Velodyne SC-600 IFC - INSTALLATION REV A Installation Manual download pdf (Page 54)

54 6195-2201

8.3 The modems always return “No carrier”

when trying to issue a communication

a) After s failed attempt (no carrier”), issue AT+CEER to have extended error cause

b) Is the received signal strong enough?

Use AT+CSQ commands to check that the signal is strong enough to establish

a connection.

• 1–10 Could be insufficient

• 11–33 Should be sufficient

• 99 Insufficient

c) Insure the selected bearer type is supported by the called party.

d) Then, insure the selected bearer type is supported by the network.

e) If no success, try bearer selection type: AT+CBST=0,0,3

f) Use the AT-command AT+GCAP to insure the SIM card is available for data/fax calls.

This command gives the complete capabilities list.

Cause value Diagnostic Hint

1 Unallocated phone number

16 Normal call clearing

17 User busy

18 No user responding

19 User alerting, no answer

20 Call rejected

21 Number changed

31 Normal, unspecified

50 Requested facility not subscribed Check your subscription

(data subscription available)

68 ACM => ACM max Credit of your pre-paid

SIM card expired

252 Call baring on outgoing calls

253 Call baring on incoming calls

3,6,8,29,34,

38,41,42,43, See AT command manual for further details

44,47,49,57, or call network provider

58,63,65,69

70,79,254

1 2 ... 49 50 51 52 53 54 55 56

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Velodyne SC-600 IFC - INSTALLATION REV A Installation Manual Page 54