ATT System 25 Reference Manual

ENVIRONMENTAL REQUIREMENTS
The base should be located at least; three feet away from any metal object (such as metal
window frames), six feet away from any computing equipment, and six feet (20 feet for
minimum interference) away from electromagnetic sources.Avoid using the handset in areas
with metal objects in the line of sight between the handset and the base.
If RFI is experienced while using the set, moving the base to a different location can
significantly increase the range. Moving the base to a...

ENVIRONMENTAL REQUIREMENTS
AC Power Requirements
Each System 25 cabinet requires 500 Watts at 115V ac (maximum).
The System 25 power service must be a dedicated branch circuit with no other equipment
served (see Figure 6-3). The customer should provide a load center of appropriate current
rating (ITE EQ4 typical) equipped with 120V ac, 15 ampere (AMP), single pole magnetic
circuit breaker(s) (ITE QP1-BO15 typical).Each breaker is to protect 2 associated wall
mounted 115 V ac, 15 AMP, receptacles (HUBBELL...

ENVIRONMENTAL REQUIREMENTS
Figure 6-3.AC Power Distribution - Multiple Cabinet System
6-9 

ENVIRONMENTAL REQUIREMENTS
Grounding
Connection of an approved ground to the system cabinets is essential. An approved ground
may consist of any of the following:
l Grounded Building Steel—The metal frame of the building.
l Water Pipe—A continuous metal water pipe, not less than 1/2 inch diameter, that is
connected to an underground metal water pipe that is in direct contact with earth for
10 feet or more.
l Concrete-Encased Ground—An electrode encased by at least 2 inches of concrete
and located within...

ENVIRONMENTAL REQUIREMENTS
l Surge protection on the AC power to System 25 and associated equipment (SAT,
SMDR, DTU, etc.) provided by the TII 428 Unit.
The protection outlined above is adequate for more than 99 percent of all lightning strikes.
For the few remaining cases, external secondary protection, located at the trunk access area
of the cross-connect field, can be employed.Several commercially available units can be
used. If 66-type block terminations are used, a very convenient device is the...

PARTS INFORMATION
Parts Listed by PEC                                7-1
Parts Listed by COMMODE                               7-9
-i- 

PARTS INFORMATION
PARTS INFORMATION
This section contains information that may assist you in cross-referencing Apparatus Codes
Component Codes (COMCODEs) and Price Element Codes (PECs). The first table is grouped by
descriptive PEC. The second table is arranged by COMCODE.
Parts Listed by PEC
PECDESCRIPTIONAPPARATUS CODE
COMCODE
6250-031System 25 Control Unit (R3V2)includes105243810
CarrierJ58901A2 L-13 (e/w)
Consists of:
Power SupplyWP90510 L2 (MD)
403954761
WP90510 L3406846733
Fans (2)WP90677...

PARTS INFORMATION
PECDESCRIPTIONAPPARATUS CODE
COMCODE
62507Digital Tape UnitTS-555A
404079436
62508System Administration Terminal    TI-703
404079428
(SAT)
62509
Direct Extension Selector23A1-003 e/W103969424
Console
Consists of:
Mod CordD6AP-87102937620
Mod Cord (14 ft)D8W-87103786802
Power SupplyKS-22911 L1403242639
Adapter400B103848859
62510
MERLIN® 9 Sys. Voice Terminal      D181522 includes105105514
(VT) local power
Consists of:
AdapterZ400F
103942857
Mod CordD6AP-87
102937620
Power SupplyKS-22911...

PARTS INFORMATION
PECDESCRIPTIONAPPARATUS CODE
COMCODE
62514Emergency Transfer Unit10B ETU103984118
Consists of:
Cables (2) (15 ft DE)B25A
100017334
Mod Cord (7 ft)
D8W-87103786786
62515
Peripheral Interface for On-D-181558
Premises Direct or Switched
Connection
Consists of:
Adapter248B
102802113
Adapter355AF105012645
Adapter400B2104152558
Mod CordD6AP-87102937620
ADU Crossover CordD8AM-87104154430
Mod cords (2) (7 ft)D8W-87103786786
EIA Crossover CordM7U-87104246616
ADU
Z3A4103964185...

PARTS INFORMATION
PECDESCRIPTIONAPPARATUS CODE
COMCODE
62527NR3V3 Upgrade (R3V1/V2 to R3V3)
Consists of:
CPU/MEM CPZTN142
107057754
--Service Circuit CPZTN131105275671
63111
Analog Line CPTN742
103556957
63112
MET Line CPTN735103556882
63113
Hybrid Line CPTN762B103976171
63115
CO Trunk CPTN747B105167266
63116
DID Trunk CPTN753
103557062
63118
Aux Trunk CPTN763D10605616
63119
Pooled Modem CPTN758103557112
63123
Tone Detector CPTN748D
106502552
63130
Data Line CPTN726103556791
63136Analog Line...