ATT System 25 Reference Manual

							HARDWARE DESCRIPTION
Figure 4-21. 12-Button
MET Set (7203M)
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							HARDWARE DESCRIPTION
ATL Cordless Telephone (5-Button) (PEC 3168MLC)
The ATL Cordless Telephone (Figure 4-22) consists of a handset plus a base. The telephone
with the handset placed in the cradle measures 5 inches wide, 2 1/2 inches high, and 8 1/4
inches deep, and weighs about 2 pounds and 9 ounces. The antenna on the base extends
about 2 feet. The base has the option to accept a 7-inch flexible antenna or a 9-inch rigid
antenna.The base can be desk or wall mounted and requires access to standard
commercial power. The handset comes equipped with the following:
l Touch Dial Pad (not DTMF)
l 5 Line Appearance buttons and I-Use and Status LEDS
l Fixed Feature Buttons (* = with status LED)
Transfer
Hold
Channel Selection
Line status*
Handset On/Off*
l Message Waiting LED
l Low Battery LED and tone
l Number card
l Carrying adapter case
l Out-of-range of base tone
l Beep on handset button presses
l Antenna
l Battery.
The base comes equipped with the following:
l Channel display
l Telephone status LEDS
l Telephone mode switch
l Message waiting LED
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							HARDWARE DESCRIPTION
l Tone ringer and volume control
l Security controls, antenna, handset battery charger.
Adjuncts: None
LINEAPPEARANCE
WITH I-USE
AND STATUS
LEDs
TOUCHDIALPAD
HANDSET
TELEPHONEMODE
SWITCH
VOLUMECONTROL
BASE
MESSAGE
WAITING
LED
Figure 4-22.ATL Cordless Telephone
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							HARDWARE DESCRIPTION
Multiline Voice Terminal Connection Information
Detailed connection information is provided under the “Connectivity” heading later in this
Section. Maximum cabling distances from the system cabinets to multiline voice terminals is
provided in Section 5,“Technical Specifications.”
Multiline Voice Terminal Feature Operations
Refer to Multiline Terminal User Guide (555-530-703) for information about feature operation.
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							HARDWARE DESCRIPTION
Voice Terminal Adjuncts
The following adjuncts and associated power supplies are supported on corded multiline sets
only:
l MET Headset Adapter (for 10-Button MET sets); refer to “Headset Adapter Adjunct”
in Section 2.
l 500A/502B Headset Adapter (for 12-Button MET sets and MERLIN System voice
terminals): refer to“Headset Adapter Adjunct” in section 2. The 502B must be used
if Hands-Free Answer on Intercom (HFAI) operation on the headset is desired (for
example, typical Call Management System application).
l 4A Speakerphone System (for 2500SM single-line sets and 10-Button MET sets);
refer to “Speakerphone Adjunct” in Section 2.
l S101A/S102A Speakerphone (for 12-Button MET sets and MERLIN System voice
terminals, respectively); refer to “Speakerphone Adjunct” in Section 2.
l KS 23566,L1 Ke (Ground Start Button)
A KS 23566,L1 Ground Start Button is required for each Power Failure Transfer
(PFT) station that is connected to a ground start trunk during power failures.
l Acoustic Coupler
An Acoustic Coupler (349A Adapter) can be used with the 7300H series voice
terminals and MET sets.The coupler provides acoustic coupling between the
handset and acoustic modems.
l Answering/Announcement Machine
A suitable answering/announcement machine can be used as an adjunct to single-
line voice terminals. Note that when such a machine is bridged on to a ZTN78 Tip
Ring Line CP port, the combined adjunct/terminal REN must not exceed 1.15 A/B.
l Z3A Message Waiting Indicator (MD)
The Z3A Message Waiting Indicator provides a message waiting light at 2500 Series
single-line voice terminals that do not have a built-in lamp. Existing sets with this
adjunct can be reused.
Voice Terminal Adjunct Connection Information
Detailed adjunct connection information is provided in Section 2 with the detailed feature
descriptions of the headset adapter and speakerphone adjuncts.
Descriptions of the Station Interconnect Panel (SIP), Trunk Access Equipment (TAE), and
associated cables and adapters,as shown on the figures, are provided under the
“Connectivity” heading later in this Section.
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							HARDWARE DESCRIPTION
Voice Terminal Adjunct Power Supplies
Table 4-F provides a summary of the supplemental power supplies and their applications.
Table 4-F.Supplemental Voice Terminal Power Supplies
POWER SUPPLYOUTPUT
2012D Transformer18 V ac
KS-22911, L1 Power-48 V dc
Supply
85B1 Power Unit18 V ac
FOR USE WITH
ADUs (except Z3A5).
MET sets that require local power
500A Headset Adapter.
S101A Speakerphone.
Selector Console.
Z3A5 ADU.
7300 H-Series sets that require local
power.
502B Headset Adapter (see note).
S102A Speakerphone (see note).
4A Speakerphone System
Note:This power supply is required whenever an adjunct (Headset Adapter or
Speakerphone) is connected to a 22- or 34-button voice terminal.
Attendant Consoles
System 25 can have one of the following attendant console configurations:
l One or two Direct Trunk Attendant Consoles (DTACs)—34-Button Voice Terminals
(PEC 3162-417, 3162-BIS, or 3167-34B) administered for attendant service. Either or
both positions can have a Direct Extension Selector Console associated with it.
l One or two Switched Loop Attendant Consoles (SLACs)—34-Button BIS/Display
Voice Terminals (PEC 3162-DIS or 3167-DSB) administered for attendant service.
Either or both positions can have a Direct Extension Selector Console associated
with it.
