POTS lines for Cisco VOIP

I have a regular POTS line at my House and I also have a Cisco 2611XM router. What software and or hardware do I need to get for the Cisco router to have VOIP. I would like to connect the router to the POTS line and have VOIP internal on my network. Just wanting this for a hobby and eventually a Cisco certification.
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Istvan KalmarHead of IT Security Division Commented:

you need WIC-2FXO card and voice IOS, please show us the 'sh ver'

Best regards,

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alg205Author Commented:
Cisco IOS Software, C2600 Software (C2600-ENTBASE-M), Version 12.3(14)T7, RELEASE SOFTWARE (fc2)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2006 by Cisco Systems, Inc.

Compiled Wed 22-Mar-06 17:11 by pwade

 ROM: System Bootstrap, Version 12.2(7r) [cmong 7r], RELEASE SOFTWARE (fc1)

Router#1 uptime is 4 minutes

System returned to ROM by power-on

System image file is "flash:c2600-entbase-mz.123-14.T7.bin"

Cisco 2621XM (MPC860P) processor (revision 0x100) with 127308K/3764K bytes of memory.

Processor board ID JAD065008DG (4057372561)

M860 processor: part number 5, mask 2

2 FastEthernet interfaces

1 Serial interface

32K bytes of NVRAM.

49152K bytes of processor board System flash (Read/Write)

 Configuration register is 0x2102

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Yes the card is good but you will need a voice IOS as ikalmar suggested,

these are named


something like c2600-ipvoice-mz.123-26.bin

will run on your router, for the latest versions you will need to upgrade the DRAM to 196Mb
alg205Author Commented:
Where can I buy this VOICE IOS?
You will need a support contract with Cisco to download it.

However I am told that if you search the internet you can find all sorts of things to download.
alg205Author Commented:
I am on cisco Site right now. I have Smart NET. I can find the router IOS but nothing that looks like its for voice.
Istvan KalmarHead of IT Security Division Commented:
it is an EOL device, you not able to buy from cisco....
If you have cco full acoount you able to directly download from cisco.com
Istvan KalmarHead of IT Security Division Commented:
Release Date: 12/Feb/2010
Size: 22908.29 KB  (23458088 bytes)
Minimum Memory: DRAM:96 MB  Flash:32 MB
Yes ikalmar's version is newer and still fits in your router, go for that
alg205Author Commented:
Ok thanks, just downloaded it. One more question then I will award you your points. I cannot find on the sh ver the amount of ram I have. I should say I do not know how to interpret the sh ver. So I need to know how much I have and if I need to add more. YUP I am a beginner Thanks
greg wardSystems EngineerCommented:
the fxo is for incoming calls only and the fxo does not support caller-id
for caller-id you need a vic2 2fxo (universal) or a vic 2fxo-m1 ( there are also an m2 and an m3 depending on location)
if you want to plug a normal house phone you would need a vic 2fxs or you could use a cisco phone like the 7940.
You will also need a dsp module.
Cisco 2621XM (MPC860P) processor (revision 0x100) with 127308K/3764K bytes of memory.

DRAM show in this line 128Mb

Oh and good points by deepdraw, its easy to forget that you need a DSP (tend to take it for granted) and the facilities you get from the PSTN via an FXO will depend on the exact model, where you are in the world and what your service provider offers.
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