Verilink 2000 (34-00182) Product Manual Manual de usuario descargar pdf (Pagina 17)

Unit Configuration

2-5

CSU Timing Source

In the normal mode of operation, CSUs clock out transmit data toward the network

using the timing derived by the data received from the DTE. Data transmitted

toward the DTE is clocked out using the timing derived by the data received from

the network.

For unique applications, the 2000 CSU allows timing to be derived from a single

source for data transmitted toward both the network and DTE. Positions S3-6,

S3-7, and S3-8 are used to set the CSU’s transmit timing source to one of the

values listed in Table 2-3.

For normal operation, S3-6, S3-7, and S3-8 should all be set to the Down position.

Configuration

Switch S4

Switch S4 (see Figure 2-3) is used to set the configuration parameters listed in the

following paragraphs. Detailed information on the connection and use of the

Supervisory and NMS ports is found in Network Management on page 2-11.

T1.403 Performance Reporting

The 2000 CSU conforms to ANSI standard T1.403. However, it allows turning the

performance report message (PRM) On or Off with Switch S4-1.

Down: PRM enabled Up

: PRM disabled

Audible Alarm

Position S4-2 enables the piezo buzzer, which indicates an alarm condition.

Down

: Disabled Up: Enabled

Table 2-3

Timing Source

S3-6 S3-7 S3-8 Timing Source

Dn Dn Dn Normal

Up Dn Dn Internal

Up Up Dn Network

Up Up Up DTE

Dn Up

7654321 8

T1.403 PRM

Audible Alarm

Boot Mode

SUPV Rate

NMS Rate

Figure 2-3

Switch S4

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 57 58

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Verilink 2000 (34-00182) Product Manual Manual de usuario Pagina 17