Complete information on the Attendant Console features can be found in Section 2.
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							HARDWARE DESCRIPTION
Asynchronous Data Units (ADUs)
Asynchronous Data Units and Multiple Asynchronous Data Units (MADUs) provide an
interface between ports on the TN726 Data Line CP and RS-232 Data Terminal Equipment
(DTE) or Data Communications Equipment (DCE). The DTE is equipment that provides a
data source, termination, or both—a host computer, printer, or a data terminal are examples
of DTE. The DCE is equipment that provides the functions required to establish, maintain,
and terminate data communications—modems are the most common DCE.
The Z3A series of ADUs (Figure 4-23 and 4-37) are DCE that allow a direct connection
between DTE and port circuits on the Data Line CP (TN726). To connect an ADU to DCE, a
cross-over cable (“null modem”) is required (PEC 2724-30C).
The modular jack labeled “Wall” connects the ADU to the building wiring with a standard 4-
pair modular cord. The 400B2 Adapter can be used to provide supplemental ac power for
the ADU and is bridged at the wall jack if required (Z3A1, 2, and 4 units only).
The modular jack labeled “Telephone” allows a voice terminal to be attached to the ADU.
Separate wire pairs from the telephone to the system cabinets are provided in a single 4-pair
cable run back to the SIP. The pairs separate at the SIP for connection to voice and data
ports.
The Z3A series of ADUs measure about 4.5 inches in length, 2 inches wide, and 1 inch high.
The ADUs available are shown in Table 4-G.
The Z3A ADUs should be installed only on “inside” facilities; they are not designed to be
used with CO cables or with exposed outside wiring (such as aerial cables).
The Z3A series of ADUs offer the following features:
l Provide an interface to the digital switch from RS-232 devices.
l Increases the distance RS-232 signals can travel over standard twisted-pair wiring.
Refer to Section 5, “Technical Specification” for distance limitations.
l Data and control signals can be transmitted 2,000 feet in asynchronous full-duplex
mode at speeds up to 19,200 bps. The transmission speed automatically matches
that of the attached RS-232 device.
l The dc isolation via opto-couplers ensures high noise immunity, resulting in very low
error rates.
l A variety of Z3As with different connectors allows easy connection to RS-232
terminals, printers, and host computers (see Table 4-G).
l Most Z3As can be powered from the RS-232 interface. The ADU requires 7 volts on
pin 20 (DTR) to operate properly. If the RS-232 equipment cannot meet this
requirement, a low-voltage power transformer and adapter(s) must be connected.
Z3A5 ADUs always require supplemental power.
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							HARDWARE DESCRIPTION
lAn analog single-line voice terminal (2500 or 7100 series) or a 7300H series multiline
voice terminal (Z3A5 ADU required) can be connected to the ADU, allowing the voice
terminal and DTE to share a common wall jack and 4-pair cable run back to the SIP.
Note:Neither off-premises nor out-of-building service can be provided with ADUs.
For additional information on ADUs, see Z3A Asynchronous Data Unit User Manual (555-401-
701).
ADU Connection Information
Detailed connection information is provided under the “Connectivity” heading later in this
Section.
RS-232C
CONNECTOR
INTERFACE
OPTIONAL
ORIGINATE/DISCONNECTSWITCH
Figure 4-23.Asynchronous Data Unit (ADU)
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							HARDWARE DESCRIPTION
Table 4-G.Asynchronous Data Units
UNITPEC
FEATURE
Z3A12169-001
3-foot plug-ended EIA connector and mod jack
for single-line set.
Z3A22169-002
EIA plug and mod jack for single-line set.
Z3A42169-004
3-foot receptacle-ended EIA cord and mod
jack for single-line set.
Z3A5
625063-foot plug-ended EIA connector and mod jack
for hybrid set. (PEC includes KS-22911 L1
power supply and D8W-87 cord.)
MADU
2169-005
Self-powered. Used for host or protocol
converter connections where voice terminals
are not required.No sets can be connected
directly to the MADU.
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							HARDWARE DESCRIPTION
Peripheral Equipment
Peripheral Equipment includes the following devices that connect to the call processing
portion of the CPU/MEM (ZTN130) CP:
l System Administration Terminal (SAT); refer to “System Administration” in Section 2.
l Digital Tape Unit (DTU); refer to “Digital Tape Unit” in Section 2.
l Station Message Detail Recording (SMDR) printer or Call Accounting System (CAS);
refer to “Station Message Detail Recording” or “Call Accounting System” in Section
2.
Auxiliary Equipment
Auxiliary equipment supports System 25 features and services. The following equipment is
supported:
l Dictation Equipment; refer to “Dictation System Access” in Section 2.
l External Alerting Equipment; refer to “External Alerts” in Section 2.
l Music Source (Music-On-Hold); refer to “Music-On-Hold” in Section 2.
l Paging Equipment; refer to“Paging System Access” in Section 2.
l Recorded Delay Announcement Equipment; refer to “Direct Group Calling Delay
Announcement” and “Night Service Delay Announcements” in Section 2.
l Optional Power Equipment.
Note 1:Auxiliary equipment connected to the ZTN78 Tip Ring Line CP must meet
the following requirements:
— AC impedance: 600 ohms
— DC current less than 30 ma at 24 V dc
— Ringer Equivalent Number (REN) less than 1.15
— Distance must not exceed 2000 feet
Note 2:Off-premises auxiliary equipment must be connected to the TN742 Analog
Line CP. If the auxiliary equipment requires a contact closure, the TN763
Auxiliary Trunk CP must be used (on-premises service only).
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