Cisco 1-port RJ-48 multiflex voice/WAN trunk (T1/E1) VWIC2-1MFT-T1/E1= Benutzerhandbuch

file:///C|/paws/65322/tdmfxwic.html

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

●     

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, and Cisco 3800 series routers when installed on the network modules 

 . 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 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.

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:

●     

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: 

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