Verilink QUAD DATA (880-503319-001) Product Manual Manual de usuario descargar pdf (Pagina 32)

Configuration

3-8 Verilink QUAD DATA User Manual

Figure 3-5 Crossover Cable

If the network design requires the QUAD DATA port to be part of a

tail circuit, accepting timing from a DCE device—there are two

methods available:

•

Use a straight through cable to connect the DCE to the QUAD

DATA port, put the port in DTE mode, and set the port to be

the shelf timing source (see the section “Timing Menu”).

•

Use a crossover cable to connect the DCE to the QUAD DATA

port, put the port in DCE mode, set the clock selection to TT,

and set the port to be the shelf timing source (see the section

“Timing Menu”).

Timing Menu

The SCM maintains a timing table for all of the modules in each

shelf of a node. This table determines the transmit clock source for

each QUAD DATA module in the shelf, as well as all T1 network

modules.

NOTE:

Any QUAD DATA port configured for DTE mode must provide

clock for the shelf. Each shelf may have only one active clock

source. Therefore all QUAD DATA ports set for DTE mode in

any shelf must be connected to the same clock source.

The

Timing Menu

is accessed by using the

command on the

QUAD DATA Configuration Menu

. See Figure 3-6.

Quad

Data

Module

DCE

Mode

Receive Data

Transmit Data

Receive Clock

Transmit Clock

Crossover Cable

DCE

Transmit Data

Terminal Timing

No Connection

Terminal Timing

Transmit Clock

Receive Data

Device

Receive Clock

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 46 47

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Verilink QUAD DATA (880-503319-001) Product Manual Manual de usuario Pagina 32

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