NEC Neax 2400 Ipx Isdn Features And Specifications

							NEAX2400 IPX ISDN Features and Specifications
Page 66NDA-24311, Issue 1
I-26 Indialing Through Main - PRI
I-26  Indialing Through Main - PRI
General Description
With this feature, a call destined for a satellite PBX via DID or Network Inward Dialing (NID) will automatically
be routed to the satellite station by the main PBX over a tie trunk.
Operating Procedure
1. A four-digit number is received via DID or NID at a main PBX.
2. One or more sets of 1,000 digits or more are designated for each satellite location. A main PBX checks
the digits and routes the call over a tie trunk to the appropriate satellite.
3. The other three digits are then transmitted to the satellite, where the call is switched to the proper station.
4. When a satellite PBX is assigned more than 1,000 digits, each set of 1,000 digits refers to a separate trunk
group; while each trunk group is assigned to a separate incoming switch.
5. When a NEAX2400 IPX is used as a main PBX, the thousands of digits may be deleted or left intact when
the dialed digits are pulsed out to the satellite. All four digits can be transmitted to a satellite. A system
can also employ separate trunk groups for each 1,000 digits assigned to a satellite.
Service Conditions
None.
Satellite 
OfficeMain 
Office
TRK DID/NID Call 
						

							NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 67
Inter-PBX Coordinated Station Numbering Plan - PRI I-27
I-27  Inter-PBX Coordinated Station Numbering Plan - 
PRI
General Description
The INTER-PBX COORDINATED STATION NUMBERING PLAN - PRI feature enables the main-satellite
network to coordinate the numbering plan for stations in the network. This feature allows a station at one switch to
call a station at another switch by dialing a unique three- to seven-digit number with no access codes or pauses for
dial tone.
This feature can also be arranged to provide a centralized exchange network capability, which channels access to
and from the public network through a single NEAX2400 IPX switch in the coordinated group.
Operating Procedure
This feature is used for the main/satellite configuration and may also be provided with main/tributary configuration.
Stations at the main and satellite can dial each other without an intervening dial tone. The dialing plan for an inter-
PBX call is the same as for an intra-PBX call. With this arrangement, different initial digits are assigned to stations
on different systems.
Inter-PVX Coordinated Station Numbering Plan
All switches have a coordinated station numbering feature. (See the figure above.)
Example 1: A user at the satellite switch dials 5XXX to call a station at the main switch.
Example 2: A user at the main switch dials 3XXX to call a station at the satellite switch and 4XXX to call a station
at the tributary switch.
Access PRI 
Trunk
5XXX
Tie TrunksMain
PBX
3XXX 4XXX
Satellite PBX Tributary PBXAttendant 
						

							NEAX2400 IPX ISDN Features and Specifications
Page 68NDA-24311, Issue 1
I-27 Inter-PBX Coordinated Station Numbering Plan - PRI
Interactions
1. LEAST COST ROUTING (LCR) - 3/6-DIGIT PRI [L-31]: The first codes for INTER-PBX
COORDINATED STATION NUMBERING calls must be distinct from the assigned LCR access codes.
INTER-PBX COORDINATED STATION NUMBERING calls are routed independently of EPN calls.
The routing patterns are shared by both LCR and INTER-PBX COORDINATED STATION
NUMBERING.
2. UNIFORM NUMBERING PLAN (UNP) [U-4]: INTER-PBX COORDINATED STATION
NUMBERING - PRI can be integrated with the EPN UNIFORM NUMBERING PLAN calls. For
example, a five-digit coordinated telephone number may also be the same as the last five digits of a seven-
digit UNP number. 
						

							NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 69
Inter-Office Off-Hook Queuing - PRI I-36
I-36 Inter-Office Off-Hook Queuing - PRI
General Description
This feature can be employed in a main-satellite configuration to allow a satellite user to queue for LEAST COST
ROUTING - 3/6-DIGIT - PRI [L-31] at the main location. This feature can also be used when all outgoing ISDN
trunks are concentrated at the main location.
Operating Procedure
Operation at the main location
1. The main location receives dialed digits from the satellite location via ISDN trunk (a TANDEM TIE
TRUNK [T-1]).
2. The main location determines that no ISDN trunks are available and places the call in an available Hold
on Queue.
3. The main location returns service set tone to the satellite caller.
4. The satellite caller remains off-hook, and waits for the call to be completed. (When an ISDN trunk
becomes available, the satellite caller is connected.)
5. If there are no Hold on Queues available, the main location returns reorder tone to the satellite caller.
6. If the satellite caller goes on-hook (ISDN trunk releases) while in queue, the assigned Hold on Queue is
cleared.
Service Conditions
1. This feature is usually used in conjunction with LEAST COST ROUTING - 3/6-DIGIT - PRI [L-31].
2. There is a maximum of 32 Queuings per Module Group (MG) available in the system. Therefore, only 32
stations/MG can use OFF-HOOK QUEUING [O-7], - PRI [O-28], OUTGOING TRUNK QUEUING
[O-2], and - PRI [O-24] simultaneously.
3. If the incoming tie trunk is a loop signal trunk, the caller will hear service set tone while waiting in queue
for a maximum of 3 minutes. After this period, the trunk automatically will be released.
4. When an ISDN trunk becomes available, the dialed number is automatically sent to the connecting Central
Office.
5. If all Off-Hook Queuing slots are in use, reorder tone (fast busy tone) is sent to the satellite office.
6. The connecting patterns available for this service are as follows:
a.) Non-ISDN trunk to ISDN trunk
b.) CCIS trunk to ISDN trunk
c.) ISDN trunk to Non-ISDN trunk
d.) ISDN trunk to CCIS trunk
e.) ISDN trunk to ISDN trunk
7. In case a call terminates to ISDN trunk, billing starts when the call is placed in a queue. 
						

