3060/V24
102001UA
2-6
I
NSTALLATION
A
ND
O
PERATIONS
M
ANUAL
S
ETUP
& I
NSTALLATION
P
ATTON
E
LECTRONICS
C
O
.
RX Clock Source Selection (SW24-1,2,3)
RX Clock Source is selected by SW24-1, 2 and 3. The following table indicates the source
options provided by the 3060/V24 (CTS MD-V.24/TCB). If the TXC source is pin 24, both
RXC and TXC will be sourced from pin 24. When the unit is used in an Async network select
INTERNAL as the source of the RX Clock.
SW24-1 SW24-2 SW24-3
Source
ON
ON
ON
Master
OFF
ON
ON
Port 1
ON
OFF
ON
Port 2
OFF
OFF
ON
Port 3
ON
ON
OFF
Port 4
OFF
ON
OFF
Port 5
ON
OFF
OFF
Port 6
OFF
OFF
OFF
Internal
Tail Circuit Buffers (SW22-8)
The 3060/V24 (CTS MD-V.24/TCB) has a Tail Circuit Buffer that is automatically selected
when a Sub-Channel is set as a DTE. The buffer will provide clock synchronization of the data
from the Sub-Channel to the Master Port for Tail Circuit operations. The buffer is de-activated
when the Sub-Channel is configured as a DCE. When operating in an asynchronous
environment the Buffer must be bypassed. To bypass the buffer in a synchronous or
asynchronous application, set switch SW22-8 to
OFF
OFF
OFF
OFF
OFF
(ASYNC). For normal operation in a
synchronous environment set SW22-8 to
ON
ON
ON
ON
ON
(SYNC). When using a tail circuit modem with
the 3060/V24 (CTS MD-V.24/TCB), the modem connected to the Sub-Channel, should be set
to External Transmit Clocking. The modem at the remote end of the connection should be set
to RX-TX Clocking or Slaved TX Clock. This will insure the same clock is present throughout
the network and clock slippage will not occur.
Port DCE/DTE Selection (SW7 thru SW20)
Slide switches SW7 through SW20 are used to configure DTE/DCE for each port. Slide Both
switches associated with a port to the same position.
Example: If connecting a modem (DCE
Device) to the PORT, then the port should be configured as a DTE interface. Slide both
switches to the DTE position toward the interface connector. If connecting a terminal (DTE) to
the Sub-Channel, the port should be configured as a DCE. Slide both switched to the DCE
position away from the interface connector.
The port is always configured opposite to the
interface that is to be connected to it. When a port is selected as a DCE, pin 9 and 10 test
voltages are provided to the interface connector if JP4 and JP5 are installed. If the port is
