ISDN PRI Voice Capable

Answered Question
Jun 8th, 2009
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Which of the following ISDN PRI interfaces are capable for both voice and data:


NM-1CE1T1-PRI


HWIC-2CE1T1-PRI


VWIC2-2MFT-T1/E1


It would be installed on an 2801 router.

Correct Answer by paolo bevilacqua about 8 years 2 weeks ago

The VWIC supports ISDN for voice.

Remember you will also need PVDM2-xx.

No voice configuration can be done without it.

Correct Answer by slmansfield about 8 years 2 weeks ago

If I am not mistaken, of the three options only the VWIC is supported on the 2801. It is voice and data capable.


http://www.cisco.com/en/US/prod/collateral/routers/ps5855/product_data_sheet0900aecd8028d2db.html

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oinojosa12 Mon, 06/08/2009 - 13:36
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I have read that data sheet already, but I do not see any clear mention about ISDN.

Correct Answer
paolo bevilacqua Mon, 06/08/2009 - 13:39
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The VWIC supports ISDN for voice.

Remember you will also need PVDM2-xx.

No voice configuration can be done without it.

slmansfield Tue, 06/09/2009 - 07:44
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You may need additional memory depending on how many modems you want. When I used the Dynamic Configuration tool I got this message:


Please refer to the DSP Calculator at the following URL to make sure you have selected enough PVDM resources: http://cisco-images.test.edgekey.net/cgi-bin/Support/DSP/dsp-calc.pl. Note, Cisco 2801 supports maximum 30 digital voice calls with VWICs.

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