Which of the following are the more stable types of industrial SMS cats?

Industrial-level SMS cat is a messaging cat device using the original module of French Wavecom. For example, q2303a, q2403a, and q2358c are common. q2303a is for gsm sms cat equipment and q2403a is for gprs sms cat, the difference between the two models is that the gprs sms cat supports SMS and MMS, and the performance is more stable than that of GSM. Q2358c is the corresponding cdma sms cat. It supports China Telecom card because of the software compatibility issues related to supporting cdma sms cat. It is used for secondary development to send and receive SMS messages no better than GSM. Therefore, the stable priority of several industrial-level SMS cats is: gprs sms cat (q2403a)> gsm sms cat (q2303a)> cdma sms cat (q2358c)

 

Describe the industrial level SMS cat products as follows:

Single-port gsm sms cat, serial SMS cat uses nine-pin com serial port connection, for example, single-chip microcomputer, industrial fields, etc., stable performance, professional for SMS cat secondary development and application, to achieve the function of sending messages.

Chip: q2303a, 2c, 2C2)
Purpose: SMS sending and receiving in industrial fields (such as monitoring and alarm), software development (such as OA and ERP system short message function integration)

 

The single-port GPRS Modem MMS cat, also known as the "MMS group sending Agent", can be used in combination with the MMS group software for SMS Group Sending, and supports Secondary Development of MMS cats.

Chip: q2403a

Function: supports the secondary development of MMS and MMS cats.

 

 

The single-port cdma sms cat uses China Telecom's mobile phone card and supports the Second Development of SMS group and cdma sms cat.

Chip: q2358c

Function: supports text message sending and receiving and Secondary Development of cdma sms cats

 

Which of the following are the more stable types of industrial SMS cats?