ATT System 25 Reference Manual

							Night Service
Tie Trunks: Dial-in Tie Trunks cannot be given night service treatment.
Administration Requirements
Trunk Ports:
l Assign trunk Class of Service with Night Service (8-15).
Note:A Remote Access trunk must not be administered for either form of
Night Service treatment.
l Assign Directed Night Service trunk (yes or no; default = yes).
Voice Terminal Port:
l Directed NS
— Add Night Service trunk number to station list.
l Assign External Alert for TAAS NS
Attendant Console (Voice Terminal) Port:
l Night Service is defaulted to a button on the first Direct Trunk Attendant Console
only. On a second Direct Trunk Console or on a Switched Loop Attendant Console,
assign Night Service to a flexible button.
l Assign Night Service Access Code
Hardware Requirements
TAAS NS requires an associated external alert (such as a bell). Each alert requires a port on
a ZTN78 Tip Ring Line or a TN742 Analog Line CP. Refer to the “External Alerts” feature
description for detailed information and a connection diagram.
2-239 
						

							FEATURES AND SERVICES
Night Service Delay Announcements
Description
This feature provides a recorded announcement forincoming trunk calls when the system
has Directed Night Service (NS) activated and a call is not answered.
Directed NS calls not answered within a specified number of rings (1-15) may be directed to
a recorded announcement. Two different recorded announcements may be assigned.
Note that NS calls to a terminal that are not answered do not receive Station Hunting or
Coverage treatment (unless the trunk also appears on a station’s Personal Line button).
After the announcement is played, the call is disconnected.
Considerations
Night ServiceDelay Announcements
acknowledges the call and can provide
to the delay announcement, the call
announcement has been played.
Interactions
provide the calling party with a message that
additional information as well. Once a NS call goes
will be disconnected from the system after the
The following feature interacts with Night Service DelayAnnouncements.
Night Service:Incoming calls receiving TAAS NS treatment will not activate the delay
announcements. Only trunks that receive Directed NS will activate these announcements.
Administration Requirements
Special Feature Ports:
l    Assign first Night Service delay announcement (code 251).
l    Assign second Night Service delay announcement (code 252).
lAssign number of rings before Night Service delay announcement (0-15).
Station Ports:
l    Assign port circuits (ZTN78 or TN742) for each recorded announcement.
2-240 
						

							Night Service Delay Announcements
Hardware Requirements
A suitable announcement machine is required for each announcement and must be
connected to a port on a ZTN78 Tip Ring Line (or TN742 Analog Line) CP.
The system supports two Directed Night Service delay announcements.
Detailed connection information is provided in Figure 2-35.
Descriptions of the SIP (Station Interconnect Panel), TAE (Trunk Access Equipment), and
associated cables and adapters, as shown on the figures, are provided under the heading
“Connectivity” in Section 4.
SYSTEM 25
CABINET
PART OF
OCTOPUS
PART OF
CABLE
SIP
TN742
C2
SIPW1>C5DELAY
ORADAPT.B1> ANNOUNCEMENT
ZTN78EQUIPMENT
LEGEND:
TN742 -ANALOG LINE CP
ZTN78- TIP RING CP
B1- TYPICAL-103A CONNECTING BLOCK*
C2 - OCTOPUS CABLE (WP90780) - PEC 2720-05P
C5 - MODULAR CORD (D4BU-87)
W1- 4-PAIR INSIDE WIRING CABLE*
*- FURNISHED BY INSTALLER
Figure 2-35.
Delay Announcement Equipment Connections (FCC Registered)
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							FEATURES AND SERVICES
Off-Premises Stations (OPS)
Description
An Off-Premises Station (OPS) is a single-line voice terminal that is located in another
building and connected to System 25 via arrangements with the local CO. The station has
the same features as an on-premises single-line station except that it is counted as an
outside party in a conference call.Also, the Message feature will not operate with these
sets.
Considerations
This service is sometimes furnished to executives at their residences. It allows them remote
access to System 25 features and services.
Interactions
The following features interact with Off-Premises Stations.
Conference: For conference purposes, an OPS counts as one of the two allowable outside
lines.
Distinctive Ringing:Distinctive Ringing is not provided; OPS stations will always receive
standard (that is, single) ringing for calls.
Administration Requirements
Single-Line Voice Terminal Port:
l Assign port on Analog Line (TN742) or DS1 Interface (TN767) CP.
l Make This an Extended Station (yes or no; default = no). (This is how the system
knows the station is an OPS.)
Hardware Requirements
Requires a port interface on a TN742 Analog Line CP or TN767 DS1 Interface CP.
The OPS must be a FCC registered single-line voice terminal.
Connectivity information is provided in Section 4, “Hardware Description.”
2-242 
						

