Verilink 1558A (34-00228) Product Manual Instrukcja Użytkownika Pobierz pdf (Strona 4)

General 1-11558A APS

General

1.0 Introduction

The TxPORT 1558A APS (Automatic Protection Switch)

unit provides automatic T1 service restoration from a

degraded or failed T1 facility to a standby T1 facility. See

the ‘Operation’ chapter for a typical APS application.

Switching from the failed line (Path A or Path B) to the

standby (Path A or Path B) is based upon user definable

switching alarm thresholds (errored seconds, consecutively

severely errored seconds, loss of signal, loss of frame). The

1558A APS is fully compatible with all industry standard

APS equipment that complies with PUB 54017, 1991.

1.1 Design Highlights

The APS unit is designed so that it can be configured to sup-

port a wide variety of user applications. The key features

and functions are:

• Mission-Critical Automatic Protection Switching from a

Fail or Impaired T1 Facility to a Standby T1 Facility

• D4 or ESF Framing,

• AMI or B8ZS Line Coding

• Integral ESF CSUs (TR 54016 compliant)

• 24 Hour Performance History

• Revertive and Non-revertive Operation

• User-Definable Alarm Switching Thresholds

• Proactive Call-on-Alarm Reporting (requires manager)

• Desk Top or Rack Mount

• Redundant Power Configurations (AC or DC)

• Bantam Test Access Jacks

• Complies with AT&T 54017 Automatic Protection

Switching, 1991

• FCC, DOC, UL, and CSA Compliant

1.2 Specifications

T1 Network Interface

Line Rate: 1.544 Mbps

Framing: ESF

Line Code: AMI or B8ZS

DS1 Interface: +1 to -27 dB ALBO, 100 Ω (± 5%)

Connector: RJ48 jack

Overvoltage Primary and Secondary lightning

Protection: fusing for line cross

ESF Mode: Pass/Block Facility Data Link

to/from Network

CPE (Equipment Interface)

Line Rate: 1.544 Mbps

Framing: D4 or ESF

Line Code: AMI or B8ZS

DSX Interface: DSX -1 to -6 dB (ALBO), RJ48

jack, 100 Ω (± 5%), 0 to 655 ft.

Connector: RJ48 jack

SUPV PWR

STATUS

ABYPASS LOCKED B

ALM LOS LP

SELECT

AUTO

PATH

STATUS

PATH

RX BRDG

TX BRDG

RX BRDG

TX BRDG

DTE

LOS

RX BRDG

TX BRDG

TxPORT

1558A Automatic Protection Switch for customer premise

1558A

1 2 3 4 5 6 7 8 9 ... 38 39

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