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chat-script command syntax for EHWIC-3G-HSPA+7

I'm trying to configure a Cisco 1941 to use a cell network with a EHWIC-3G-HSPA+7 card

 

It auto generates the following command:

chat-script hspa-R7 "" "AT!SCACT=1,1" TIMEOUT 60 "OK"

 

Most cell configs I've seen use a chat-script similar to the following:

chat-script xxx "" "ATDT*98*1#" TIMEOUT 30 CONNECT

 

Two questions:

a. What is the difference between the two AT commands?

 

b. What is the purpose of 1,1 rather than just 1? I know the profile is selected using the 1, but I can't find any command reference that describes the use of the comma in first example.

 

TIA.......

 

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Hall of Fame Expert

Re: chat-script command syntax for EHWIC-3G-HSPA+7

Hello Renoufi,

generally speaking the chat script is provider specific and depends on specific technology flavor.

 

About your specific question on the chat-script automatically generated.

It is present also in configuration guide for the module

https://www.cisco.com/c/en/us/td/docs/routers/access/1800/1861/software/feature/guide/mrwls_hspa.html#wp1623436

 

Looking for AT messages command reference I have found the following:

AT!SCACT=<state>[,<pid>] is used to set the state of the identified profile (<pid>). If no <pid> is specified, profile 1 is updated.

on page 40 of the following pdf document

https://www.sierrawireless.com/resources/documents/support/2130617_Supported_AT_Command_Reference-v2.4.pdf

 

The document provides also the links to the standards for AT commands that you can find here:

https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1515

the document is very long in its last version 389 pages word document.

 

You can try the proposed chat script that is used for example by T-mobile in Germany see

https://community.cisco.com/t5/routing/reconnection-819-router-after-connection-failure/td-p/1826032

 

Hope to help

Giuseppe

 

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