[asterisk-users] Dahdi+Redfone+Channel Bank+E&M

[Mitul Limbani]

Same for E1 as well unless your operator is giving mfcr2 on cas.

Mitul
On Jul 26, 2012 9:17 AM, "Jorge Mendoza" <jmendozat at tcc.com.pe> wrote:

> Thank you Mitul for your answer.
> Yes, we have tested e&m before and it works. But I don't know why. That is
> what I don't understand. You said that E&M signalling does not have
> separate signalling channel, that is true for the T1 but not for E1. My
> understanding is that E1 CAS pass the E&M information in the bits abcd of
> channel 16, the signalling channel.
> Regards
> --
> Jorge Mendoza
>
> ------------------------------
> *From: *"Mitul Limbani" <mitul at enterux.in>
> *To: *"Asterisk Users Mailing List - Non-Commercial Discussion" <
> asterisk-users at lists.digium.com>
> *Sent: *Wednesday, 25 July, 2012 8:15:25 PM
> *Subject: *Re: [asterisk-users] Dahdi+Redfone+Channel Bank+E&M
>
> E&M signalling do not have seperate signalling channel.
>
> Configure as e&m=1-31
>
> Mitul
> On Jul 26, 2012 6:40 AM, "Jorge Mendoza" <jmendozat at tcc.com.pe> wrote:
>
>> Hi,
>>
>> We are trying to connect an Asterisk server with a Channel Bank with E&M
>> interfaces using a RedFone TDMoE device.
>> The CB have a E1 CAS interface.
>> OS: Ubuntu Server 11.10 64 bits
>> dahdi: dahdi-linux-complete-2.6.1+2.6.1
>>
>> Redfone configuration:
>> /etc/redfone.conf
>>
>> [span1]
>> framing=cas
>> encoding=hdb3
>>
>> System configuration:
>> /etc/dahdi/system.conf
>>
>> dynamic=ethmf,eth0/00:50:c2:65:e0:64/0,31,1
>> dynamic=ethmf,eth0/00:50:c2:65:e0:64/1,31,0
>>
>> e&me1=1-15,17-31
>> dchan=16
>>
>> alaw=1-31
>>
>> loadzone = fr
>> defaultzone = fr
>>
>> Error message:
>> ========================================================
>> # dahdi_cfg -vvvvv
>>
>> Changing signalling on channel 1 from Unused to E & M E1
>> Changing law on channel 1 from Mu-law to A-law
>> DAHDI_CHANCONFIG failed on channel 1: Invalid argument (22)
>> Selected signaling not supported
>> Possible causes:
>>     e&me1 signaling is being used on a T1 line (use e&m)
>>     RBS signaling is being used on a E1 CCS span
>>     Signaling is being assigned to channel 16 of an E1 CAS span
>> =========================================================
>>
>> I don't understand the last possible cause mentioned: "Signaling is being
>> assigned to channel 16 of an E1 CAS span", because the dchan is channel 16.
>> Where is the error?
>> Thank you.
>> --
>> Jorge Mendoza
>>
>> --
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>
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