Specifications

166119 8/31/2006

4.7.3.3 Channel Port Type [3]

This menu allows the selection of the type of port interface standard used at the selected

port. RS-232 is available on all ports, whereas EIA-530, X.21 and V.35 are available only on

the first port of each port card. It is not required that the port electrical type be the same for a

given channel on each end of the link, but it is not possible to apply async and synchronous

formatted data on opposite ends of the same channel.

Option [1] - RS-232, Async, 8-bit

Option [2] - RS-232, Async, 9-bit

Option [3] - RS-232, Async, 10-bit

Option [4] - RS-232, Async, 11-bit

Option [5] - RS-232 Synchronous

Option [6] - EIA-530 / X.21, Sync (Channels 1,5,9,13 only)

Option [7] - V.35 Synchronous (Channels 1,5,9,13 only)

4.7.3.4 Channel Port TxD Clock Signal [4]

This option permits the selection of the clock signal used to clock the TxD input to the

multiplexer. TxC is the default, however, if the DTE returns the TxC signal as TxCE, it may be

used as an alternative clock. This may be necessary on longer cables running at higher clock

rates, to maintain timing margins between TxD and it‟s clock signal.

Option [1] - TxC

Option [2] - TxCE

4.7.3.5 Channel Port RTS/CTS Delay [5]

Selection of this option determines the response of the channel port‟s CTS control signal.

CTS may be set steadily ON or OFF, or, may be set to follow the port‟s RTS signal input, with

or without a delay as specified in the options below.

Option [1] - No Delay

Option [2] - 3 mS Delay

Option [3] - 7 mS Delay

Option [4] - 13 mS Delay

Option [5] - 26 mS Delay

Option [6] - 53 mS Delay

Option [7] - CTS Off

Option [8] - CTS On

4.7.3.6 Channel Port DCD Source [6]

This option controls the behavior of the port‟s DCD control signal output.

Option [1] - Follows Composite Sync State

Selection of this option causes the DCD signal to follow the SYNC state of the composite to

which the channel is assigned. This is the default mode

Option [2] - Follows Far-end RTS

Selection of this option causes the port‟s DCD signal to follow the RTS control lead input on

the far-end multiplexer, providing the composite SYNC state is ON as in Option 1 above.

NOTE: When a composite port is put into a LOOP mode (transmit or receive), all DCD

signals of channels active on that port‟s link are disabled, regardless of which above mode is

chosen.