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The Cisco Third-generation 1-, 2-port and 4-port T1/E1 Multiflex Trunk Voice/WAN Interface (MFT VWIC3s) support data and voice applications on the Cisco 1921, 1941 and 1941W (data only), and the Cisco 2901, 2911, 2921, 2951, 3925, 3945, 3925E and 3945E Integrated Services Routers. The Cisco MFT VWIC3 combines WAN-interface-card (WIC) and voice-interface-card (VIC) functions to provide unparalleled flexibility, versatility, and investment protection through its many uses. Customers who choose to integrate data and voice in multiple steps preserve their investment in a T1/E1 WAN interface because the Cisco MFT VWIC3 cards can be reused in packet voice applications. The 2 port T1/E1 MFT VWIC3 is shown below.The Cisco MFT VWIC3 interface cards add improvements over the Cisco Second-generation 1- and 2-port T1/E1 Multiflex Voice/WAN Interface Cards (MFT VWIC2s). The Cisco 2- and 4-port MFT VWIC3s enable each port to be clocked from an independent clock source for data applications. Voice applications can now be clocked independently from data applications, with all ports for voice applications clocked from a single source. The Cisco MFT VWIC3s use the ECAN on the motherboard PVDM cards with up to 128ms echo-tail length for demanding network conditions. MFT VWIC3 cards support up to 2 channel groups per T1/E1 port for serial data applications. Refer to Table 3 for all configuration options offered with the MFT VWIC3 cards.
| VWIC3-4MFT-T1/E1 | |
| Manufacturer | Cisco |
| Part Number | VWIC3-4MFT-T1/E1 |
| Device Type | Interface module |
| Form factor | 4-Port T1/E1 Multiflex Trunk Voice/WAN Interface Card |
| Specifications | |
| Number of Ports | 4 |
| T1 Support | Yes |
| E1 Support | Yes |
| Unstructured E1 (G.703) Support | No |
| Data Support WIC Mode | Yes |
| Voice Support VIC* | Yes |
| Drop-and-Insert Multiplexing | Yes |
| Configuration Comparison | |
| Serial Data (channel-group*) | 4 total |
| 1 per port | |
| Voice CAS (ds0-group**) | 96 total (T1) |
| 124 total (E1) | |
| 1 per timeslot | |
| PRI (pri-group***) | 4 total |
| 1 per port | |
| Drop & Insert (tdm-group****) | 96 total (T1) |
| 124 total (E1) | |
| 1 per timeslot | |
| Network Management Features | |
| Telnet or Console | Remote and local configuration, monitoring, and troubleshooting from Cisco IOS Software CLI |
| Simple Network Management Protocol (SNMP) | • Router and DSU/CSU managed by single SNMP agent; router, DSU, and CSU appear as a single network entity to user |
| • Standard MIB (MIB II) | |
| • Cisco Integrated DSU/CSU MIB | |
| • RFC 1406 T1 MIB, Including Alarm Detection and Reporting | |
| SNMP Traps | Generated in response to alarms |
