NEC Neax 2400 Imx Business Features And Specifications

							NEAX2400 IMX Business Features and Specifications
NDA-24221, Issue 3
Page 131
Call Waiting Lamp C-13
C-13 Call Waiting Lamp
General Description
This feature provides a visual indication to the Attendant when one or more calls are waiting to be answered.
Operating Procedure
Refer to the NEAX2400 IMX Office Data Specification. 
Service Conditions
1. All incoming calls to the ATTENDANT CONSOLE [A-3] that have to be answered will signal the
Attendant via the CALL WAITING LAMP.
2. The CALL WAITING LAMP can be set to flash at 60IPM only after “X” number of calls are waiting. “X”
can be anywhere from 1 to 15 calls waiting per TENANT [T-12].
3. In the case of MULTIPLE CONSOLE OPERATION [M-4], the CALL WAITING LAMP will light on
all consoles until one of the positions has processed the call(s).
4. Where TENANT SERVICE [T-12] is provided, the CALL WAITING LAMP will light only on the
console(s) of the called tenant.
5. In addition to the CALL WAITING LAMP indication, each console is provided with a two-digit display
that shows the number of calls waiting.
Interactions
1. The CALL WAITING LAMP lights if any of the following incoming calls are waiting to be answered at
the ATTENDANT CONSOLE [A-3]:
LDN Listed Directory Number
ATND Attendant Dial “0” Calls, CALL FORWARDING - ALL CALLS [C-5]
RECALL Attendant Recall Calls
FX Foreign Exchange
WATS Wide Area Telephone Service
TIE TIE Line Calls
BUSY Call Forwarding - Busy Line to Attendant
NANS Call Forwarding - Don’t Answer to Attendant
TF Inter Position Transfer
ICPT Call Forwarding - Intercept
CCSA Common Channel Switching Arrangement
2. In addition to the CALL WAITING LAMP, an audible buzzer is sounded whenever a call is waiting and
the Attendant is available to answer calls. The buzzer volume can be adjusted and silenced by operation
of a Volume Control key. If the Attendant is on a loop, a buzzer can be activated.
3. An indication of the type of calls waiting is given by the INCOMING CALL IDENTIFICATION [I-2]
feature.
4. When TENANT SERVICE [T-12] is used, the CALL WAITING LAMP will flash only on the console(s)
assigned to the called Tenant. The Tenant console is assigned in ATRK. The Route of the Tenants of the
individual trunks are assigned in ATRK as well. 
						

							NEAX2400 IMX Business Features and Specifications
Page 132NDA-24221, Issue 3
C-14 CCSA Access
C-14 CCSA Access
General Description
This feature enables connection to a CCSA network. CCSA networks provide customers with the use of a
completely private inter-facility dial system. They use individual facilities for dedicated access lines and trunks that
terminate in common control switching equipment and in various types of telephone equipment at customer
locations.
Operating Procedure
To place an outgoing CCSA call:
1. Lift the handset; receive dial tone.
2. Dial the CCSA ACCESS code; receive second dial tone.
3. Dial the desired number.
4. Wait for the call to be processed.
To answer an incoming CCSA call:
1. The Attendant presses either the CCSA or ANSWER key.
2. The call is extended to the desired station in normal fashion.
Service Conditions
1. CCSA trunks are physically the same as those used for tie trunks. The CCSA trunks may be push-button
or rotary in either direction.
2. Careful consideration should be given to system numbering plans before assigning CCSA ACCESS codes
to avoid numbering conflicts.
3. CCSA ACCESS codes can be either one or two digits.
4. Pad control can be used on a CCSA call. Refer to TIE LINE CONNECTION WITH PAD CONTROL [T-
5].
5. LEAST COST ROUTING - 3/6-DIGIT [L-5] may access a CCSA trunk group for off-net calling only.
6. Tandeming through on a CCSA network requires an Attendant and TRUNK-TO-TRUNK
CONNECTION [T-10]. 
						

							NEAX2400 IMX Business Features and Specifications
NDA-24221, Issue 3
Page 133
Class Of Service - Individual C-15
C-15  Class Of Service - Individual
General Description
This feature permits all NEAX2400 IMX stations to be assigned a Class of Service in accordance with the degree
of system use desired. Each station is assigned one class from each of three groups.
Operating Procedure
CLASS OF SERVICE - INDIVIDUAL is assigned via system data entry. Thereafter, each station is automatically
provided with the desired degree of service.
Service Conditions
1. The CLASS OF SERVICE - INDIVIDUAL feature in the NEAX2400 IMX contains three categories:
Telephone Equipment Class (TEC), Service Feature Class (SFC), and Route Service Class (RSC).
2. TEC determines the type of terminal and the signalling arrangement necessary.
3. Trunk Route Restriction Class provides 15 groups. Separate restriction patterns for each group are
programmed in System Data. Group RSC0 is reserved for ATTENDANT CONSOLE use only.
4. Fifteen types of Service Feature Classes are available for access to the following special service features.
These classes are assigned to each station in order to determine which features a particular station will be
permitted to use.
ATTENDANT CAMP-ON WITH TONE INDICATION [A-1]
CALL BACK [C-1]
CALL FORWARDING [C-2, C-3, C-5]
CALL HOLD [C-6]
DATA LINE SECURITY [D-12]
EXECUTIVE RIGHT-OF-WAY [E-1]
OUTGOING TRUNK QUEUING [O-2]
SMDR [S-10]
SPEED CALLING - SYSTEM [S-3]
TRUNK ANSWER FROM ANY STATION (TAS) [T-8]
For details, refer to the NEAX2400 IMX Office Data Specification.
5. Stations may be programmed to change SFC and RSC when the Attendant has set NIGHT CONNECTION
[N-1, 2]. This is accomplished via system data entry. For further information, refer to DAY/NIGHT
CLASS OF SERVICE [D-15].
6. TEC, RSC, and SFC are independent, with no interaction between them.
7. RSC and SFC can be assigned independently on a TENANT [T-12] basis.
8. The system software is capable of eliminating 5dB loss on station-to-station calls on a per-station basis.
9. The system software is capable of eliminating DISTINCTIVE RINGING [D-10] on a per-station basis (for
OPX stations).
10. RSC can be overridden by a new RSC, using the AUTHORIZATION CODE [A-20] feature.
Interactions
The following features interact with the fully restricted station:
1. CALL TRANSFER - ALL CALLS [C-11]: A fully restricted station can be transferred to a station or the
Attendant by another party using the CALL TRANSFER - ALL CALLS [C-11] feature. The fully
restricted station may transfer a station-to-station call to a station or the Attendant. 
						

							NEAX2400 IMX Business Features and Specifications
Page 134NDA-24221, Issue 3
C-15 Class Of Service - Individual
Interactions (cont’d)
2. CALL FORWARDING [C-2, 3, 5]: Station-to-station calls can be forwarded to a fully restricted station.
An attempt to forward an incoming trunk call to a fully restricted station will result in reorder tone.
3. STATION HUNTING [S-7, 8, 9]: Any call directed to a busy, fully restricted station will hunt to an
alternate station. Careful consideration is required when assigning a fully restricted station to a hunt group,
since incoming trunk calls directed to a fully restricted station will result in returning reorder tone.
4. TRUNK ANSWER FROM ANY STATION (TAS) [T-8]: An attempt by a fully restricted station to
answer a call via the TAS feature will result in reorder tone.
The following features interact with inward route restricted stations:
1. THREE-WAY CALLING [T-2]: When a user is restricted from receiving direct calls from a trunk group,
the user cannot be added to an established connection that includes the restricted trunk group.
2. CALL FORWARDING [C-2, 3, 5]: Incoming trunk calls cannot be forwarded to an inward route restricted
station.
3. CALL PICKUP [C-7, 30]: Incoming trunk calls cannot be answered by an inward route restricted station. 
4. ATTENDANT CAMP-ON [A-1]: This feature is denied on calls extended to an inward route restricted
station. Attempts will be routed to reorder tone.
5. STATION HUNTING [S-7, 8, 9]: Hunting of an incoming trunk call to an inward route restricted station
is not allowed.
