Related Manuals for W&T RS232 88256
Summary of Contents for W&T RS232 88256
- Page 1 W&T RS232 Serial Buffer Manual RS232 Serial Buffer Models 88102 88256 88257 88409 W&T 88410 Release Subject to error and alteration...
- Page 2 W&T RS232 Serial Buffer © 12/2002 by Wiesemann & Theis GmbH Subject to errors and changes: Since we can make mistakes, none of our statements should be used without checking. Please let us know of any mistakes or misunderstandings you are aware of, so that we can recognize and eliminate them quickly.
- Page 3 W&T RS232 Serial Buffer RS 232 Serial Buffer W&T RS232 Serial Buffers are used for fast buffering of serial data between an RS232 data transmitter and RS232 receiver. Function The buffer works bi-directionally at a maximum transmission rate of 115.2kbps and allows separate configuration of the in- put and output port with respect to transmission speed, data format and handshake procedure.
- Page 4 W&T RS232 Serial Buffer Modes In standard mode (S1.8 = „off“) the RS232 Serial Buffer func- tions like a data buffer using a FIFO principle. The data leave the buffer on the output in exactly the same order as they were written to the buffer by the computer.
- Page 5 W&T RS232 Serial Buffer Diagnostics Starting up an RS232 port is often problematical, since both the pin assignments and the transmission parameters need to be correct in order to ensure error-free data transmission. To check the configuration the Serial Buffer provides two functions, the settings dump and the Power/Error LED, which can be very use- ful during installation.
- Page 6 W&T RS232 Serial Buffer Power-/ Error-LED The Power LED of the buffer is normally constant-on after pow- ering up the device. If this LED starts flashing during operation, this indicates an incorrect data format setting. The buffer indi- cates detected parity and frame errors by flashing the Power LED.
- Page 7 W&T RS232 Serial Buffer Technical data Capacity: 256KB, 1MB, 4MB Baud rate: 50..115200 baud Data format: 7,8 data bits, no, even, odd Parity Flow control: Hardware-Handshake or XON-/XOFF protocol Code conversion: Single code conversion in both directions using EPROM patch Supply voltage: AC adapter (included) Current draw:...
- Page 8 W&T RS232 Serial Buffer...
- Page 9 W&T RS232 Serial Buffer RS232 Serial TC buffer W&T RS232 billing data buffers are used for buffering call and billing data between telephone equipment and the evaluating Function The TC buffers are especially adapted versions of the standard buffer for use with telephone equipment: The buffer output port is always disabled after power-up so that incoming data are not lost after a buffer reset.
- Page 10 W&T RS232 Serial Buffer Pin assignments and buffer connection The buffer input is implemented as a 25-pin SUB-D socket with DTE function, so that as a rule any standard serial printer cable can be used between the TC system and the buffer. The buffer output uses a 2m long serial cable with a 9-pin SUB-D female using DCE at its end, which can be plugged directly in to the COM port of a PC.
- Page 11 W&T RS232 Serial Buffer Start of data transmission The command 1Bh 02h 0Dh outputs all the incoming data. Data flow control is handled according to the handshake procedure set on Switches S2.1 and S3.1. Stopping data transmission The command 1Bh 03h 0Dh disables the output port. All in- coming data are stored.
- Page 12 W&T RS232 Serial Buffer First „ATDS=0“ + CR is output. This command causes the con- nected modem to dial the call number contained in its speed call location 0 (see modem manual). Now the buffer expects the identification command within 60s. If this does not arrive, the buffer sends a „ATHO“...
- Page 13 W&T RS232 Serial Buffer Technical data Capacity: 256KB, 4MB Baud rate: 50..115200 Baud Data format: 7,8 data bits, no, even, odd Parity Flow control: Hardware-Handshake or XON-/XOFF protocol Code conversion: Single code conversion in both directions using EPROM patch Supply voltage: 5V regulated Current requirements: approx.
Need help?
Do you have a question about the RS232 88256 and is the answer not in the manual?
Questions and answers