Data Sheet

Smart Machine Smart Decision
21.3 AT+CBAND
SIM800V, SIM800W,SIM800W16 SIM840V,SIM840W,SIM840W16,SIM800H,SI
M800L, SIM800,SIM800M64,SIM800G,
SIM808
AT+CBAND=? AT+CBAND=?
+CBAND: +CBAND:
(EGSM_MODE,DCS_MODE,EGSM_DCS (EGSM_MODE,DCS_MODE,GSM850_MOD
_MODE,ALL_BAND) E,PCS_MODE,EGSM_DCS_MODE,GSM850
_PCS_MODE,EGSM_PCS_MODE,ALL_BAN
OK D)
OK
Difference:
SIM840V, SIM840W, SIM840W16,SIM800H, SIM800L, SIM800, SIM800M64, SIM800G and
SIM808 support Quad-band.
21.4 AT+CHFA
SIM800V, SIM840V,SIM800W, SIM800H,SIM800L,SIM800,SIM800M64,
SIM840W,SIM800W16,SIM840W16 SIM808
AT+CHFA=? AT+CHFA=?
+CHFA: (0 = NORMAL_AUDIO, 1 = If it is SIM800 and SIM800M64
AUX_AUDIO) +CHFA: (0 = NORMAL_AUDIO, 2 =
HANDFREE_AUDIO,4=PCM_AUDIO)
OK
OK
If it is SIM800H,SIM800L and SIM808
+CHFA: (0 = NORMAL_AUDIO, 1 =
AUX_AUDIO, 2 = HANDFREE_AUDIO,
3 = AUX_HANDFREE_AUDIO, 4 =
PCM_AUDIO)
OK
Difference:
In SIM800H, SIM800L and SIM808, channel 2 is the same with channel 0, channel 3 is the
same with channel 1.channel 4 is multiplexed.
SIM800G can not support this AT command.
SIM800 Series_AT Command Manual_V1.05 363 2014-07-31