							NEAX2400 IPX ISDN Features and Specifications
Page 70NDA-24311, Issue 1
L-31 Least Cost Routing - 3/6-Digit - PRI
L-31  Least Cost Routing - 3/6-Digit - PRI
General Description
This feature allows the NEAX2400 IPX to be programmed to route outgoing calls over the most economical facility
(WATS, FX, DDD). Based on the area code and office code dialed (6-digit analyzing), the system examines the
programming tables and chooses the facilities in the order specified. This service is the only way to access PRI
interface into ISDN.
Operating Procedure
1. Lift the handset; receive dial tone.
2. Dial the access code (usually 9); receive second dial tone.
3. Dial the area code, office code and telephone number.
4. The system automatically completes the call via the most economical route.
Service Conditions
A step-by-step explanation that, when reviewed in conjunction with the following figure, provides a clearer
understanding of how the NEAX2400 IPX switch accomplishes Least Cost Routing follows:
1. If dialing a toll or local call (NPA-NXX-XXXX or NXX-XXXX), routing begins with translation of three-
digit (NPA or NXX) area or office code. In the case of specific numbers, this translation can result in the
immediate selection of the three-digit routing patterns. If the number dialed is an NPA and six-digit
translation is required, the NXX code is verified in the SCC (XX) or the FX (XX) Table (Note 1 and Note
2). If the NXX is not located in either table, see number 3. There is a maximum of 256 Outgoing Pattern
Routing (OPR) Tables with a maximum of 8 routes for selection.
Note 1:SCC (XX) is the Special Common Carrier NXX Translation Table.
Note 2:FX (XX) is the FX NXX Translation Table.
2. First choice route option in an NPA pattern will most often be a Specialized Common Carrier. If a trunk
is available in this group, further digit translation will be required to determine whether the called number
is served by the carrier. NXX digit translation will also be required in instances where a call is routed over
a tie or FX trunk. For these purposes, 256 NXX patterns are available.
3. In the case of Specialized Common Carriers, associated NXX patterns return either a YES or NO answer
to the switch, indicating whether the dialed number is within the designated service area of the selected
SCC. If service is available, the switch seizes the trunk and completes the connection. If the NO answer
is returned, the switch searches for the next available trunk group.
4. Calls routed over FX trunk groups may require outpulsing of prefix digit 1, depending upon the NXX
number dialed. For this purpose, another group of associated NXX patterns can be used, operating on the
same YES/NO principle. A YES answer returned to the switch will result in prefix 1 being added
automatically before sending digits to the called central office.
5. When the selected route is an FX trunk group, NXX translation can be used to either allow or disallow the
connection. This is accomplished via YES/NO answer from a designated group of NXX patterns, and
enables calls to selected central office areas to be effectively restricted to the most economical routes. 
						

							NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 71
Least Cost Routing - 3/6-Digit - PRI L-31
Service Conditions (cont’d)
The routing method outlined provides some of the most flexible options available for call routing, and
functions as a highly effective method of cost control.
3/6-Digit Least Cost Routing Translation Table
2--------------------9
00
99
2--------------------9
2--------------------9 2--------------------900
99
00
99 00
99
YES/NO
YES/NOYES/NO
SCC (XX) TABLEFX PREFIX TABLEFX (XX) TABLE
256
NXX Translation
TableSCC (XX) TABLE 256
OPR
Table
DIALED NUMBER 0 - NPA - NXX - XXXX
NPA or NXX
Note X = 1 - 256
OPR (X) 
Note
SCC1
BAND 5
BAND 3
BAND 2
DDDFX
SCC2
BAND 5
BAND 3
DDD 1 
						

