Cisco 1720 Datasheet page 7

Hardware/Software Options
Comprehensive WAN Support
The Cisco 1721 and 1720 support up to two of the WICs listed in Table 3. These WICs support a wide variety of
WAN technologies: Integrated Services Digital Network (ISDN), asynchronous serial and synchronous serial such as
leased lines, Frame Relay, ADSL, G.shdsl, Switched 56, X.25, and Switched Multimegabit Data Service (SMDS), and
single-port Ethernet. Also available are WICs that integrate a DSU/CSU into the Cisco 1721 and 1720, eliminating
the support costs and complexity of deploying and managing external devices.
Table 3
WAN Support for the Cisco 1721 and 1720
WIC
WIC-1T
WIC-2T
WIC-2A/S
WIC-1B-S/T
WIC-1B-U
WIC-1DSU-56K4
WIC-1DSU- T1
WIC-1ADSL
WIC-1ENET
WIC-1SHDSL
VWIC-1MFT-T1*
VWIC-2MFT-T1*
VWIC-2MFT-T1-DI*
VWIC-1MFT-E1*
VWIC-2MFT-E1*
VWIC-2MFT-E1-DI*
VWIC-1MFT-G703*
VWIC-2MFT-G703*
*Supported on Cisco 1721 model only, not supported on Cisco 1720 model
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Description
One-port serial, asynchronous and synchronous (T1/E1)
Two-port serial, asynchronous and synchronous (T1/E1)
Two-port low-speed serial (up to 128 kbps), asynchronous and synchronous
One-port ISDN Basic Rate Interface (BRI) S/T
One-port ISDN BRI U interface with integrated NT1
One-port integrated 56/64-kbps, four-wire DSU/CSU
One-port integrated T1/fractional T1 DSU/CSU
One-port ADSL interface
One-port 10BASE-T Ethernet interface
One-port G.shdsl interface
One-port RJ-48 multiflex trunk - T1
Two-port RJ-48 multiflex trunk - T1
Two-port RJ-48 multiflex trunk - T1 with drop and insert
One-port RJ-48 multiflex trunk - E1
Two-port RJ-48 multiflex trunk - E1
Two-port RJ-48 multiflex trunk - E1 with drop and insert
One-port RJ-48 multiflex trunk - E1 G.703
Two-port RJ-48 multiflex trunk - E1 G.703
Cisco Systems, Inc.
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