Zhone Technologies IMACS-200 manual Chapter SRU Ports, SRU port User Screens and Settings

SRU Ports Introduction

Chapter 8

SRU Ports

8.1Introduction

This chapter provides information regarding the configuration and troubleshooting for the Low Delay Subrate Data (LD-SRU) ports.

The SRU ports allow you to connect up to 5 RS-232, low-speed and medium-speed (300 kbps to 38.4 kbps) data terminals to the Integrated Access System. You can multiplex a number of those devices onto a single DS0 time slot of a WAN or OWAN port. Each port has delay that is a maximum 3ms +/- 10% end-to-end of rates 9.6 kbps or higher for sync, and maximum of 6ms +/-10% end-to-end of rates 9.6 kbps or higher for async.

Each LD-SRU port receives timing from either the external DTE or the Integrated Access System clock. If the DTE supplies the transmit timing, that clock signal must be synchronized to the Integrated Access System’s clock source.

Note: Some changes to SRU ports require that the ports be put in standby then the active modes for the changes to take effect.

8.2SRU port User Screens and Settings

You must configure the SRU port for operation before use. This is done from the SRU port Main Screen (Figure 8-1). To go to that screen, highlight the desired port on the System Main Screen and press <Enter>. The SRU port Main Screen has five columns of data for port configuration purposes. The port numbers on the screen correspond to the port faceplate jacks.

Sub Rate Data Ports 8-1