed in the eight, left-side positions of the LCD display.
2. The elapsed time can reach a maximum of 9 hours, 59 minutes and 59 seconds. After that time the clock
returns to zero.
3. A continuous time display occurs during CONSULTATION HOLD - ALL CALLS [C-17] and THREE-
WAY CALLING [T-2].
4. When a call is transferred, the time display of the party receiving the transfer begins from zero.
5. When the D
term returns to the original call from CALL TRANSFER - ALL CALLS [C-11] or CALL
HOLD [C-6], the elapsed time begins at zero.
6. The elapsed time is not displayed when the station is in a specific condition such as:
a.) THREE-WAY CALLING [T-2]    
b.) Connected to a trunk with held trunk, as in the case of CONSULTATION HOLD [C-17] 
						

							NEAX2400 IMX ISDN Features and Specifications
Page 60NDA-24281, Issue 1
F-21 Flexible Numbering of Stations - PRI
F-21 Flexible Numbering of Stations - PRI
General Description
This feature provides the ability to assign telephone numbers of voice stations and data stations to any corresponding
instrument location, depending solely upon numbering plan limitations.
Operating Procedure
No manual operation is required.
Service Conditions
1. Careful consideration should be given to any numbering assignment, especially in larger systems, to avoid
the unnecessary loss of access codes or duplication of telephone numbers.
2. There is no limit on the number of groups that can be assigned per system.
3. Where TENANT SERVICE [T-12] is provided, telephone numbers cannot be duplicated between tenants.
4. A combination of one, two, three, four and five digit numbering may be used.
Example:
a.) 3  1
b.) 3  2  1
c.) 3  2  2  1
Examples a, b, c, can be assigned as three different stations. 
5. The system can distinguish the difference.
6. BUSY LAMP FIELD - FLEXIBLE [B-2] service can be provided only when the defining telephone
number digits exceed two. 
						

							NEAX2400 IMX ISDN Features and Specifications
NDA-24281, Issue 1
Page 61
Faulty Trunk Report - PRI F-26
F-26  Faulty Trunk Report - PRI
General Description
This feature allows a station to report a noisy or faulty ISDN trunk number by dialing a special access code before
hanging up. The FAULTY TRUNK REPORT consists of trunk number, telephone number, associated time division
switch and reported time. This information is displayed at the MAINTENANCE ADMINISTRATION TERMINAL
(MAT) [M-18] and/or fault printer.
Operating Procedure
To enter a FAULTY TRUNK REPORT
1. Switchhook flash before disconnecting; receive special dial tone.
2. Dial the FAULTY TRUNK REPORT access code; receive service set tone.
3. The MAT [M-18] records the FAULTY TRUNK REPORT and returns the line to the original connection.
Service Conditions
1. This feature can be accessed during any two-party connection.
2. The following information appears on FAULT TRUNK REPORT:
a.) Telephone number 
b.) Trunk route number 
c.) Trunk number 
d.) Time division switch 
e.) Time and date
3. Stations are assigned this feature according to CLASS OF SERVICE - INDIVIDUAL [C-15]
programming in system data.
4. When this feature is activated, a supervisory alarm (yellow) appears on the NEAX2400 IMX. 
						

							NEAX2400 IMX ISDN Features and Specifications
Page 62NDA-24281, Issue 1
H-14D Hands-Free Answer Back - Dterm - PRI
H-14D Hands-Free Answer Back - Dterm - PRI
General Description
This feature allows the user to respond to a VOICE CALL - Dterm [V-2D] without lifting the handset.
Operating Procedure
To answer a VOICE CALL [V-2D]
1. Press the MIC key; the LED lights.
2. Respond to the call hands-free.
Service Conditions
HANDS-FREE ANSWER BACK - Dterm - PRI can only be used when responding to a VOICE CALL [V-2D] on
the My-Line. 
						

							NEAX2400 IMX ISDN Features and Specifications
NDA-24281, Issue 1
Page 63
Hot Line-Outside - PRI H-15
H-15 Hot Line-Outside - PRI
General Description
This feature allows a user to access an outside ISDN destination party in the HOTLINE [H-1] service.
Operating Procedure
To place a HOT LINE - OUTSIDE - PRI call using a single line telephone
1. Station A lifts the handset; hears sender tone first, then ringback tone.
2. Outside party is rung.
3. Outside party lifts the handset; the conversation proceeds.
To place a HOT LINE - OUTSIDE - PRI call using BROKERAGE HOT LINE [B-12]
1. Station A presses the BROKERAGE HOT LINE feature key.
2. Station A lifts the handset or presses the SPEAKER key; hears sender tone first, then ringback tone.
3. Outside party lifts the handset; conversation proceeds.
Service Conditions
1. The number of hotline stations is limited by the number of stations accommodated in the system.
2. The destination parties for this service use abbreviated call codes prepared in SPEED CALLING -
SYSTEM [S-3]. Therefore, the number of destination stations is limited by the capacity of SPEED
CALLING - SYSTEM [S-3].
3. When a user is confronted with a situation in which all trunks are busy or all senders are busy at the same
time, reorder tone is heard at the hotline stations.
4. Outside connection in BROKERAGE HOTLINE - OUTSIDE [B-12] service can be realized when the
LCD indicates:
a.) Trunk classification such as DDD, Tie, and CCSA and trunk number for an outgoing call
b.) Time duration, trunk classification, and trunk number for an incoming call.
5. When a user of BROKERAGE HOTLINE - OUTSIDE [B-12] is confronted with a situation in which all
trunks are busy or all senders are busy, the user hears reorder tone. No indication is shown on the LCD of
the user’s D
term.
6. STATION MESSAGE DETAIL RECORDING (SMDR) [S-10] is available for outgoing calls with the
HOT LINE - OUTSIDE - PRI service. 
						

							NEAX2400 IMX ISDN Features and Specifications
Page 64NDA-24281, Issue 1
I-24 Incoming Call Identification - PRI
I-24 Incoming Call Identification - PRI
General Description
This feature allows an ATTENDANT CONSOLE [A-3] to visually identify the type of service and/or trunk group
arriving or waiting to be answered.
Operating Procedure
No manual operation is required.
Service Conditions
1. A flashing lamp indicates a call waiting to be answered.
2. A steady lamp indicates an answered call. 
3. A maximum of 12 lamp and key groups can be associated with INCOMING CALL
IDENTIFICATION-PRI.
4. Lamps and keys may be assigned as follows:
ATND: Attendant
BUSY: Call Forwarding - Busy Line
CCSA: Common Control Switching Arrangement
FX: Foreign Exchange
ICPT: Call Forwarding - Intercept
LDN: Listed Directory Number
NANS:  Call Forwarding - Don’t Answer
RECALL:    Recall
TF:     Inter Position Transfer
TIE:    Tie Line
WATS:  Wide Area Telephone Service
5. More than one INCOMING CALL IDENTIFICATION lamp can be duplicated at the ATTENDANT
CONSOLE [A-3]. The Attendant can select any incoming call by pressing the associated key.
6. Calls can be answered via the ANSWER key for first-in, first-out priority.
7. ATTENDANT CONSOLE [A-3] is limited to 12 unique INCOMING CALL IDENTIFICATION
indications. However, more than one incoming trunk group can be programmed for the same INCOMING
CALL IDENTIFICATION.