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1760 with 4 VIC2-4FXO

I want to use four FXO in a Router 1760, but I saw a limitation in the web that said:

“Restrictions on VIC2-4FXO Usage

When configured for operation in countries that use the TBR21 mode, the use of VIC2-4FXO cards is subject to the following limitations.

· In the Cisco 1751 router, a maximum of one VIC2-4FXO card can be supported.

· In the Cisco 1760 router, a maximum of two VIC2-4FXO cards can be supported.

When not operating in the TBR21 mode, these limitations do not apply.

These restrictions do not apply to VIC2-2FXO cards”

I have to install this equipment in Argentina but I don’t know if that apply here.


Cisco Employee

Re: 1760 with 4 VIC2-4FXO

TBR21 is current limiting mode used in europe:

Use in Europe (TBR21 certification) requires modem firmware 1.0.1 and Cisco IOS Version 11.3(5)T or 12.0(1)T. You must load the modem microcode in addition to the Cisco IOS software.

For European countries, configure modem country microcom europe (this selects TBR21 operation). Country code "europe" requires Cisco IOS Version 11.3(5)T or 12.0(1)T.

You should not be in TBR21 mode in Argentina.

Hope this helps....