Westermo TDW-33 - Manual (Page 50)

6618-3202 50
Table 1 Dial and Transparent I/O connection types
Connected Data 1 prio Line
Type
No Empty No LL Illegal
No Empty Yes LL Illegal
No Number No LL Illegal
No Number Yes LL Illegal
Yes Empty No LL Normal Transparent I/O over leased
line*
Yes Empty Yes LL Normal Transparent I/O over leased
line*
Yes Number No LL Normal Transparent I/O over leased
line, number discard*
Yes Number Yes LL Normal Transparent I/O over leased
line, number discard*
No Empty No CS Error, try to establish service failed
No Empty Yes CS Error
No Number No CS Normal Transparent I/O over Circuit
switched line
No Number Yes CS Normal Transparent I/O over Circuit
switched line
Yes Empty No CS Use current connection for I/O
transfer.
The Empty data 1 will override
priority*
Yes Empty Yes CS Use current connection for I/O
transfer*
Yes Number No CS Due to that line is busy and no
priority set the modem will retry
connection according to <flag>
Yes Number Yes CS Disconnect and dial Number
LL = Leased Line PSTN or ISDN
CS = Circuit Switched PSTN, ISDN or GSM
* The existing data connection will be paused during transparent I/O transfer.
The modem will use the flow control specified by flow control command.
If no flow control set DTE data will be discarded during the Transparent I/O transfer.
When the transparent I/O transfer is terminated by timeout the connection will revert
to data-mode and activate CTS / sending XON.