S-COM 6K Owner's Manual page 172

Examples:
You may re-arrange the priorities of the three receivers and phone line from
the default condition, which assumes that RX3 is a control receiver with the
highest priority. It assumes that the phone line control feature is second,
followed by the repeater receiver (RX1) and then the link receiver (RX2).
In addition to assigning priorities, you may cause the DTMF decoder to
sequentially scan certain (or all) devices. Scanned devices are checked for
DTMF only if no priority devices are active. If DTMF is detected on a scanned
device, the decoder will remain connected to the device until either the device
goes inactive, the DTMF Interdigit Timer expires, or a priority device goes
active.
The more devices you scan, the slower the response to DTMF will be. (Users
may have to hold the first DTMF digit slightly longer to "capture" the decoder.)
There are no priorities within the scan list; whichever device has DTMF first will
capture the DTMF decoder.
If you wish to give the phone line top priority, RX1 next priority, and scan RX2
and RX3, enter this:
(PW) 89 2 5 5 1 *
(NOTE: The 6K supports two receivers, not three, so simply assign a low-
priority code to RX3 in the command.)
6K V2.0 12-14-01
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