Terminus T3 User Guide JA19-UM
Page 11 Rev: 00 Date: 05/25/17
© Copyright 2017 Janus Remote Communications
Specifications subject to change without notice
All Rights Reserved See website for latest revision. Not intended for life support applications.
Getting started with the T3 continued
Starting a Terminal Session continued
Step 4
Click on the “Call” button in HyperTerminal to make the connection. In the window you should now be able to
send AT commands. To make sure you have a proper connection, type “AT” into the window (without quotes), and
press Enter. You should receive a response of “OK”.
If you do not receive that response, go back and check to make sure you’ve selected the correct COM port, as
well as the settings.
Step 5
The next thing is to set the modem for proper operation and wait for registration. Although the modems are
factory set by default to work in a wide range, ensuring these are set is still a good idea.
GSM and HSPA
For T-Mobile & MVNO
•
AT#SELINT=2 – This makes use of the most recent AT command set
•
AT#ENS=1 – Ensures some automatic settings used
CDMA and EVDO
These units require some extra steps that are thoroughly detailed in our Provisioning App Note found here:
http://www.janus-rc.com/Documentation/JA01-AN111_Provisioning-CDMA.pdf
Step 6
Check the network status by entering “AT+CREG?” without the quotations and press ENTER.
The response will be +CREG: 0,1 or +CREG: 0,5 meaning the device is registered to the home network or
roaming, respectively. If the response is different than this please refer to the AT Command guide as well as verify
the account is active.
Step 7
Check the signal quality by entering “AT+CSQ” without the quotations and press ENTER.
The response will be +CSQ: <rssi>,<ber>
<rssi> Signal Strength
99
Not known or detectable
0-31
dBm = (rssi*2) – 113
Example: A result of 31 indicates -51dBm or greater.
An rssi value of >=10 in typical applications if fine and you will usually see about 12-20 in normal to good signal,
but note that worst case it can be lower but still register and perform normal functions.
Sending an SMS
SMS (Select Message Service) mode allows you to send a text message (max 160 characters) to an SMS capable
subscriber unit.
•
Set the SMS mode to text. This must be entered every power cycle.
AT+CMGF=1<cr>
•
To enter the receiving subscriber unit phone number and message enter:
AT+CMGS=”8885551234”
Wait for response”>” then enter message text
Enter “ctrl z” <cr> to end the message
