4RF Aprisa XE User Manual page 133

3. The CTS Source defines the mode in which the CTS signal responds to the remote DTE. Three options
are available:
CTS Source
Remote RTS
Local RTS
On Permanent
Note that the CTS behaviour is not impacted by the operation of the card loopbacks.
4. The Sample Data On defines the received clock edge on which the received data is clocked into the
port. Two options are available:
Sample Data On
Falling Clock Edge
Rising Clock Edge
5. 'Loopback' loops back the port data to the customer (default is no loopback).
6. Click Apply to apply changes or Reset to restore the previous configuration.
Over Sampling Mode
In over sampling mode, 64 kbit/s of radio capacity is allocated to the circuit and the incoming interface
data is sampled at a fixed 64 kHz. This timeslot can be cross connected to an E1 or T1. This over sampling
mode can be operated up to 19.2 kbit/s.
There will be some unavoidable distortion in mark space ratios (jitter) of the transported V.24 circuit. This
effect will become progressively more significant as the baud rate of the V.24 circuit increases or the
number of data conversions increases.
In over sampling mode, the DTE clock input is not used and there is no DCE output clock available.
1. Select Link or Local or Remote > Interface > Interface Summary, then select the QV24S interface and
click Configure Interface.
Function
The local CTS follows the remote RTS signal.
In the case of radio link failure (when cross connected over
the link) the signal goes to OFF.
The local CTS signal follows the local RTS.
The status of the link does not impact on the CTS signal.
The local CTS is in a permanent ON (+ve) state.
This does not go to OFF if the link fails.
Function
The falling edge of the XTXC is used to clock data into the
port.
The rising edge of the XTXC is used to clock data into the
port.
Aprisa XE User Manual
Configuring the Traffic Interfaces | 131