User guide

Release Notes for Cisco IOS Release 12.4T

OL-8012-09 Rev. B0

Platform-Specific Information

• WIC-1B-S/T-V3: one-port ISDN WIC (dial and leased line)

• WIC-1B-U-V2: one-port ISDN BRI NT-1 WIC for the Cisco 1700, 2600, 3600, and 3700 series

• WIC-1DSU-56K4: one-port integrated 56/64-kbps 4-wire DSU/CSU

• WIC-1DSU-T1: one-port integrated T1/fractional T1 DSU/CSU

• WIC-1DSU-T1-V2: updated one-port T1/fractional T1 DSU/CSU WIC

• WIC-1ENET: one-port 10BASE-T Ethernet

• WIC-1SHDSL: one-port G.SHDSL

• WIC-1SHDSL-V2

• WIC-1AM: one-port analog modem

• WIC-2AM: two-port analog modem

• WIC-4ESW: four-port Ethernet switch WIC

The following T1/E1 Multiflex VWICs are also supported on the Cisco 1721 for data applications only:

• VWIC-1MFT-E1: one-port RJ-48 multiflex trunk (E1)

• VWIC-2MFT-E1: two-port RJ-48 multiflex trunk (E1)

• VWIC-1MFT-G703: one-port RJ-48 multiflex trunk (G.703)

• VWIC-2MFT-G703: two-port RJ-48 multiflex trunk (G.703)

• VWIC-1MFT-T1: one-port RJ-48 multiflex trunk (T1)

• VWIC2-1MFT-T1/E1

• VWIC2-2MFT-T1/E1

• VWIC2-1MFT-G703

• VWIC2-2MFT-G703

• VWIC-2MFT-T1: two-port RJ-48 multiflex trunk (T1)

• VWIC-2MFT-E1-DI: two-port RJ-48 multiflex trunk (E1) (with drop and insert)

• VWIC-2MFT-T1-DI: two-port RJ-48 multiflex trunk (T1) (with drop and insert)

Cisco 1751

The voice- and data-capable Cisco 1751 router comes in two models, the Cisco 1751 and the

Cisco 1751-V. These models provide global Internet and company intranet access, and include the

following features:

• VoIP voice-and-data functionality; the router can carry voice traffic (for example, telephone calls

and faxes) over an IP network

• Support for Cisco IOS Firewall, Intrusion Detection Systems, IPSec Virtual Private Networks

• Modular architecture

• Network device integration

The Cisco 1751 router has the following hardware components:

• One autosensing 10/100 Fast Ethernet port, which operates in full- or half-duplex mode (with

manual override available)

• One voice-only interface card slot—supports a single voice interface card with two ports per card

• Two WAN/VIC slots for either WICs or VICs