6. TRUNK ANSWER FROM ANY STATION [T-8]: A user restricted from receiving direct incoming calls
via a given trunk group cannot use the TAS feature to answer calls received via that trunk group.
7. NIGHT SERVICE [N-1, 2]: Restrictions can be changed for a given station when the system is switched
to the night mode of operation; therefore, the assignment of an inward route restricted station as a night
station can be allowed (see DAY/NIGHT CLASS OF SERVICE [D-15].)
8. CODE CALLING ACCESS [C-21]/MEET ME PAGING [M-1]: Connection of an inward route restricted
line to an answer-back channel is not denied when the call is an incoming exchange call. 
						

							NEAX2400 IMX Business Features and Specifications
NDA-24221, Issue 3
Page 135
Consultation Hold - All Calls C-17
C-17  Consultation Hold - All Calls
General Description
This feature permits a user to hold any incoming or outgoing public network or TIE Line call, or any intra-office
call, while originating a call to another station within the system.
Operating Procedure
Holding the original call and placing the second call:
1. Press the switch hook; receive special dial tone.
2. The original call is held.
3. Dial the second telephone number; receive ringback tone.
4. The second station answers; the CONSULTATION HOLD state has been entered.
To return to the original call:
1. In any of the following cases, the calling station can return to the original call by pressing the switch hook:
a.) The second station called for CONSULTATION HOLD is busy.
b.) The calling station cannot gain access to second station because of restriction or any other reason.
c.) The second station does not answer.
2. If the second station hangs up, the calling station will be returned to the original call.
If the originating station flashes the switch hook, a THREE-WAY CALL [T-2] will be initiated.
Service Conditions
1. When TRUNK-TO-TRUNK CONNECTION [T-10] is provided with the system, an outgoing public
network or TIE Line call can be made by the user.
2. For outgoing calls, this feature may be activated only after 18 seconds have elapsed since the last digit
dialed.
3. CALL PICKUP - GROUP [C-7] is available on CONSULTATION HOLD.
4. A call can be forwarded to a station in the remote node via FCCS link.
Interactions
1. This feature is denied whenever the destination telephone set is engaged in any state other than a simple
2-party connection.
2. CONSULTATION HOLD-ALL CALLS must always be made available when service features require
switch hook flashing.
3. Indexes 156 and 157 also are used for SMDR, establishing an arbitrary connection timing.
4. If a party is involved in a CONSULTATION HOLD-ALL CALLS state or in an established THREE-
WAY CALLING [T-2] connection, attempts to override the connection are denied. These features are:
EXECUTIVE RIGHT-OF-WAY [E-1]
CALL WAITING - TERMINATE [C-12]
BUSY VERIFICATION [B-3]
ATTENDANT CAMP-ON WITH TONE INDICATION [A-1]
ATTENDANT OVERRIDE [A-7] 
						

							NEAX2400 IMX Business Features and Specifications
Page 136NDA-24221, Issue 3
C-17 Consultation Hold - All Calls
Interactions (cont’d)
5. Features that cannot be activated while a user has a party in CONSULTATION HOLD-ALL CALLS are:
EXECUTIVE RIGHT-OF-WAY [E-1]
TRUNK ANSWER FROM ANY STATION [T-8]
CALL BACK, Activate or Cancel [C-1]
CALL PICKUP-DIRECT [C-30]
CALL FORWARDING, Activate or Cancel [C-2, 3, 5]
OUTGOING TRUNK QUEUING, Cancel [O-2]
SPEED CALLING-INDIVIDUAL, Entry [S-21]
MESSAGE REMINDER [M-19D]
6. All other features may be activated as long as the user’s line CLASS OF SERVICE-INDIVIDUAL [C-15]
allows that feature.
7. Upon establishing a CONSULTATION HOLD-ALL CALLS connection and dialing a third party, if the
user receives busy or reorder tone instead of ringback tone, the user flashes once to disconnect the tone
and reconnect the second party.
