Техническая Спецификация для Cisco 1-Port ISDN BRI NT-1 WAN Interface Card for 1700/2600/3600/3700 Series Routers WIC-1B-U-V2=
Модели
WIC-1B-U-V2=
© 2005 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com.
Page 5 of 11
configuration of this TDM switching is flexible so that DS-0 channels on the “PBX port” do not have to be mapped to DS-0 channels with the same
time slots on the central-office port. The remaining 14 DS-0 channels on the MFT VWIC2 central-office port terminate through the backplane
connector of the VWIC2 on the router as a single aggregate channel group. The 14 DS-0 channels are not individually addressable by the router as a
channelized service, but can be split into two or more channel groups.
The drop-and-insert function is included in all the Cisco MFT VWIC2 interface cards. The term “drop and insert” is normally used when router data
(or data from another data device) is multiplexed with voice calls. A more generic term for “drop and insert” is “digital cross-connect.” On Cisco
2600/3700 access routers, Digital cross-connecting of voice channels is only supported by the Cisco MFT VWIC2 when inserted into the Digital
T1/E1 Packet Voice Trunk Network Module (NM-HDV), 2 slot IP Communications Enhanced Voice/Fax Network Modules (NM-HD-2VE) or IP
Communications High-Density Digital Voice/Fax Network Modules (NM-HDV2), IP Communications High-Density Digital Voice NM with 1
T1/E1 (part number NM-HDV2-1T1/E1), and IP Communications High-Density Digital Voice NM with 2 T1/E1 (part number NM-HDV2-2T1/E1).
For example, a single T1 connection from a PBX to the PBX port on the MFT VWIC2 can be divided between DS-0 channels that go to the Digital
T1/E1 Packet Voice Trunk Network Module (NM-HDV) for packetized voice (for example, VoIP) and DS-0 channels that are TDM switched to the
central-office port of the MFT VWIC2 for standard circuit-switched voice connectivity. On Cisco 2800/3800 integrated services routers, digital
cross-connecting of channels is supported by the Cisco MFT VWIC2 when inserted into an HWIC slot or any of the network modules listed above.
Analog Cross Connect Solution
The time-division multiplexing (TDM) DS0 channels can be cross-connected with analog voice ports to create an analog cross connect solution.
This capability is supported on the 1760, 2800 and 3800 series routers. It can also be supported the supported 26, 37 and 3700 access routers when
both ports are on the same network module (NM-HD-2VE, NM-HDV2, NM-HDV2-1T1/E1, NM-HDV2-2T1/E1).
Table 1.
Cisco MFT VWIC2 Platform Support and Minimum Cisco IOS Software Release Requirements
VWIC2-1MFT-T1/E1)
VWIC2-2MFT-T1/E1)
VWIC2-1MFT-G703)
VWIC2-2MFT-G703)
Cisco 1721,1751 and 1760 WIC/VWIC Slots
12.3(14)T
12.3(14)T
12.3(14)T
12.3(14)T
Cisco 1751 and 1760 VIC Slot****
12.3(14)T
12.3(14)T
12.3(14)T
12.3(14)T
Cisco 2600 Chassis WIC Slots
No
No
No
No
Cisco 2600 with Voice-Capable or
Data-Only
Network Modules
No
No
No
No
Cisco 2600XM Chassis WIC Slots
12.3(14)T***
12.3(14)T***
12.3(14)T***
12.3(14)T***
Cisco 2600XM with Voice-Capable or
Data-
Only Network Modules
12.3(14)T
12.3(14)T
12.3(14)T*
12.3(14)T**
Cisco 2691 Chassis WIC Slots
12.3(14)T***
12.3(14)T***
12.3(14)T***
12.3(14)T***
Cisco 2691 with Voice-Capable or
Data-Only
Network Modules
12.3(14)T
12.3(14)T
12.3(14)T*
12.3(14)T**
Cisco 3620, 3640A, and 3660 Chassis WIC
Slots
No
No
No
No
Cisco 3620, 3640A, and 3660 with
Voice-
Capable or Data-Only Network Modules
No
No
No
No