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Option Switch Settings
H-18 September 1995 Issue 1
Synchronous 2224A Modem Option
Settings
When the synchronous 2224A modem is used with a modular trunk data module,
set the options on the modular trunk data module as shown in Table H-14. All
factory-furnished options should be set on the 2224A modem with the following
exceptions:
■ Interface speed indication—DUAL-1200/2400
■ Interface speed selection—DUAL-1200/2400
■ Analog (AL) and Test Mode interface assignments—AL-18 and TM-25
■ Interface control remote digital loopback—IN
■ 1200/2400 bps operation—SYNC
■ Transmitter timing—EXT
Table H-14. Option Switch Settings on Modular Trunk Data
Module (MTDM) Used with Synchronous 2224A
Modem
Switch Setting
1200 baud ON
2400 baud ON
SW ON
SIGLS ON
CI12 ON
TM25 ON
CN18 ON
CH23 ON
RL21 ON
SYNC ON
CH19 ON
All Others OFF