8. Upon establishing a CONSULTATION HOLD-ALL CALLS connection and dialing a
MISCELLANEOUS TRUNK ACCESS [M-2] code, if no dial tone is given (after the trunk is seized), or
if a mistake is made in dialing, or if intercept announcement or a permanent tone is given, the user must
go on-hook and wait for ringback tone.
9. A user, who established CONSULTATION HOLD-ALL CALLS, is reconnected to the party in soft hold
when the third party disconnects.
10. When using CALL TRANSFER-ALL CALLS [C-11] from a station (second party) to another station or
trunk (third party), the control station can transfer the call during ringing (blind transfer). When the control
station goes on-hook, the station in soft hold is connected to the third party’s connection and hears
ringback tone. A 30-second timer is set when the controlling station goes on-hook. If the timer times out
before the third party answers, the control station will receive ringback tone.
11. Reorder tone is returned to the station using CONSULTATION HOLD-ALL CALLS when the following
actions occur:
 The user attempts to place an off-net call using MISCELLANEOUS TRUNK ACCESS [M-2] on a
restricted route.
 The user dials the number of an unassigned station or station residing in an inaccessible tenant via
Tenant Service.
 The user dials vacant or invalid first digit (no assignment in the ANPD command either for level or
connection status).
 The TRANSFER key or FLASH BUTTON-D
term [F-3D] is used instead of momentarily pressing the
switch hook. A FLASH BUTTON-Dterm [F-3D] is required for a Connection Index of B, Busy. 
						

							NEAX2400 IMX Business Features and Specifications
NDA-24221, Issue 3
Page 137
Consultation Hold - All Calls - DtermC-17D
C-17D  Consultation Hold - All Calls - Dterm
General Description
This feature permits a Dterm user to hold any incoming or outgoing public network or TIE Line, or any Intra-office
calls, while originating a call to another station within the system.
Operating Procedure
To hold original call and place second call from a Dterm:
1. Press the TRANSFER key; receive special dial tone.
2. The original call is held.
3. Dial the second telephone number; receive ringback tone.
4. The second station answers; the CONSULTATION HOLD state has been entered.
To return to the original call from a Dterm:
1. In any of the following cases, the calling station can return to the original call by pressing the TRANSFER
key:
a.) Second station called for consultation is busy.
b.) Calling station cannot gain access to the second station because of a restriction or some other
reason.
2. If the second station hangs up, the calling station will be returned to the original call.
3. If the second station stays on, pressing the TRANSFER key returns the original call to the D
term while the
second call is being held.
By pressing the CONF key, a THREE-WAY CALL [T-2] will be initiated.
Service Conditions
1. When TRUNK-TO-TRUNK CONNECTION [T-10] is provided with the system, an outgoing public
network or TIE Line call may be made by the user.
2. With outgoing calls, this feature may be activated only after 18 seconds have elapsed since the last digit
was dialed.
3. CALL PICKUP-GROUP [C-7] is available on CONSULTATION HOLD.
4. A call can be forwarded to a station in the remote node via FCCS link.
Interactions
1. This feature is denied whenever the destination telephone set is engaged in any state other than a simple
2-party connection.
2. CONSULTATION HOLD-ALL CALLS must always be made available when service features require
switch hook flashing.
3. Indexes 156 and 157 also are used for SMDR, establishing an arbitrary connection timing.
4. If a party is involved in a CONSULTATION HOLD-ALL CALLS state or in an established THREE-
WAY CALLING [T-2] connection, attempts to override the connection are denied. These features are:
EXECUTIVE RIGHT-OF-WAY [E-1]
CALL WAITING - TERMINATE [C-12]
BUSY VERIFICATION [B-3]
ATTENDANT CAMP-ON WITH TONE INDICATION [A-1]
ATTENDANT OVERRIDE [A-7] 
						

							NEAX2400 IMX Business Features and Specifications
Page 138NDA-24221, Issue 3
C-17D Consultation Hold - All Calls - Dterm
Interactions (cont’d)
5. Features that cannot be activated while a user has a party in CONSULTATION HOLD-ALL CALLS are:
EXECUTIVE RIGHT-OF-WAY [E-1]
TRUNK ANSWER FROM ANY STATION [T-8]
CALL BACK, Activate or Cancel [C-1]
CALL PICKUP-DIRECT [C-30]
CALL FORWARDING, Activate or Cancel [C-2, 3, 5]
OUTGOING TRUNK QUEUING, Cancel [O-2]
SPEED CALLING-INDIVIDUAL, Entry [S-21]
MESSAGE REMINDER [M-19D]
6. All other features may be activated as long as the user’s line CLASS OF SERVICE-INDIVIDUAL [C-15]
allows that feature.
