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Chapter 4 – Troubleshooting and Frequently Asked Questions
Multi-Tech Systems, Inc. MultiModem CDMA Wireless Modem User Guide 25
Frequently Asked Questions
I just received this modem, what do I need to do?
• You will need to call a carrier and register the ESN number with them. Sprint models (N2) must call Sprint
and Verizon models (N3) must call Verizon. Other models, N1 and N4, must contact their provider.
• You must then activate the modem: We have Sprint and Verizon models that are preconfigured and just
needs to run through the activation steps.
• The N1 models will need more configuration using AT commands in the Reference Guide. If that doesn’t
help, they may need to use the WPST provisioning tool.
• The N4 model uses a RUIM card, similar to a SIM card.
Who are the carriers?
• Sprint, Verizon, and Alltel.
I have the N1 model and I can’t get it activated on my carrier’s network.
• You will need to configure the MDN, MIN, and maybe more settings such as the primary and secondary
channels, and the Home SID and UID.
• The commands are: +WMDN (MDN), +WIMI (MIN), +WPCC (Primary channel), +WSCC (Secondary
channel), +WSID (SID and UID), and +WCMT=1 (to store changes)
• You may need more settings set, so you may need to use the WPST provisioning tool application.
Note: N1 models are usually used for developmental purposes, so the customer will usually be working with a
carrier to get this activated on their network. It is always best for the customer to be working with the carrier
when they are activating a N1 model.
I activated my modem but I can’t do anything with it. When I try to dial out, I get a NO CARRIER response.
• If you are receiving a NO CARRIER response, send ‘AT+CEER’ to check the reason for no carrier, then
check the number in the Reference Guide.
• Make sure the modem is registered and getting good signal: AT+CREG and AT+CSQ.
• Make sure the modem is activated and provisioned correctly.
I am trying to activate my Sprint modem. When I do the ‘AT+WIOTA=1’, I get an error of 1012 back.
• Please check with Sprint to make sure your ESN, MDN, and MS10 are correct. Also, make sure that the
MDN and MS10 were inserted correctly into the modem.
How do I originate a voice or data call?
• ‘ATD<number>;’ for voice call.
• ‘ATD<number>’ for data call.
Why does the modem answer and then do nothing?
• The modem is answering in voice mode.
• If you want to answer a data call, make sure the account has CSD service.
• You will need to set ‘AT+CICB=0’ to make the modem answer in data mode.
When I try to make a data connection by dialing to my analog modem from the wireless, why does the analog
modem answer and send tones, but never connect?
• Make sure you are using the correct dialing string. You must send ‘ATD<number>’ for a data call.
• Make sure the account has CSD service.
How do I get the voice portion to work so that I can talk to others?
• You will need a cable that has the speaker pins connected to a speaker and mic.
• We have a “Y” cable that splits out to a RJ9 connector that can be used to plug into the receiver of a
handset.
• Verizon modems currently do not support voice.