SI3015-FS Silicon Laboratories Inc, SI3015-FS Datasheet - Page 34

• Manufacturer Part Number: SI3015-FS
• Description: SI2400 ISOMODEM LINE-SIDE
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3015-FS

• Data Format: V.90
• Interface: Serial
• Voltage - Supply: 3.3 V ~ 5 V
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Baud Rates: -

Si2400
echoes only after the Si2400 detects the Handshake
Tone and the speed synchronization signal is sent. The
signaling is at 300 bps half-duplex FSK. The host can
send the first SIA block after the “c” is received. Once
the block is transmitted, the modem can monitor for the
acknowledge
sequence:
1. Place the Si2400 in the command mode by pulsing the
2. Issue the “ATX1” command to turn the modem transmitter
3. Monitor for a positive (negative) acknowledgment “P” (“N”)
4. The modem, still in command mode, can be placed online
This sequence can be repeated for long messages.
!7
The “!7” mode is a field-configurable tone-on/tone-off
messaging protocol for the alarm industry. There are
many proprietary standards that necessitate a flexible
alarm protocol. The “!7” command fills that need with
programmable usage and timing.
The “!7” mode is entered by issuing the “ATDT<phone
number>!7<message><CR> After the Si2400 connects
to the alarm receiver, it waits for a Handshake Tone
(equivalent to an answer tone). When a valid
Handshake Tone is received a “c” (connect) is echoed
to the host and the message is sent. The Si2400
echoes a “,” to the host signaling the message is sent,
additional messages can be received from the host and
to mark the start of the intermessage time. The end of
the intermessage time is marked by the “N” result code.
The Si2400 monitors for the Kissoff Tone from the alarm
receiver which acknowledges receipt of the message.
The Si2400 echoes a “K” to indicate the Kissoff Tone
was received or a “^” to indicate it has not been
received prior to the timeout set by S36[3:2] (IDKT).
Register S36 is reconfigured from SKDTL (Second
Kissoff Tone Detector Length) as used in A1 and !1
modes to Alarm 1, a bit-mapped register, in the “!7”
mode. Register S1F is reconfigured from ATTD (Answer
Tone to Transmit Delay) to Alarm3, a bit-mapped
register, in the “!7” mode. S38(Alarm 2) is a bit-mapped
register only used in “!7” mode. The following is a
34
ESCAPE pin (Si2400 pin 14). The “+++” and “ninth-bit”
escape modes will operate in the “!2” mode but are not
recommended because they can send unwanted
characters to the remote modem.
off and begin monitoring for the acknowledgment tones.
after the tone has been detected for at least 400 msec.
as a transmitter by issuing the “ATX2” command or a
receiver by issuing the “ATX3” command. If tonal
acknowledgement is not used, the host can toggle the
ESCAPE pin to place the Si2400 in the command mode
and issue an “ATX2” or an “ATX3” command to reverse
data direction.
tone
by
completing
the
following
Rev. 1.1
summary of commands, result codes and S-Registers
encountered in the “!7” mode.
Basic Command
ATDT<phone number>!7<tone pulse digits 0-9, B-
F><CR>
Result codes after dialing
t
,
r
b
c
N
Result codes after “c” received
,
K
^
N
Message sent—start of intermessage time
Kissoff Tone detected in S36[3:2] (IDKT)
time window and present for S38[4:2] (HMT)
msec
Kissoff Tone not detected per above
Intermessage timeout defined in S36[3:2]
(IDKT) elapsed. A second message received
after the “,” is sent at this time.
Dial tone detected
Phone
intermessage time
Ringback tone detected
Busy tone detected
Handshake Tone detected in S39 (CDT)
time window and present for S38[4:2]
(HMT) msec
Handshake Tone not detected per above
number
dialed—start
of
initial