Verilink PRISM 3030 (34-00208.L) Product Manual - Manual (Page 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.