cisco VWIC2-1MFT-G703产品介绍

cisco VWIC2-1MFT-G703 Introduction

This document provides a sample configuration for the second-generation 1- and 2-port T1/E1 multiflex trunk (MFT) voice/WAN interface cards (multiflex VWICs), which support data and  cisco VWIC2-1MFT-G703思科原装线卡模块 voice applications in Cisco multiservice routers. The multiflex VWIC combines WAN interface card (WIC) and voice interface card (VIC) functionality to provide the following improvements:

• Support for both T1 and E1--T1/E1 MFT VWIC2 cards provide additional flexibility in cisco VWIC2-1MFT-G703思科原装线卡模块 configuring the MFT VWIC2 cards by supporting T1, fractional T1, E1, and fractional E1 for both voice and WAN applications.
• Drop and insert capability on all versions--All MFT VWIC2 modules now include the drop and insert multiplexing capability, which eliminates external third party CSU/DSUs and drop and insert multiplexers.
• Enhanced clocking capabilities--The 2-port MFT VWIC2s can enable each port to be clocked from independent clock sources for data applications.cisco VWIC2-1MFT-G703思科原装线卡模块 This independent clocking capability is not supported for voice applications and not supported with the AIM-ATM-VOICE-30 module.
• Dedicated echo cancellation cisco VWIC2-1MFT-G703思科原装线卡模块 option--MFT VWIC2s have an onboard slot for a multiflex trunk dedicated echo cancellation module (EC-MFT-32 and EC-MFT-64), offering an enhanced echo cancellation capability for demanding network conditions.

Prerequisites

Requirements

Before attempting this configuration, please ensure that you meet the following prerequisites:

• cisco VWIC2-1MFT-G703思科原装线卡模块Cisco IOS Image -- To run these features on T1/E1 interfaces, you must install an IP Plus or IP Voice image (minimum) of Cisco IOS Release 12.3(14)T or a later release.
• VWIC Support -- The multiflex VWIC cards are supported on Cisco 2600XM series, Cisco 2691, Cisco 2800 series, Cisco 3700 series. The multiflex VWIC cards can also be installed in any VIC slot on the router.
• Independent Clocking Mode -- The independent clocking mode is supported only on these modules:
  • VWIC2-1MFT-G703
  • VWIC2-2MFT-G703
  • VWIC2-2MFT-T1/E1
  • VWIC2-1MFT-T1/E1

To enable independent clocking mode, use the keyword independent in the clock source command. The  independent keyword expands on the clock source internal and clock source line commands to specify that the port can operate on an independent clocking domain. Prior to the addition of the  independentkeyword, port 0 was the default primary clock source, and port 1 was the default secondary clock source and is loop-timed. With independent clocking enabled, this dependency no longer exists, so the  independent keyword means that both ports can be independently clocked.

When independent clocking is configured, the controller will support only one channel group and no voice applications. If more than one channel group is configured, the following error cisco VWIC2-1MFT-G703思科原装线卡模块 message occurs:

channel-group 2 timeslots 3
%Channel-group already created.
%Only 1 channel-group can be configured with independent clocking.
%Insufficient resources to create channel group

When you are configuring the clock source independent and no clock source independent commands, the channel group has to be removed from the configuration.

Components Used

The information in this document is based on combinations of the network modules supported by the second-generation 1- and 2-port T1/E1 multiflex trunk voice/WAN interface cards. If your network module is:cisco VWIC2-1MFT-G703思科原装线卡模块

• NM-HDV (for VWIC option, choose 0 or 1), these cards can be used:
  • VWIC2-1MFT-T1/E1
  • VWIC2-2MFT-T1/E1
  • VWIC2-2MFT-G703
• NM-HDV2 (for VWIC option, choose 0 or 1), these cards can be used:
  • VWIC2-1MFT-T1/E1
  • VWIC2-2MFT-T1/E1
  • VWIC2-1MFT-G703
  • VWIC2-2MFT-G703
• NM-HD-2VE (for VWIC option, choose 0, 1, or 2), these cards can be used:
  • VWIC2-1MFT-T1/E1
  • VWIC2-2MFT-T1/E1
• NM-2W, NM-1FE1R2W, NM-1FE2W-V2, NM-2FE2W-V2 (for VWIC option, choose 0, 1, or 2), these cards can be used:
  • VWIC2-1MFT-T1/E1
  • VWIC2-2MFT-T1/E1
  • VWIC2-1MFT-G703
  • VWIC2-2MFT-G703

Note: For this feature to work properly, the network modules listed here must be installed in one of the following platforms: Cisco 2600XM, Cisco 2691, Cisco 2800 series, Cisco 3662 (telco models), Cisco 3700 series, and Cisco 3800 series.

Background Information

Key Featurescisco VWIC2-1MFT-G703思科原装线卡模块

The second-generation 1- and 2-port T1/E1 multiflex trunk voice/WAN interface cards have the following key features:

• Full support for T1 Facility Data Link (FDL)
• Controller local loopbacks
• Controller remote loopbacks
• RFC 1406 and integrated CSU/DSU MIB
• MIB and Simple Network Management Protocol (SNMP) management
• Firmware to support T1 and E1 Layer 1 homologation
• User-initiated VWIC reset and field-programmable gate array (FPGA) download
• Voice support (includes DS0-group and PRI-group configuration)

The following list shows the names and descriptions of the modules with second-generation 1- and 2-port T1/E1 multiflex trunk voice/WAN interface cards.cisco VWIC2-1MFT-G703思科原装线卡模块

• VWIC2-1MFT-T1/E1-- 1-port RJ-48 multiflex voice/WAN trunk (T1/E1)
• VWIC2-2MFT-T1/E1--2-port RJ-48 multiflex voice/WAN trunk (T1/E1)
• VWIC2-1MFT-G703-- 1-port RJ-48 multiflex trunk (E1 G.703)
• VWIC2-2MFT-G703-- 2-port RJ-48 multiflex trunk (E1 G.703)

Note: Although unstructured G.703 operation is particular to E1 operation, the VWIC2-1/2MFT-G703 cards also support structured T1 operation.

Integrated Drop and Insert Capability

The drop and insert feature enables the removal of DS0 time slots from one E1 interface and insertion into time slots of the other E1 interface. This feature is available in VWIC applications. If you configure drop and insert, be sure that the E1 framing under the controllers involved (the tdm-groups configuration location) is the same. If you use different frame types, the signaling bits may not be read properly. This failure occurs during the drop of a channel from one controller and insertion into a channel from another controller. Drop and insert time slots do not need to be contiguous.cisco VWIC2-1MFT-G703思科原装线卡模块

Configure

In this section, you are presented with the information to configure the features described in this document.

Network Diagram

This document uses the network setup shown in the diagram below.