SENA PS810 - Manual (Page 55)

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The DTR option can be set to one of three options:
Always HIGH: The state of the DTR pin is maintained high.
Always LOW: The state of the DTR pin is maintained low.
High when TCP/UDP is opened: The state of the DTR pin will be maintained high if the UDP
connection is established.
The DSR behavior can be set to one of two options:
None: Incoming connection from remote host is always allowed and nothing is done even though
the state of DSR pin changes.
Allow TCP/UDP connection only by HIGH: Pro Series allows incoming TCP connection from
remote host and receives UDP data from the remote host only when the DSR status is high.
However, the connection to the remote host will be disconnected when the DSR status is changed
from high to low regardless of the value of DSR behavior.
Note:
1. DTR/DSR behavior is not effective in RS422 and RS485 mode.
 Phone number to host address mapping table
In modem emulation mode, user can set a specific phone number to host address/port mapping table.
If user set the phone number to host address/port mapping table as shown on Figure 4-8, Pro Series
will try to connect to port 6001 of 192.168.0.100 host by the ‘atdt25737772’ command in modem
emulation mode.
 CONNECT string in non-verbose mode (ATV0) and CONNECT string in verbose mode
(ATV1)
In modem emulation mode, the Pro Series responds to the AT command according to result code in
Table 4-3 by default. But there are some cases that device requires different form of response code
for remote host connection. For example, when the Pro Series connects the remote host, it replies
“1”(if ATV0 command is set) or “CONNECT” (if ATV1 command is set) result code by default. But if
user needs “12” (if ATV0 command is set) or “CONNECT 9600” (if ATV1 command is set) response
for this case, he can get the required result after setting CONNECT strings as shown on Figure 4-8.
 Respond to AT&Cn, AT&Wn and AT&Zn with
For the following three AT commands such as
AT&Cn, AT&Wn and AT&Zn
user can select the response as one of OK or ERROR.
 Command echo delay(ms)
AT commands that are entered by user can be echoed with a delay specified in this menu.
This is useful if user uses modem emulation mode in RS485 mode.