[Asterisk-Users] Re: Tormenta ISA E1 card

[info at itwav.com]

Hi!Steve,
  Thank you for your reply. I think the change for Tor ISA card from T1 to 
E1 might be as following: 

                 T1        E1 

VCXO crystals     6.1756MHz    8.192MHz 

framer chips      DS2151       DS2153 


and the jumper E1-1 and E1-2 should be closed. 

I don't know if what my suspection is right. So,I need your confirm. Think 
you. 


                      john 

 

Steve Underwood writes: 

> Hi John, 
> 
> info at itwav.com wrote: 
> 
>> Hi!Steve,
>> Glad to receive your message. Could you tell me if the card can work
>> properly in Asterisk? and what is the different bettween the Tormenta
>> ISA E1 card and the ISA T1 card (I refer to the hardware). Thanks.
>> john
> 
> The differences between the T1 and E1 versions are the frequency of the
> two VCXO crystals, and part number of the two framer chips. Change those
> to the E1 type and the card functions OK as a clock slave. A hardware
> limitation means it will not perform properly as a clock master. As a T1
> card clock master mode is OK. As an E1 card it isn't. Most people need
> to slave most of the time to the great atomic clock in the PSTN, so this
> isn't such a big limitation. 
> 
> I never tried the card with Asterisk, but it should work for
> CTR4/EuroISDN. I don't think there is support for any other protocols.
> It works OK for the things I do with it, using libPRI and not using
> Asterisk. 
> 
> The differences between 
> 
>> Steve Underwood writes: 
>>
>>> info at itwav.com wrote: 
>>>
>>>> Has any one used it?
>>> 
>>>
>>> Yes! 
>>>
> Regards,
> Steve 
> 
> 
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