7. Upon establishing a CONSULTATION HOLD-ALL CALLS connection and dialing a third party, if the
user receives busy or reorder tone instead of ringback tone, the user flashes once to disconnect the tone
and reconnect the second party.
8. Upon establishing a CONSULTATION HOLD-ALL CALLS connection and dialing a
MISCELLANEOUS TRUNK ACCESS [M-2] code, if no dial tone is given (after the trunk is seized), or
if a mistake is made in dialing, or if intercept announcement or a permanent tone is given, the user must
go on-hook and wait for ringback tone.
9. A user, who established CONSULTATION HOLD-ALL CALLS, is reconnected to the party in soft hold
when the third party disconnects.
10. When using CALL TRANSFER-ALL CALLS [C-11] from a station (second party) to another station or
trunk (third party), the control station can transfer the call during ringing (blind transfer). When the control
station goes on-hook, the station in soft hold is connected to the third party’s connection and hears
ringback tone. A variable timer is set when the controlling station goes on-hook. If the timer times out
before the third party answers, the control station will receive ringback tone.
11. Reorder tone is returned to the station using CONSULTATION HOLD-ALL CALLS when the following
actions occur:
 The user attempts to place an off-net call using MISCELLANEOUS TRUNK ACCESS [M-2] on a
restricted route.
 The user dials the number of an unassigned station or station residing in an inaccessible tenant via
Tenant Service.
 The user dials vacant or invalid first digit (no assignment in the ANPD command either for level or
connection status).
 The TRANSFER key or FLASH BUTTON-D
term [F-3D] is used instead of momentarily pressing the
switch hook. A FLASH BUTTON-Dterm [F-3D] is required for a Connection Index of B, Busy. 
						

							NEAX2400 IMX Business Features and Specifications
NDA-24221, Issue 3
Page 139
Centralized Attendant Service (CAS) C-20
C-20  Centralized Attendant Service (CAS)
General Description
For applications requiring multiple sites, but having common interests or operation, the NEAX2400 IMX can
operate in a Main (attended) or Satellite (unattended) configuration. Typically, incoming calls to the satellite are
routed to the main location for processing by the Central Attendant(s) within the CAS network. This service feature
can be used to improve overall communication efficiency.
Operating Procedure
Listed Directory Number (LDN) Call: 
1. Upon arrival of an LDN call at a satellite system, the LDN call is automatically directed to the main system
via a release link trunk.
2. Upon receiving the incoming CAS call, the ATTENDANT CONSOLE(s) [A-3] will display the incoming
CAS call by flashing the CAS lamp.
3. The Attendant answers the incoming CAS call by pressing the CAS or ANSWER key; hears the Incoming
Call Tone (480 Hz - 440 Hz - 480 Hz) for 300 msec.
4. The Attendant presses the SHF key causing a switch hook flash; hears special dial tone from the satellite
system.
5. The Attendant dials the required telephone number in the satellite system.
6. Upon hearing ringback tone, the Attendant presses the RELEASE key to make the release link trunk
available to serve another call.
Recall on Dont Answer Call: 
1. A satellite system is arranged to re-establish a connection from a calling party via a release link trunk to
an Attendant in the main system, if the called station does not answer within a prefixed time.
2. Upon receiving the recall on a No Answer Call, the ATTENDANT CONSOLE(s) [A-3] will display the
incoming CAS call by flashing the CAS lamp.
3. The Attendant answers the incoming CAS call by pressing the CAS or ANSWER key; hears continuous
ringback tone (440Hz - 480 Hz) for 300 msec.
