Guralp Systems CD1.1 - Manual (Page 16)

CD1.1 Tools for Platinum
Note: Unlike other Platinum data reception modules, the CD1.1
receiver module does not currently alter or decode any
subframes it receives and it does not pass them to gdi-base:
they are passed on verbatim and only to the multiplexor
module.
2.4 The CD1.1 sender (data-out-cd11)
This module is a fully standards-compliant CD1.1 sender (DP).
It is responsible for:
•
Receiving CD1.1 channel subframes from the
multiplexor;
•
Assembling them into full CD1.1 frames;
•
Transmitting them over a TCP network to a remote
receiver (DC);
•
Handling retransmission requests originating from its
clients;
•
Monitoring the transmission log to determine whether
any gaps have occurred (for example, due to re-
starting of the sender process) and, if so, transmitting
the missing packets (back-fill);
•
Logging all transmissions to a “frame list” held on local
disk or Flash memory; and, optionally,
•
Digitally signing the frames using an optional hardware
encryption engine (see chapter 10 on page 67).
16 Issue C