							Out-of-Building Stations
Out-of-Building Stations
Description
Single-line voice terminals and multiline 7300H series terminals may be directly connected to the
system even though they are not located in the same building. For 7300H series terminals, special
In-Range Out-of-Building (IROB) units are used to protect the switch and its users from lightning,
power crosses, etc. Out-of-Building Stations can access all system features.
Considerations
Single-line voice terminals may be located at distances up to 24000 feet from the system cabinets.
Carbon protection devices are required for lightning and power cross protection.
Multiline voice terminals must be located within 2000 feet of the system cabinets (local power is
always required) and must have IROB protection devices. MET sets may not be used for Out-of-
Building service.
Hardware Requirements
Out-of-Building multiline voice terminals require IROB units. Single-line voice terminals require
carbon protection devices and must be connected to ports on the TN742 or TN746 Analog Line CP.
Connectivity information is provided in Section 4, “Hardware Description.”
November 19952-243 
						

							Features and Services
Paging System Access
Description
This feature provides users with dial access or feature button access to paging equipment.
System 25 can provide an interface to paging systems that require a ground start trunk port, a loop
start trunk port, or an industry-standard tip/ring station line port. The exact interface depends upon
the paging system’s requirements. System 25 can also support single-zone, simple amplifier type
paging systems that require contact closure (the equivalent of a push-to-talk button) by using a
paging system adapter, or by using a special Auxiliary Trunk CP (TN763) with its supporting
hardware.
A single-line, multiline voice terminal, or ATL cordless telephone user (including the attendant) can
access paging equipment by dialing the appropriate paging system access code. Depending upon
the capabilities and options of the paging system it may be necessary to dial individual zones once
the paging equipment has been accessed. (A zone is a number of paging loudspeakers that form a
logical group. A zone might include all of the loudspeakers in a given room, or all of the
loudspeakers in all of the areas of a building that share a common function. For example, all of the
loudspeakers on a factory floor might be grouped into one zone, while all of the loudspeakers in all
of the conference rooms might be grouped into another zone.)
In most modern paging systems, paging zones are provided by the paging equipment and selected
by passing dial codes to the paging equipment. If you want to retain one or more older paging
systems, a similar form of zone paging may be achieved by using an Auxiliary Trunk CP and up to
three single zone paging systems. The Auxiliary Trunk CP provides three ports which may be used
to interface paging systems. Each of these ports is identified by a unique access code. A fourth code
is used to access all three paging systems (zones) simultaneously.
A paging system that is interfaced to System 25 via a ground start trunk port, a loop start trunk port,
or an auxiliary trunk port can be administered to be dial restricted. This restricts users from
accessing the equipment unless they are assigned DSS buttons with paging access codes. A paging
system that is interfaced to System 25 via an industry-standard tip/ring station line port cannot be
administered to be dial restricted.
Considerations
System 25 can support virtually any new or in-place third-party paging system. Most modern paging
systems interface through a ground start trunk port, a loop start trunk port, or an industry-standard
tip/ring station line port. System 25 can also support paging systems that require a generic interface
with contact closure by using a paging system adapter, or by using an Auxiliary Trunk CP with its
supporting hardware. Selection of a particular port as an interface for a paging system will be
governed by the requirements of the specific paging system involved.
2-244November 1995 
						

							Paging System Access
System 25 supports all AT&T PagePac* voice paging systems. The following are the most
common interface arrangements for System 25 and AT&T voice paging systems.
PagePac 20 (with ZoneMate): This paging system interfaces with either a ground start or
loop start trunk port.No additional equipment is required. Zone paging is provided by the
ZoneMate.
PagePac 20 (without ZoneMate): The PagePac 20 PowerMate may be used alone as a single
zone paging amplifier.If the PowerMate is used without a ZoneMate, each PowerMate
requires either a port on an Auxiliary Trunk CP (with an Auxiliary Trunk Interface and a
Paging/Dial Dictation Interface), or a port on a Loop, Ground, or T/R/analog CP, and a
Paging System Adapter.Zone paging is provided by the Auxiliary Trunk CP, if used. Each
of the three auxiliary ports available for paging system access may connect to a paging
system, providing up to three paging zones.
PagePac VS: PagePac VS may be interfaced with System 25 by means of a loop start trunk
port or a tip/ring station line port.PagePac VS provides a built-in interface card which
cannot be removed or changed. No other interface options are supported for PagePac VS.
PagePac Voice Paging Systems: The larger, complete paging systems in our product line are
collectively known as PagePac Voice Paging Systems.They are currently available in sizes
ranging from 50 Watts to 200 Watts and, when ordered as complete systems, are shipped
with a Type C Applique. This Type C Applique may be optioned during installation to
interface with a ground start trunk port, loop start trunk port, or a tip/ring station line port.
PagePac Voice Paging Amplicenter: The Amplicenter is the amplifier component of the
complete PagePac Voice Paging System.If the Amplicenter is used alone as a single zone
paging amplifier it requires either a port on an Auxiliary Trunk CP (with an Auxiliary Trunk
Interface and a Paging/Dial Dictation Interface) or a Paging System Adapter. Zone paging is
provided by the Auxiliary Trunk CP, if used with multiple Amplicenter. Each of the three
ports available for paging system access may connect to a paging system, providing up to
three paging zones.
Paging is particularly useful when used in conjunction with the Park feature. When a user is
away from his or her location and receives a call, the call can be answered and parked by
another user. The called party can then be paged and told what extension number to call to
retrieve the parked call. The called party can then retrieve the call from any voice terminal.
Interactions
The following features interact with Paging System Access.
Direct Inward Dialing (DID): A DID call may access a paging code. This allows an outside
user to dial in and utilize the Paging System.Dial restricting the paging code will block this
interaction.
* 
Trademark of Harris Corporation Dracon Division
2-245 
						

