Cisco Cisco IOS Software Release 12.4(23)

NM-8A/S

8-port asynchronous/synchronous serial network module

Cisco 2811, Cisco 2821,
Cisco 2851

NM-16A/S

16-port asynchronous/synchronous serial network module

Cisco 2811, Cisco 2821,
Cisco 2851

NM-16A

16-port asynchronous serial network module

Cisco 2811, Cisco 2821,
Cisco 2851

NM-32A

32-port asynchronous serial network module

Cisco 2811, Cisco 2821,
Cisco 2851

NM-1CE1T1-PRI

1-port Channelized E1/T1/ISDN PRI network module

Cisco 2811, Cisco 2821,
Cisco 2851

NM-2CE1T1-PRI

2-port Channelized E1/T1/ISDN PRI network module

Cisco 2811, Cisco 2821,
Cisco 2851

NM-4B-S/T

4-port ISDN BRI network module (S/T interface)

Cisco 2811, Cisco 2821,
Cisco 2851

NM-4B-U

4-port ISDN BRI network module with integrated Network 
Termination 1 (NT1) (U interface)

Cisco 2811, Cisco 2821,
Cisco 2851

NM-8B-S/T

8-port ISDN BRI network module (S/T interface)

Cisco 2811, Cisco 2821,
Cisco 2851

NM-8B-U

8-port ISDN BRI network module with integrated NT1 (U in-
terface)

Cisco 2811, Cisco 2821,
Cisco 2851

NM-1A-T3

1-port DS-3 ATM network module

Cisco 2811, Cisco 2821,
Cisco 2851

NM-1A-E3

1-port E3 ATM network module

Cisco 2811, Cisco 2821,
Cisco 2851

NM-8AM-V2

8-port analog modem network module with V.92

Cisco 2811, Cisco 2821,
Cisco 2851

NM-16AM-V2

16-port analog modem network module with V.92

Cisco 2811, Cisco 2821,
Cisco 2851

NM-HD-1V

1-slot IP Communications voice and fax network module

Cisco 2811, Cisco 2821,
Cisco 2851

NM-HD-2V

2-slot IP Communications enhanced voice and fax network 
module

Cisco 2811, Cisco 2821,
Cisco 2851

NM-HD-2VE

2-slot IP Communications enhanced voice and fax network 
module

Cisco 2811, Cisco 2821,
Cisco 2851

NM-HDA-4FXS

High-density analog voice and fax network module with four 
FXS slots

Cisco 2811, Cisco 2821,
Cisco 2851