Configuring lines 1 60 on Cisco 2821

Hi all,
I'd like to know what is necessary to configure the parameter line 1 60 in a Cisco 2821 router with a two E1's direct connected in a interfaca VWIC2-MFT-E1 and two PVDM's modules installed.
When I try to enter the line "router(config)#line 1 60" the ios returns an error message that there are no physical hardware to support "line 2". I just can enter line 1.
Which is necessary to do this?
My best Regards,
Adriano

try to do a show of the interface using the following example and see the output.
#sh voice po 1/1

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Configuring lines 1 60 on Cisco 2821

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