The SRX multidrop polling multiplexer host can be attached to a line using modem sharing units. When more than one SRX-32 is used at the host, it is important to balance out the number of drops, so each SRX host has approximately the same number of remotes. This allows the sharing unit to evenly switch the transmit from one SRX host to the other.
Ubalanced drops cause excessive delays for some users.
Drop 5 gets polled 4 times as often because the two SRX hosts are both contending for the line. Polls from the SRX, and the related RTS, alternate by drop number. The line sharing resolves this SRX contention for the line by scanning the RTS inputs sequentially. Suppose in the above example, the time for a poll and response was 30 milliseconds. Users at drop 5 could then see a response to a key press, or character echo, in 90 to 120 milliseconds.