• One ISDN BRI port (S/T interface, requires external NT−1)
• RJ−45 connector
• Supported on Cisco 1600, 1720, 2600, 3600 or 3700 series
• Cannot be used with Cisco 1603 or 1604 base units
• Does not support hot swap, however no hardware damage occurs if it is swapped while power is on
• Can go into slot "W0" or "W1" of the 1E2W, 2E2W, and 1E1R2W
• Supported in NM−1FE1R2W, NM−1FE2W, NM−2FE2W, NM−2W

• Provides one standards-based 100BaseTX Fast Ethernet network interface
  
• Operates in half- and full-duplex modes
  
• Provides additional layer 3 routed interfaces
  
• Includes LED indicators that provide status information
  

This module is a refurbished product and comes with a 90 day hardware warranty.

• Provides an integrated access point to select Cisco routers
  
• Extensive WLAN security capabilities
  
• Multiple VLAN support
  
• Includes LED indicators that provide status information
• 2 x AIR-ANT4941 2.4GHz Dipole Antennas included with HWIC
  

This module is a refurbished product and comes with a 90 day hardware warranty.

• Connects local calls to a central office or PBX
• Supports Centralized Automatic Message Accounting (CAMA) with software configuration
• Software-configurable for all regions

This module is a refurbished product and comes with a 90 day hardware warranty.

• Connects local calls to a central office or PBX
• Supports Centralized Automatic Message Accounting (CAMA) with software configuration
• Software-configurable for all regions

• Supports voice and data applications
  
• RJ−45 connector
• Supported on Cisco 2600, 2800, 3600, 3700, and 38000 series
• Supports unframed G.703 and can be configured as a standard E1 interface

This module is a refurbished product and comes with a 90 day hardware warranty.

• Interfaces support router management, dial backup, and access.
• includes a jack for handset sharing access to a PSTN line.
• Supported on Cisco 1700, 2600, 2600XM, 3600, and 3700
• 56 Kbps (V.90) can be achieved when the peer is a digital modem

This module is a refurbished product and comes with a 90 day hardware warranty.

• Provides data rates up to 128 Kbps synchronous or 115.2 Kbps asynchronous serial links
  
• Supported on the 1700, 2600 and 3600 Series routers
  
• Can support protocols such as PPP, Frame Relay and DTE/DCE
• Features dual smart serial interfaces

This module is a refurbished product and comes with a 90 day hardware warranty.

• One ISDN BRI port (S/T interface, requires external NT−1)
• RJ−45 connector
• Supported on Cisco 1700, 1800, 1900, 2600XM, 2800, 2900, 3700, 3800 and 3900 series routers
  
• Does not support hot swap, however no hardware damage occurs if it is swapped while power is on
• NM-1FE2W-V2, NM-2FE2W-V2, NM-1FE1R2W or NM-2W

• One ISDN BRI port (U interface, internal NT-1)
• RJ−45 connector
• Supported on Cisco 1700, 2600, 3600, 3700 series routers
  
• Does not support hot swap, however no hardware damage occurs if it is swapped while power is on
• Supported in NM-1FE1R2W, NM-1FE2W, NM-2FE2W, and NM-2W

• Provides one ADSL2/ADSL2+ wide area network interface
  
• Supports Dying Gasp function
• Supports IP quality of service (QoS)
• Has one RJ-11 ADSL interface

This module is a refurbished product and comes with a 90 day hardware warranty.