[asterisk-ss7] often receives BAD FCS errors

[Torrey Searle]

When the clocks are not properly configured, they go out of sync,
causing frame slips and corruption of data.

Torrey

2011/4/21 黄东涛 <tprax634 at hotmail.com>:
> Hi,
>    Amazing,it works. Thx a lot. But why does it always appears FCS errors
> when TE_CLOCK value is MASTER?
>
>> Date: Wed, 20 Apr 2011 17:13:02 +0200
>> From: tsearle at gmail.com
>> To: asterisk-ss7 at lists.digium.com
>> Subject: Re: [asterisk-ss7] often receives BAD FCS errors
>>
>> try changing
>>
>> TE_CLOCK to slave
>>
>> Torrey
>>
>> 2011/4/20 黄东涛 <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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>>
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