Drop & Insert and tdm-group

My environment: Cisco 2821 router

IOS version: c2800nm-adventerprisek9-mz.124-24.T.bin

VWIC card: VWIC2-2MFT-T1/E1

Drop & Insert (D & I)

• Circuit switching
• DSP NOT used
• Cross-connecting TDM circuits from one port to another port
• Individual 64kbps DS0 channel can be transparently passed. uncompressed between T1/E1 ports without DSP processing
• Simply provides a TDM backplane and connect 2 controllers together
• Need to use the SAME framing type on both controllers

Example:

BB3#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

BB3(config)#controller e1 0/0/0

BB3(config-controller)#framing crc4

BB3(config-controller)#linecode hdb3

BB3(config-controller)#tdm-group 1 timeslots 1-8 type e&m

BB3(config)#controller e1 0/0/1

BB3(config-controller)#framing crc4

BB3(config-controller)#linecode hdb3

BB3(config-controller)#tdm-group 2 timeslots 1-8 type e&m

BB3(config)#connect d_and_i e1 0/0/0 1 e1 0/0/1 2