Data Port Parameter; G.703 Port - ABB ETL600 Instruction Manual

ETL600
5.3.5.3.

Data Port Parameter

5.3.5.3.1.

G.703 port

Not supported with ETL600 Release 1.
5.3.5.3.2. V.11 ports
When a DPLC channel has been configured, each available V.11 port
can be assigned to a MOD600 channel, if the DPLC channel
multiplexer is enabled. If the multiplexer is disabled, only V.11 port 1
can be used.
To assign a V.11 port to the modem, select MOD600 modem from the
drop down list. To disable the port, select Off .
The following parameter can be configured for each enabled V.11 port:
Clock/data phasing (edge) :
For synchronous data transmission, the instant of reading and writing
data in relation to the clock signal can be selected from a drop-down
list. The following four possibilities are available:
- DCE: D-out valid on pos edge / D-in valid on pos edge ;
- DCE: D-out valid on pos edge / D-in valid on neg edge ;
- DCE: D-out valid on neg edge / D-in valid on pos edge ;
- DCE: D-out valid on neg edge / D-in valid on neg edge .
Fig. 5-2 shows the resulting waveforms for clock and data. The writing
of data (receive data) coincides with either the positive or negative-
going edge of the clock signal. The same applies to reading data
(transmit data).
Fig. 5-2
the edge setting has to be adjusted to suit the data terminal, if there
are too many bit errors or any slipping occurs.
The system might operate correctly for a while even though the clock
edge is not set correctly.
Note:
Configuration and Set-up
1KHW001489-EN
Data in relation to clock signal
The system might operate correctly for a while even
though the clock edge is not set correctly.
ABB Switzerland Ltd
Clock
Data valid on neg. edge
Data valid on pos. edge
November 2005 5-25