Specifications

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is minimized. The infrared link is a serial connection, which means that the data bits are sent
one after another in a long stream. The IrDAÐSIR Data Link Standard is a protocol that makes
transmission of data faultless. The IrDAÐSIR standard provides a high level of noise immunity,
which means that it is not sensitive to ßuorescent light, sunlight and electromagnetic Þelds. This
makes it suitable for a modern ofÞce environment.
The infrared connection is not always the best solution when connecting to a PC/PDA. Indeed,
it is not always even possible. The DRS-10 cable provides the same connectivity between the
phone and another unit.
The DRS-10 cable supports a subset of the signals in the RS-232 standard, as detailed below.
CC
CC
oo
oo
nn
nn
nn
nn
ee
ee
cc
cc
tt
tt
ii
ii
oo
oo
nn
nn
VV
VV
ii
ii
aa
aa
CC
CC
aa
aa
bb
bb
ll
ll
ee
ee
Signal in RS-232 Support in DRS-10
CD (Carrier Detect) No. Set statically
CTS (Clear To Send) Yes
DSR (Data Service Ready) Statically connected with DTR
DTR (Data Terminal Ready) Statically connected with DSR
GND (Signal Ground) Yes
RI (Ring Indication) No. Set statically
RTS (Request To Send) Yes
Rx (Received Data) Yes
Tx (Transmitted Data) Yes