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New Member

Install NM-1A-E3 in 3800 ISR

Hi Everybody,

My customer has installed a 3825 ISR with this characteristics:

ROM: System Bootstrap, Version 12.3(11r)T2, RELEASE SOFTWARE (fc1)

System image file is "flash:c3825-adventerprisek9-mz.124-4.T4.bin"

Cisco 3825 (revision 1.0) with 222208K/39936K bytes of memory.

Processor board ID FTX0949A01V

2 Gigabit Ethernet interfaces

4 Serial(sync/async) interfaces

1 ATM interface

1 Channelized E1/PRI port

1 Virtual Private Network (VPN) Module

4 Voice FXS interfaces

DRAM configuration is 64 bits wide with parity enabled.

479K bytes of NVRAM.

62720K bytes of ATA System CompactFlash (Read/Write)

As you can see it has 1 NM-1A-E3 and they want to install new one in the other slot available but we are not sure if that is possible. i mean, a router 3825 ISR can support 2 NM-1A-E3?

We checked datasheet but the info is no really clear.

Hall of Fame Super Gold

Re: Install NM-1A-E3 in 3800 ISR

Should be possible, of course being an access router depending on features enabled the CPU may be stressed a bit, better would be to use two independent routers, or one bigger 3845.

Hope this helps, please rate all useful posts!

New Member

Re: Install NM-1A-E3 in 3800 ISR

thank a lot for your help about E3 ATM card in ISR 3825. indeed i checked the datasheet that is mentioned by other engineer here, but it doesnt result so helpful. my idea was confirm the info i got from a few sites here in cisco.

i send you an answer about your ISDN's question here in venezuela. i hope it help you.



Cisco Employee

Re: Install NM-1A-E3 in 3800 ISR


Only one module is recommended to use in a 3825 router chassis.Please see the link below:

HTH,Please rate if it does.

-amit singh

Hall of Fame Super Gold

Re: Install NM-1A-E3 in 3800 ISR

Thanks Amit. It is a little bit of a peculiar datasheet as it doesn't mention a "supported" maximum number, rather just a "recommended" number. And I agree with this recommendation.

Anyway, the online configuration tool allows two modules in a 3725.