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

renoufi
Beginner
Beginner

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.......

 

1 Reply 1

Giuseppe Larosa
Hall of Fame Master Hall of Fame Master
Hall of Fame Master

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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