lease line modem question

[wanchope]

Hi,
When using lease line modem, do i need to use ATA and ATD commands to establish the connection? I heard that DCD will automatic on when data starts transferring and off when transfer stops. Is it true?
thx
wanchope

[wanchope]

Hi, Friends
In the page, http://www.tdksemiconductor.com/products/product_detail.cfm?product_key=22#Application%20Notes
There is a link called'
Using the 73M2901 in Non-Dial Up Applications (27K)'.
I would like to know whether there is a carrier exist when the master tries to poll the slaves? And if i am sending data through a UART to this 73M2901 then to the slaves, is the polling data received at the slaves same as the one i send at the master?
thx in advance
Wanchope