Zhone Technologies IMACS-200 manual Chapter Owan Port, Owan Port Description

Chapter 13

OWAN Port

13.1 Introduction

This chapter provides configuration, and troubleshooting information for the optional Optical WAN (OWAN) port. This port is labeled on the rear faceplate as OWAN1 and OWAN2. Connectors above each OWAN port LED indicator carry both the transmit and receive connections within each fiber. The OWAN port is a single transport facility that allows for a 1+1 protection, auto-switching when a loss of Signal (LOS) or transmitter fail event occurs.

Refer to the IMACS-200 Ordering Guide on page vi of the Product Description Chapter for information regarding units that contain the Optional OWAN interface.

13.2 OWAN Port

13.2.1 OWAN Port Description

The OWAN port provides two full duplex T1 or E1 compliant DS2 or E2 single-mode optical ports for optical serial N times 64 kbps interface capability. Only one of the ports can be active, with the other being a redundant link. Each optical port contains a transmit (Tx) and receive (Rx) in a single connector along with a status LED. The DS2 or E2 data is extracted from the encoded optical signal and demultiplexed into four standard DS1 or E1 signals. Optical connection between two IMACS-200 units is achieved using two bi-directional fibers, one active and one redundant.

The IMACS-200 OWAN circuit will terminate four DS1 or E1 signals, and multiplex them into a single DS2 or E2 formatted signal. The IMACS-200 supports various alarm detection events such as Optical LOS, DS2/E2 OOF, etc. The OWAN port is a 1310 nm single-mode fiber transmission path up to 20km using only one fiber for both directions. The second OWAN port is a redundant unit, auto-switching when the transmitter fails, or if a LOS event occurs. The IMACS-200 will report local as well as remote alarm indications.

The IMACS-200 employs a CMI (Coded Mark Inversion) encoder and decoder to provide the ability to extract a clock from the data stream and to decode and encode DS2 and E2 overhead information including T1 remote loopbacks (available in a future release) and protection switching data. Currently the IMACS-200 does not support the even bit.

OWAN Ports 13-1