Ascend Archive
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Re: (ASCEND) ISDN w/o PRI?
A 56K call over an ISDN circuit transits the network using the CSD (circuit
switched data) protocol. This protocol can be carried over any 56K access
line whether ISDN or not. So the switch does the translation from ISDN to CSD.
At 10:35 AM 3/17/98 -0500, Martin Hannigan wrote:
>
>
>Matt,
>
>Can you go into technical detail on how this works? Frankly,
>I'm surprised. I'm sure after the explanation I may not be
>though.
>
>Thanks.
>
>/M
>
>
>
>>
>> At 08:46 PM 3/16/98 -0800, Wes Parker wrote:
>>
>> >>>>
>>
>> <excerpt><smaller>We have a Max4004 with 3 channelized T1's for our 56k
>> modems. We now want to try beta testing ISDN dialup users, but were told
>> by Ascend tech support that we had to provision PRI instead of the T1's.
>> Is this in absolute requirement, or is only Ascend's recommended
>> configuration?
>>
>> </smaller>
>>
>> <smaller>Appreciate your advice.
>>
>> </smaller>
>>
>>
>>
>> </excerpt><<<<<<<<
>>
>>
>> You can use T1 lines to accept calls from an ISDN BRI or PRI. But they
>> are 56K only. 64K calls won't go through. This is also only good in the
>> U.S.
>>
>>
>>
>> Matt Holdrege http://www.ascend.com matt@ascend.com
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>>
>
>
Matt Holdrege http://www.ascend.com matt@ascend.com
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References: