Cisco Cisco 4G LTE Enhanced High-Speed WAN Interface Cards for LATAM Information Guide

 

Q&A 

 

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Page 13 of 19 

Q. 
A. 

I am experiencing ping and connectivity failures. What could be wrong? 
Verify the following: 

● 

Do you have a valid signal? 

● 

Did you verify with your service provider that you have the right account information? 

● 

Is the modem activated? 

● 

Does the modem get an IP address? 

● 

Are your dialer and cellular configurations in place? Verify that all the related configurations 
are in place as documented in the following links: 

◦ 

◦ 

: For GSM 

● 

If you have all the configurations in place, enable the following debugs and verify: 

◦ 

debug modem 

◦ 

debug dialer 

◦ 

debug chat 

◦ 

debug ppp negotiation 

◦ 

debug ppp error 

◦ 

debug ppp event 

Note:   This debug requires you to have enable service internal enabled.) 

Q. 
A. 

My customer is experiencing low throughput on the 3G HWIC (HWIC-3G-CDMA). 
Verify the following: 

● 

Verify if the customer is using the latest IOS image, 12.4(15)T or later. 

● 

Verify with the show cellular x/x/x hardware command that the customer is running the latest 
version of firmware and PRL. 

Note:   You can find the latest PRL and firmware versions at the following link 

. 

● 

Verify with the show cellular x/x/x all command that the modem is connected to the network 
and there is a valid signal. 

● 

Verify if Rev A is enabled. Rev A should be enabled by default on al the modems. Issue the 
show cellular x/x/x network command and check the current service. If it shows "Current 
Service=1xEV-DO (rev A) and 1xRTT", then the Rev A is enabled. 

If it is not, you can enable Rev A by using the following command on the CLI: 

 

test cellular x/x/x cdma rev-a enable 

 

Note:   Ensure that service internal is enabled before executing test commands.