Manual

Smart Machine Smart Decision
SIM800 Series_AT Command Manual_V1.09 374 2015-08-03
SIM800C-DS.
The default gain level of aux audio channel is 9 in SIM800V, SIM840V, SIM800W, SIM840W,
SIM800W16 and SIM840W16.
The default gain level of aux audio channel is 8 in SIM800C, SIM800A and SIM800F.
21.3 AT+CBAND
SIM800V, SIM800W,SIM800W16,SIM800A SIM840V,SIM840W,SIM840W16,SIM800H,SI
M800L, SIM800,SIM800M64,SIM800G,
SIM808,SIM800C,SIM800F,SIM800C-DS
AT+CBAND=?
+CBAND:
(EGSM_MODE,DCS_MODE,EGSM_DCS
_MODE,ALL_BAND)
OK
AT+CBAND=?
+CBAND:
(EGSM_MODE,DCS_MODE,GSM850_MOD
E,PCS_MODE,EGSM_DCS_MODE,GSM850
_PCS_MODE,EGSM_PCS_MODE,ALL_BAN
D)
OK
Difference:
SIM840V, SIM840W, SIM840W16,SIM800H, SIM800L, SIM800, SIM800M64, SIM800G,
SIM808, SIM800C, SIM800F and SIM800C-DS support Quad-band.
21.4 AT+CHFA
SIM800V, SIM840V,SIM800W,
SIM840W,SIM800W16,SIM840W16
SIM800H,SIM800L,SIM800,SIM800M64,
SIM808,SIM800C,SIM800A
AT+CHFA=?
+CHFA: (0 = NORMAL_AUDIO, 1 =
AUX_AUDIO)
OK
AT+CHFA=?
If it is SIM800 and SIM800M64
+CHFA: (0 = NORMAL_AUDIO, 2 =
HANDFREE_AUDIO,4=PCM_AUDIO)
OK
If it is SIM800H,SIM800L, SIM808 or
SIM800C-DS
+CHFA: (0 = NORMAL_AUDIO, 1 =
AUX_AUDIO, 2 = HANDFREE_AUDIO,
3 = AUX_HANDFREE_AUDIO, 4 =
PCM_AUDIO)
OK
If it is SIM800C,SIM800A,SIM800F
+CHFA: (0 = NORMAL_AUDIO, 2 =