ADTRAN TSU LT User Manual download pdf (Page 36)

Chapter 5 Config Menu TSU LT 220V User Manual

Figure 5-2. Network Submenu

Clock Sources and Timing

The TSU LT 220V operates from various clock sources, permitting it to perform properly in many different

applications. Use the

CONFIG > NETWORK (NI) > 5)CLOCK SOURCE: menu to set the network interface

clocking options (network, DTE, or internal timing). See the descriptions for Network Timing on page 37,

DTE Timing on page 37, and Internal Timing on page 38.

Table 5-1. Network Interface Submenus

Submenu Description

FORMAT Sets the frame format for the NI.

Choices: D4, ESF, AUTO

a D4 is equivalent to Superframe Format (SF).

CODE Sets the line code for the NI.

Choices: AMI, B8ZS

YEL ALRM Enables and disables the transmitting of yellow alarms.

Choices: ENA (enable), DISA (disable)

XMIT ALRM Enables and disables the transmitting of performance report message (PRM) data on the

facility data link (FDL). The PRM data continues to be collected even if XMIT PRM is disabled

(possible only with ESF Format).

Choices: ENA (enable), DISA (disable)

CLOCK SOURCE

b For more information on clock sources and timing, see Clock Sources and Timing on page 36.

Selects the clock source for transmission toward the network from the NI.

Choices: NETWORK, DTE, INTERNAL

SET LBO Selects the line build-out (amount of attenuation, in dB) for the network interface.

Choices: 0, 7.5, 15, 22.5

The clocking option selected always designates the clock source for transmission.

Clocking necessary for receiving data is always recovered from incoming data.

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ADTRAN TSU LT User Manual Page 36