Check your CPU Usage and try disabling echo cancelation.
De: asterisk-ss7-bounces at lists.digium.com
[mailto:asterisk-ss7-bounces at lists.digium.com] Em nome de bipin singh
Enviada em: sexta-feira, 22 de abril de 2011 1:29
Para: asterisk-ss7 at lists.digium.com
Assunto: Re: [asterisk-ss7] often receives BAD FCS errors
Hi,
Check your chan_dahdi.conf setting some things is wrong .
2011/4/20 ??? <tprax634 at hotmail.com>
Hi,
Anybody knows why my mtp2 link works fine but continuously appears BAD FCS
errors? What causes this error?
Here is my conf:
1.dahdi/system.conf
loadzone=us
defaultzone=us
#Sangoma A102 port 1 [slot:4 bus:4 span:1] <wanpipe1>
span=1,1,0,ccs,hdb3,crc4
bchan=1-15,17-31
mtp2=16
#Sangoma A102 port 2 [slot:4 bus:4 span:2] <wanpipe2>
span=2,2,0,ccs,hdb3,crc4
bchan=32-46,48-62
mtp2=47
2.wanpipe/wanpipe1.conf
[devices]
wanpipe1 = WAN_AFT_TE1, Comment
[interfaces]
w1g1 = wanpipe1, , TDM_VOICE, Comment
[wanpipe1]
CARD_TYPE = AFT
S514CPU = A
CommPort = PRI
AUTO_PCISLOT = NO
PCISLOT = 4
PCIBUS = 4
FE_MEDIA = E1
FE_LCODE = HDB3
FE_FRAME = CRC4
FE_LINE = 1
TE_CLOCK = MASTER
TE_REF_CLOCK = 0
TE_SIG_MODE = CCS
TE_HIGHIMPEDANCE = NO
TE_RX_SLEVEL = 430
LBO = 120OH
FE_TXTRISTATE = NO
MTU = 1500
UDPPORT = 9000
TTL = 255
IGNORE_FRONT_END = NO
TDMV_SPAN = 1
TDMV_DCHAN = 0
TE_AIS_MAINTENANCE = NO #NO: defualt YES: Start port in AIS Blue
Alarm and keep line down
#wanpipemon -i w1g1 -c Ttx_ais_off to
disable AIS maintenance mode
#wanpipemon
-i w1g1 -c Ttx_ais_on to enable AIS maintenance mode
TDMV_HW_DTMF = NO # YES: receive dtmf events from
hardware
TDMV_HW_FAX_DETECT = NO # YES: receive fax 1100hz
events from hardware
HWEC_OPERATION_MODE = OCT_NORMAL # OCT_NORMAL: echo cancelation
enabled with nlp (default)
# OCT_SPEECH: improves software tone detection by disabling NLP (echo
possible)
# OCT_NO_ECHO:disables echo cancelation but allows VQE/tone functions.
HWEC_DTMF_REMOVAL = NO # NO: default YES: remove dtmf out of
incoming media (must have hwdtmf enabled)
HWEC_NOISE_REDUCTION = NO # NO: default YES: reduces noise on the
line - could break fax
HWEC_ACUSTIC_ECHO = NO # NO: default YES: enables acustic echo
cancelation
HWEC_NLP_DISABLE = NO # NO: default YES: guarantees software tone
detection (possible echo)
HWEC_TX_AUTO_GAIN = 0 # 0: disable -40-0: default tx audio level
to be maintained (-20 default)
HWEC_RX_AUTO_GAIN = 0 # 0: disable -40-0: default tx audio level
to be maintained (-20 default)
HWEC_TX_GAIN = 0 # 0: disable -24-24: db values to
be applied to tx signal
HWEC_RX_GAIN = 0 # 0: disable -24-24: db values to
be applied to tx signal
[w1g1]
ACTIVE_CH = ALL
TDMV_HWEC = NO
MTU = 8
--
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BIPIN RAGHUVANSHI
OPERATION HEAD
ASTERISK (DEVELOPMENT AND RESEARCH)
WWW.EHORIZONS.IN
011-32323262
011-46334633
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