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Cisco 819G 3G Problem

Unanswered Question
Jun 4th, 2014
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We have a Problem with a 819G Router 4G (LTE) connection is working but if it fails 3G connection cannot be established.

here is my configuration:


Profile 1 = INACTIVE*
PDP Type = IPv4
Access Point Name (APN) = internet.t-d1.de
Authentication = PAP
Username: t-mobile
Password: tm

chat-script GSM "" "AT!CALL1" TIMEOUT 20

interface Cellular0
 ip address negotiated
 ip nat outside
 ip virtual-reassembly in
 encapsulation slip
 dialer in-band
 dialer idle-timeout 4800
 dialer string GSM
 dialer-group 1
 no peer default ip address
 async mode interactive

ip nat inside source list NAT interface Cellular0 overload
ip route Cellular0

line 3
 script dialer GSM
 modem InOut
 no exec
 transport input all
 transport output all



a short log

*Jun  3 12:49:21.707: Ce0 DDR: place call
*Jun  3 12:49:21.707: Ce0 DDR: Dialing cause ip (s=, d=
*Jun  3 12:49:21.707: Ce0 DDR: Attempting to dial GSM
*Jun  3 12:49:21.707: CHAT3: Attempting async line dialer script
*Jun  3 12:49:21.707: CHAT3: Dialing using Modem script: GSM & System script: none
*Jun  3 12:49:21.707: CHAT3: process started
*Jun  3 12:49:21.707: CHAT3: Asserting DTR
*Jun  3 12:49:21.707: CHAT3: Chat script GSM started
*Jun  3 12:49:21.707: CHAT3: Chat script GSM finished, status = Success
*Jun  3 12:49:23.487: Ce0 DDR: disconnecting call
*Jun  3 12:49:38.487: Ce0 DDR: re-enable timeout

A strange behaviour is no response on the chat script, so when i configure an expected string t runs ito a timeout





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v.duee Mon, 09/01/2014 - 03:04
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Hello, if someone is interested

the modem hardware has changed and supports not longer PPP enc, so Chat script has to be changed

chat-script gsm "" "AT!SCACT=1" TIMEOUT 60 "OK" (for two SIM cards)




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