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3640 Router is not recognizing VoIP modules

Is there any reason that a 3640 router does not recognize the VoIP modules I have slotted? They are currently running 12.2 IOS. I have checked to make sure that the router's functioning correctly. I don't think that all three of the modules would go bad at the same time. Is there a specific command or way to enable the router to see these modules? Thanks in advance for any help.


Re: 3640 Router is not recognizing VoIP modules

Give a show version and paste the output, when u respond back.

What voice modules are you using. Mostly the IOS that you have is not supporting voice. You ll mostly need to upgrade to a voice supporting IOS train.

New Member

Re: 3640 Router is not recognizing VoIP modules

The full IOS number is 12.2(15)T2 and I am trying to use VIC 2FXS and a VIC 2FXO module. I've tried looking through Cisco's product information and they should be compatible. It is still showing that I have 4 Ethernet modules though. The lights are staying amber after power on. Is there a way to test the modules? Show ver is as follows:

Image text-base: 0x60008950, data-base: 0x60E4E000

ROM: System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE SOFTWARE (f


VoiceLabCore uptime is 20 hours, 25 minutes

System returned to ROM by power-on

System image file is "flash:c3640-ix-mz.122-15.T2.bin"

cisco 3640 (R4700) processor (revision 0x00) with 60416K/5120K bytes of memory.

Processor board ID 21943310

R4700 CPU at 100Mhz, Implementation 33, Rev 1.0

Bridging software.

X.25 software, Version 3.0.0.

4 Ethernet/IEEE 802.3 interface(s)

DRAM configuration is 64 bits wide with parity disabled.

125K bytes of non-volatile configuration memory.

24576K bytes of processor board System flash (Read/Write)


Re: 3640 Router is not recognizing VoIP modules

Your IOS is "c3640-ix-mz" which is IP/H323 feature set. You need a "Plus" version of IOS to support the VICs.

I have IP Plus on 2620 routers, with FXO ports; the routers are configured as H.323 gateways.

Hope this helps.


Re: 3640 Router is not recognizing VoIP modules

Also confirm that you have the voice cards (i.e. the FXS and FXO) installed on a good voice module. The cards will have to be installed on a voice module like NM-2V or NM-1V.

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