							NEAX2400 IPX ISDN Features and Specifications
Page 72NDA-24311, Issue 1
L-31 Least Cost Routing - 3/6-Digit - PRI
Service Conditions (cont’d)
6. In certain cases, three- and six-digit translation provides sufficient information for identification of the
service area. Up to 256 separate Outgoing Routing Patterns are provided for this.
7. Up to eight trunk routes can be in each Outgoing Routing Pattern.
8. STATION MESSAGE DETAIL RECORDING (SMDR) [S-10] may be used in conjunction with LEAST
COST ROUTING - 3/6-DIGIT - PRI. The route selected by the switch will be recorded by the STATION
MESSAGE DETAIL RECORDING (SMDR) [S-10] unit.
9. Tie Lines can be included in route patterns.
10. Application of NXX patterns provides for inclusion of multiple common carriers serving different areas.
11. When a tie trunk requiring an off-net connection to the local central office is included as a route option,
the NEAX2400 IPX can provide a 2.8 second prepause before sending out the selecting signal.
12. Senders (dial pulse or tone) are provided with this feature for dialing.
13. Pre-translation capability minimizes waiting time after dialing. After enough digits are collected to
determine a route, the system starts outpulsing before the station completes dialing the entire called
number.
14. When LEAST COST ROUTING - 3/6-DIGIT - PRI is provided, the Attendant cannot pass dial tone to a
station. The desired number must be dialed by the Attendant.
15. Stations having different Route Restriction Classes, but using the same LEAST COST ROUTING - 3/6-
DIGIT - PRI pattern, can be denied access to the last choice trunk route(s) in that pattern. Route Restriction
Classes can be set up so that a station dialing an area code can use WATS, FX, and DDD; or only the
WATS line, if such an arrangement is desired. This is a form of forced Least Cost Routing.
16. NXX patterns can be programmed to restrict all stations in the system from completing calls to specific
NXX numbers over FX trunks.
17. The system includes the ability to detect a dialed DDD number and compare it with a DDD list table to
determine if the call is directed to a facility served by the trunk network. If the dialed number is found in
the DDD list table, a translation is provided to the seven-digit, on-net number (ABC-XXXX) served by
the tie trunk. This allows an expensive public network dialed number to be trapped and automatically be
diverted to an available leased facility. If a Tie Line is not available, the call is routed as dialed.
18. The NEAX2400 IPX is capable of converting a maximum of 24 receiving digits into a required 24-digit
number entirely. An interdigit pause can be inserted whenever necessary. This provides for an extremely
flexible numbering plan for a complex network.
19. CALL-BY-CALL SERVICE SELECTION [C-105] is available on a trunk provisioning basis. 
						

							NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 73
LCR - Time of Day Routing - PRI L-32
L-32  LCR - Time of Day Routing - PRI
General Description
This feature provides automatic routing of outgoing ISDN calls over alternative customer facilities based on the
DDD number. The system will select the most economical route available at the time of connection. The pattern of
alternate routing can be changed up to eight times per day based on a prearranged time schedule.
Operating Procedure
1. Lift the handset; receive dial tone.
2. Dial the access code (usually 9); receive second dial tone.
3. Dial the area code, office code, and telephone number.
4. The system automatically completes the call via the most economical route available.
Service Conditions
1. A maximum of eight patterns can be provided during a 24-hour interval for LCR - TIME OF DAY
ROUTING - PRI.
2. Each pattern can be programmed at a maximum increment of 30 minutes. 
						

							NEAX2400 IPX ISDN Features and Specifications
Page 74NDA-24311, Issue 1
L-33 LCR - Attendant Manual Override - PRI
L-33  LCR - Attendant Manual Override - PRI
General Description
This service feature provides an ATTENDANT CONSOLE [A-3] to override the LCR - TIME OF DAY ROUTING
- PRI [L-32] pattern, then an alternate routing pattern group will be selected.
Operating Procedure
To set LCR - ATTENDANT MANUAL OVERRIDE - PRI
1. Press an idle loop key.
2. Dial the LCR - ATTENDANT MANUAL OVERRIDE access code; receive special dial tone.
3. Dial the LCR - TIME OF DAY ROUTING pattern number (1 to 7); receive service set tone.
4. Press the RELEASE key.
To cancel LCR - ATTENDANT MANUAL OVERRIDE - PRI
1. Press an idle loop key.
2. Dial the LCR - ATTENDANT MANUAL OVERRIDE access code; receive special dial tone. The display
of the LCR - TIME OF DAY ROUTING pattern number is shown.
3. Dial 0 to cancel; receive service set tone.
4. Press the RELEASE key.
Service Conditions
LCR - ATTENDANT MANUAL OVERRIDE - PRI takes precedence over LCR - CLOCKED MANUAL
OVERRIDE - PRI [L-35]. 
						

							NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 75
LCR - Automatic Overflow to DDD - PRI L-34
L-34  LCR - Automatic Overflow to DDD - PRI
General Description
This feature provides optional routing of ISDN network calls via off-network facilities from a point on the network
where all on-network routes are busy or none are provided.
Operating Procedure
No manual operation is required.
Service Conditions
1. Off-net facilities available include Wide Area Telephone Service (WATS) [W-1], Foreign Exchange (FX)
and/or Central Office trunk groups.
2. Off-network routes are listed in the LEAST COST ROUTING - 3/6-DIGIT - PRI [L-31] tables (Outgoing
Routing Patterns, OPR).
3. The NEAX2400 IPX converts the on-network destination code to either a Listed Directory Number (LDN)
for Attendant assistance calls, or to a DIRECT INWARD DIALING (DID) number (where appropriate)
for station calls.
4. If no on-network routes are provided to a given destination, up to eight off-network routes may be
assigned.