Serial Port Connection to a Sunfire V880 (having Solaris 10)

Hi,

I'mtrying to connect a Device via the serial port to my Solaris 10 environment (Sunfire V880).
I have setup ttyb to connect to the Device. I am getting a connected status in my Port Listing (Using a separate Module that I have in the app running in the environment) but the moment I try to send data to the device,it says the port is disconnected

The Serial Port Communication settings in the device I am trying to connect is :
Baud Rate : 9600
Number of bits : 8
StopBit : 1
Parity : No parity
Flow Control : Xon/Xoff

This is what I have in my Server Side
ttyb - 9600,8,n,1,-

IS there something missing at any of the ends?
Or is it possible for some other way to establish the connection?