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Peripheral Equipment
Peripheral Equipment is equipment that connects to the Call Processor (ZTN82 or ZTN128)
CP, including:
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System Administration Terminal (SAT); refer to “System Administration” in section
2.
Digital Tape Unit (DTU); refer to “Digital Tape Unit” in Section 2.
Station Message Detail Recording (SMDR) printer or Call Accounting System (CAS);
refer to “Station Message Detail Recording” in Section 2.
Auxiliary Equipment
Auxiliary equipment supports System 25 features and services. The following equipment is
supported:
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Dictation Equipment; refer to “Dictation System Access” in Section 2.
External Alerting Equipment; refer to “External Alerts” in Section 2.
Music Source (Music-On-Hold); refer to “Music-On-Hold” in Section 2.
Paging Equipment; refer to “Paging System Access” in Section 2.
Recorded Delay Announcement Equipment; refer to “Direct Group Calling Delay
Announcement” and “Night Service-Delay Announcements” in Section 2.
Optional Power Equipment.
Notes:
1. Auxiliary equipment connected to the Ztn78 Tip Ring Line CP must meet the
following requirements:
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AC impedance: 600 ohms
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DC current less than 30 ma at 24V dc
– Ringer Equivalent Number (REN) less than 1.20
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Distance must not exceed 2000 feet
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).
Optional Power Equipment
In addition to the power supplies already mentioned, the following equipment can be used
with System 25.
Uninterruptible Power Supply
The AT&T lKVA Uninterruptible Power Supply (UPS) Model 010U111 PEC 2403-004 is
recommended. At maximum load the UPS will bridge a 5 minute power outage. The UPS
must be connected to the common System 25 power outlet. One UPS will support a two
cabinet system.
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