							FEATURES AND SERVICES
Tie Trunks: Incoming Tie Trunk calls can access paging ports connected to Auxiliary Trunk
circuit packs.If administered as a Tandem Trunk, an incoming Tie Trunk can also access
other types of paging ports.
Administration Requirements
Ground Start or Loop Start Trunk Port:
l Requires a port on a ZTN76 Ground Start Trunk CP or ZTN77 Loop Start Trunk CP
for each interface required.If the paging equipment requires a contact closure
(equivalent to a push-to-talk switch) a paging system adapter must be installed
between the port and the paging system.
l Assign as Paging Port. (Action = 16; 1 = Yes or 0 = No). Default = No.
l Assign Trunk Access Code.
l Dial restrict zone (yes or no).
l Assign other appropriate CO trunk parameters.
Auxiliary Trunk Port:
l
l
l
lA port on a TN763 Auxiliary Trunk CP, an Auxiliary Trunk Interface and a Paging/Dial
Dictation Interface are required for each interface.
Assign Paging access code for each paging system (maximum = 3) to be provided.
Dial restrict each paging system (yes or no)
Assign an “All Zones” access code.
Multiline Voice Terminal Port:
l Assign DSS button with paging zone access code as required.
Hardware Requirements
Requires a paging system that is compatible with telephone systems. Each paging system
requires at least one suitable System 25 port.Selection of the type of System 25 port (loop
start, ground start, Auxiliary trunk or tip/ring station line port) is dependent on the paging
system or its adapter.If a choice is available, the recommended method of interfacing is via
CO trunk ports (either loop or ground start).
Some customer-provided equipment, typically older systems, may require contact closure to
control the paging equipment.In this case either a paging adapter or a port on a TN763
Auxiliary Trunk CP must be used.If an Auxiliary Trunk CP is used to support multiple paging
systems (up to three) each paging system constitutes a single zone and an additional dial
code may be administered to access all zones simultaneously.
2-246 
						

							Paging System Access
Detailed connection information is provided in Figures 2-36 and 2-37.
Descriptions of the SIP (Station Interconnect Panel), TAE (Trunk Access Equipment), and
associated cables and adapters are provided under the heading “Connectivity” in Section 4
of this manual.
PART OF TAE700A NETWORKSYSTEM 25INTERFACE BLOCKW1
CABINET(110- OR 66-TYPE
CONNECTING BLOCK)
ZTN76B
W1C5† PAGINGORB1>ZTN77SYSTEM
LEGEND:
ZTN76 - CO GROUND START TRUNK CP
ZTN77 - CO LOOP START TRUNK CP
B - 3 TO 1 SPLITTER CABLE-CONNECTORIZED (OR6016) - PEC 2720-06X
B1- TYPICAL-103A CONNECTING BLOCK*C5 - MODULAR CORD (D4BU-87)W1 -4-PAIR INSIDE WIRING CABLE*
* FURNISHED BY INSTALLER
† PAGING SYSTEM -PAGE PAC 20 E/W ZONE MATE 9 - PROVIDES 9
PAGING ZONES, PLUS ALL-ZONE PAGING
Figure 2-36.
Paging Equipment Connections Using CO Trunk Ports (FCC Registered)
2-247 
						

							FEATURES AND SERVICES
SYSTEM 25
CABINETPART OF 25-PAIR CABLE
PART OF
66-BLOCK
PAGING ORAW1278AW1C5TN763DICTATIONADAPTERB1SYSTEM
C6
D-181321
LEGEND:
TN763 -A -
B1 -
C5 -
C6 -
P1 -
W1 -
ZENER KIT
C6
48V DC
P1
AUXILIARY TRUNK CP
SINGLE-ENDED 25-PAIR CONNECTOR CABLE (A25D) (NOTE 1)
TYPICAL -103A CONNECTING BLOCK*MODULAR CORD (D4BU-87)*
SINGLE-ENDED MODULAR CORD (DYB4) (NOTE 2)
KS-22911, L1, POWER SUPPLY, 48 VOLT DC (NOTE 2)
4-PAIR INSIDE WIRING CABLE*
NOTES :1. APPARATUS CODE D-181523 (PEC 62511) INCLUDES
66E3-25 BLOCK CONNECTOR AND CABLE 825A 15/DE.
2. APPARATUS CODE D-181524 (PEC 62512) INCLUDES C6, P1, 278A
ADAPTER AND ZENER KIT.
* FURNISHED BY INSTALLER
Figure 2-37.Paging Equipment Connection to TN763 CP Using 278A Adapter
2-248