Verilink PRISM 3030 (34-00208.L) Product Manual Manual de usuario descargar pdf (Pagina 77)

Configuration Screens 67

Start Channel #

The starting channel in the 24-channel DS1 bit stream must be selected in this

field. The unit then assigns the following channels automatically according to the

bit rate and the mode selected in DS0 Channel Assignment. The choices are 1

through 24.

Port Rate

Selects the required port bit rate in increments of 56 or 64 kbps, depending on the

Rate Multiplier setting. The N multiplier ranges in value from 0 to 24.

# of Channels

Displays the number of channels to be passed through to the T1 DTE. This

number is determined by the selection in Port Rate.

Transmit Clock

Used to select the clock that the unit uses to sample the data transmitted from the

DTE. When set to INTERNAL, the data is sampled directly with the transmit data

clock also supplied to the DTE as Transmit Clock. The EXTERNAL option uses

the external clock supplied by the DTE. The OVERSAMPLED option is used to

operate the port as a low-speed asynchronous port. In this mode, the port rate

should be set to at least four times the asynchronous data rate (depending on the

degree of allowable distortion for the particular DTE equipment used).

V.54 Loop

Selecting Enable

allows the unit to respond to in-band V.54 loop commands. If

Disable is selected, the unit ignores these commands.

Invert Data

In the invert mode (YES), transmit and receive data are inverted at the port

interface. This function can be used to guarantee ones density when the data is

composed of SDLC type protocols. The choices are YES and NO.

CTS/DSR/DCD Control

Setting any of these three fields to FORCE TRUE

or FORCE FALSE allows the

forcing of the port control lead output state. INTERNAL allows for normal

operation as shown in Figure 3-12 on page 30.

Alarm on DTR Loss

Selecting Enable allows the unit to go into alarm on loss of DTR. The default

setting is Disable.

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Verilink PRISM 3030 (34-00208.L) Product Manual Manual de usuario Pagina 77