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)...

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...

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...

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....

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...

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...

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...

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...

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...

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...