Ascend Archive
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RE: (ASCEND) caller-id on POTS port of new P75
At 07:11 PM 10/1/97 -0700, Matt Holdrege wrote:
>At 05:34 PM 10/1/97 -0400, Clifford Donley wrote:
>>Yes, they will fail. The P75's implementation of the relevant Bellcore
>>specs is incomplete and improperly done.
>
>Exactly how is it incomplete? Can you give references? Let us know exactly
>how it doesn't work in your area and we can open a trouble ticket on it. My
>Caller-ID devices receive and display the number fine.
I shouldn't write such strong words at the end of a long day; I apologize.
The failure to report the time problem is significant, but not crippling.
What does cripple the implementation is erroneous reporting of calls from
long-distance areas that don't pass IDs as being blocked rather than being
unavailable. There is one specific byte that controls how the CID display
categorizes the incoming call. It's an ASCII 'O' if the number is
unavailable or an ASCII 'P' if privacy has been invoked. They are passed as
the first character of the telephone number field.
For those who care about such mundane things, I've attached a graphic
showing how the fields are constructed.
CallerID.gif
References:
