Specifications

Optimux-XLT1 Installation and Operation Manual Chapter 1 Introduction

Functional Description 1-5

Link Redundancy

An additional link interface can be ordered for backup. The two link interfaces are

both identical. The link interfaces are implemented by interchangeable link

modules plugged into two dedicated slots at the rear of the Optimux-XLT1 unit

designated LINK A (MAIN) and LINK B (BACKUP). Front panel LEDs provide AIS

and signal loss (SYNC LOSS) indications on the link.

When two link modules are installed, the redundancy mechanism of the

Optimux-XLT1 is used to:

• Automatically switch to the back-up link interface in case of signal or sync loss

on the main link. If the redundancy mode is set to AUTOMATIC, under signal

loss, the main link (equipment and/or line) resumes transmission after it has

recovered. Under sync loss, the backup link continues transmission until it

receives a sync loss/signal loss.

• Force transmission via the MAIN link using a software management tool for

maintenance purposes if the redundancy mode is OFF.

When the redundancy mode is MANUAL and the main link is disconnected or

fails, the backup link is forced into the active state. The main link will not resume

transmission as long as the redundancy mode is MANUAL.

Tributary Interface Characteristics

The modular design of the Optimux-XLT1 supports one fixed 10BaseT Ethernet

port and up to three additional plug-in channel modules. The additional channel

module types are specified in Table 1-2.

Table 1-2. Channel Module Options

Channel Module Port Type Bandwidth No. of

Ports

Port Connector

OP-XL-M/ETH 10BaseT Ethernet 6.639 MHz 1 RJ-45

OP-XL-M/FETH 10/100BaseT Fast Ethernet 6.639 MHz 1 RJ-45

OP-XL-M/2T1/BAL T1 Balanced (twisted pairs) 1.544 Mbps 2 RJ-45

OP-XL-M/4T1/BAL T1 Balanced (twisted pairs) 1.544 Mbps 4 RJ-45

OP-XL-M/4HS/1.5M/V35 V.35 1.544 Mbps 4 SCSI 26-pin

OP-XL-M/4HS/1.5M/RS530 RS-530 1.544 Mbps 4 SCSI 26-pin

OP-XL-M/4HS/1.5M/X21 X.21 1.544 Mbps 4 SCSI 26-pin

Order from: Cutter Networks

Ph:727-398-5252/Fax:727-397-9610