Multi-Tech Systems MTCBA-G-F2 - Manual (Page 48)

Troubleshooting
48
Solutions for “no carrier” message (cont’d)
If the
modem
returns Then ask … Action
no carrier
(esp. for
voice
communi-
cation) Be sure that the
semicolon character (“;”)
is typed immediately
after the phone number
in the AT command. E.g.,
ATD######;
type AT+CBST=0,0,3
Configure the SIM card
for data/fax calls.
Is the received
signal strong
enough? See “ Signal Strength
Verification,” page 38.
Is the antenna
properly
connected? See “ Antenna
Specifications,” page 8.