AT COMMANDS-USSD仅返回OK [英] AT COMMANDS - USSD returns only OK

问题描述

我已经购买了ZTE MF667 GSM调制解调器，并且我正在使用超级终端发送AT COMMANDS，例如USSD出现问题:

I have bought ZTE MF667 GSM Modem and i am using Hyper Terminal to send AT COMMANDS, i have a problem with USSD e.g :

AT+CUSD=1,"*111#",15 (to check balance) but it returns only OK

AT+CUSD=1,"*111#" returns only OK

我已经测试了另一台工作正常的AT COMMADS

I have tested another AT COMMADS which work fine like

AT+CMGL="ALL" to read SMS (WORKS)

请问如何解决该问题?

推荐答案

首先，USSD消息与SMS非常相似，因为消息是从移动设备发送到运营商网络的.这意味着，当您在移动设备上执行USSD命令时，您将不会立即收到响应，因为运营商网络的USSD服务必须回答您的消息.这解释了为什么您只收到USSD命令的确定"答案. "OK"基本上是在告诉您USSD命令语法是有效的，并且USSD命令已从您的移动设备发送到运营商网络，仅此而已.

First of all USSD messages are fairly similar to SMS in that a message is sent from the mobile device to the operator network. This means when you execute a USSD command on your mobile device you will not receive an immediate response as the operator network's USSD service must answer your message. This explains why you receive only a "OK" answer to your USSD command. The "OK" is basically telling you the USSD command syntax was valid and a USSD command was sent from your mobile device to the operator network, nothing more.

第二，USSD命令响应将作为未经请求的响应返回，因此不会与您的SMS一起存储.

Secondly as USSD command responses will be returned as an unsolicited response and therefore will not be stored alongside your SMS's.

维基百科对此的引用:

USSD通常与实时或即时消息传递服务关联.没有像SMS之类的其他短消息协议所特有的存储转发功能.

USSD is generally associated with real-time or instant messaging services. There is no store-and-forward capability, as is typical of other short-message protocols like SMS.

具体解决您的问题，我要么认为运营商网络的响应速度都非常慢.或者，您发送的获取余额"命令对于您的运营商网络而言是不正确的.我建议检查您的运营商网络网站，以检查获取余额" USSD命令代码.

Addressing concretely your problem I would either assume that the operator network is being incredibly slow in responding. Or alternatively the "get balance" command you are sending is incorrect for your operator network. I would recommend checking your operator networks website to check the "get balance" USSD command code.

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