Wavecom WMOD2B Uživatelský manuál stáhnout pdf (Strana 18)

B) Additional hints

❏ Is the antenna properly connected?

Use an antenna with the following features:

➫ Frequency range : dual-band GSM 900/1800 MHz.

➫ Impedance : 50 Ohms.

➫ Gain (antenna + cable) : 0dBi.

➫ VSWR (antenna + cable) : -10dB.

❏ Is the received signal strong enough?

➫ With the AT-Command AT+CSQ check that the received signal (1

parameter of the response) is strong

enough to be able to establish a call.

* based on general observations.

❏ The modem always returns «No carrier» when trying to issue a voice communication?

➫ Insure the character «semicolon» is present straight after the phone number on the AT-Command

ATD######;

❏ The modem always returns «No carrier» when trying to issue a data communication?

➫ Insure the selected bearer type is supported by the called party.

➫ Then, insure the selected bearer type is supported by the Network.

➫ If no success, try bearer selection type: AT+CBST=0,0,3.

➫ Insure the SIM Card is available for Data/Fax calls.

5.4 Further questions

For further troubleshooting information, please check our Frequently Asked Questions on www.wavecom.com (customer

support section).

TROUBLESHOOTING

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Wavecom WMOD2B Uživatelský manuál Strana 18