4. After hearing the burst of continuous ringback tone, the Attendant and the calling party converse over
ringback tone because of ringing the called station continuously during recall connection.
5. If the calling party desires to hold the connection, the Attendant presses the RELEASE key to make the
release link trunk available to serve another call.
Camp-on:
1. If the Attendant directs the satellite system to connect a call to a busy station, the satellite system transmits
a Camp-On confirmation tone (100 msec burst of 440 Hz) to the Attendant, also a Camp-On Indication
Tone (200 msec burst of 480 Hz) to the called station, and reconnects the calling party to the Attendant.
2. If the calling party desires to wait, the Attendant presses the RELEASE key to make the release link trunk
available to serve another call.
3. If the Camped-On station remains busy for longer than the prefixed time, the satellite system reconnects
the calling party via a release link trunk.
4. Upon receiving the recall on a Camped-On call, the ATTENDANT CONSOLE(s) [A-3] will display the
incoming CAS call by flashing the CAS lamp.
5. The Attendant answers the incoming CAS call by pressing the CAS or ANSWER key; hears the Camp-
On Identification Tone (100 msec burst of 440 Hz).
6. When the Camped-On station becomes idle, the satellite system rings the camped-on station. 
						

							NEAX2400 IMX Business Features and Specifications
Page 140NDA-24221, Issue 3
C-20 Centralized Attendant Service (CAS)
Operating Procedure (cont’d)
Remote Hold:
1. The Attendant converses with a central office party.
2. The Attendant operates the SHF key; hears special dial tone.
3. The Attendant dials the Remote Hold access code (one or two digits); the central office party is placed in
the hold state at the satellite system, and the Attendant hears the hold confirmation tone (five, 50 msec.
bursts of 440 Hz).
4. The Attendant presses the RELEASE key to make the release link trunk available to serve another call.
5. If the central office party remains in the hold state for longer than the prefixed time, the satellite system
reconnects the central office party via the release link trunk.
6. Upon receiving the recall on the hold call, the ATTENDANT CONSOLE(s) [A-3] will display the
incoming CAS call by flashing the CAS lamp.
7. The Attendant answers the incoming CAS call by pressing the CAS or ANSWER key; hears the hold recall
identification tone (five, bursts of 440 Hz).
8. The Attendant is now able to complete the call.
Operator Call:
1. When an operator call code (one or two digits) is received from a station or TIE Line trunk in the satellite
system, an operator call is directed to the main system via release link trunks.
2. Upon receiving the incoming CAS call, the ATTENDANT CONSOLE(S) [A-3] will display the incoming
CAS call by flashing the CAS lamp.
3. The Attendant answers the incoming CAS call by pressing the CAS or ANSWER key; hears the operator
call identification tone (two, 100 msec. bursts of 440 Hz).
4. At the expiration of this tone, the Attendant converses with the calling party.
5. The Attendants procedure for serving this call is similar to that for an LDN call.
Call Transfer - Attendant:
1. After any call is completed to a satellite station, the called party station can call the Attendant in the main
system to transfer the calling party to another station in the satellite system. The operation of this feature
is similar to that of an operator call.
2. The Attendant answers the incoming CAS call by pressing the CAS or ANSWER key; hears the operator
call identification tone (two, 100 msec. bursts of 440 Hz).
3. After answering the call, the Attendant presses the SHF key, causing the satellite system to disconnect the
station that dialed the operator call code and connects to the calling party.
Night Service for the Incoming CAS Call in the Main System:
1. In night mode, the incoming CAS call is directed to a night station to be answered.
2. When the night station answers that call, the night station hears the identification tone depending on the
call.
3. The night station momentarily switch hook flashes; hears the special dial tone from the main system.
4. Dials the Flash Signal Sending access code (one or two digits); hears special dial tone.
5. After this, the operation of the night station is similar to that of the Attendant.
6. The night station must be provided with DTMF signaling.
Service Conditions
The following applies to a NEAX2400 IMX used at the main CAS location (Attendant location):
1. The number of Release Link Trunks (RLTs) is determined by overall satellite to main location traffic
requirements.