N O V A T E L W I R E L E S S T E C H N O L O G I E S L T D .
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A T C o m m a n d S p e c i f i c a t i o n - E x p e d i t e a n d M e r l i n
W i r e l e s s I P M o d e m s
Local IP Address/Port
Description:
Since the modem connects directly to the Internet, it needs to have an IP address to define where data
destined for it can be sent. The two methods for defining IP addresses are static and dynamic. Dynamic
IP addresses are assigned to the modem each time the modem connects to the network. Dynamic IP
addressing poses several disadvantages with messaging services. These difficulties are overcome with
Static IP addressing which is used by the Expedite Wireless IP Modem. Register S110 is reserved for
specifying the IP address for the NRM. The optional ‘port extension’ is the TCP/UDP port number used to
further identify the Host application for the connection-oriented service.
The IP address must be specified before the modem can register with the network. Please contact your
network provider to receive your IP address. This number is assigned to the modem and must remain
unique; you cannot load the same IP address into more than one modem and have them work. The IP
address cannot be ported or transferred to another modem without alerting your issuing carrier of the
change and the associated Electronic Identifier (EID) numbers of the modems.
Once registered on the Network, the EID and IP must remain in the same modem until the Network is told
to “Trust enable” the modem or “Reset Authentication Parameters” for the modem. During initial
registration of the modem, first time registration, the typical process has the Network accepting the
modem’s EID without checking it and henceforth using that value along with the IP and authentication
keys. This will remain in effect until the Network administrator is instructed to change the IP, EID or reset
the credentials.
Format:
ATS110?
IP Address and Port
ATS110=<Address>/<port>
To set the IP address
Where:
<address> = IP address: xxx.xxx.xxx.xxx
<port> = TCP/UDP port number [1 - 65535]
Example command
ATS110=207.107.0.35/2014
IP address is 207.107.0.35
Port number is 2014
This port number is used for “listening” in UDP-Data mode.
Validity:
The IP address can only be changed in Program mode.
Other Considerations:
An IP address consists of 4 numbers, 0 to 255, separated by dots (periods). For IP addresses that
contain zero as one of the numbers, you must enter the zero as part of the IP address as shown in the
example above. An IP address must have four numbers to be valid. Numbers must be limited to 0 to 255
in value. Check with your carrier before making any changes to your IP address setting.
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This address/port combination is used when the NRM opens the TCP port for listening.
