[root@SJPBX-01 ~]#  dahdi_genconf
[root@SJPBX-01 ~]# dahdi_cfg -vvv
DAHDI Tools Version - 2.5.0.2

DAHDI Version: 2.5.0.2
Echo Canceller(s): HWEC
Configuration
======================


Channel map:

Channel 01: FXO Kewlstart (Default) (Echo Canceler: mg2) (Slaves: 01)
Channel 02: FXO Kewlstart (Default) (Echo Canceler: mg2) (Slaves: 02)
Channel 03: FXO Kewlstart (Default) (Echo Canceler: mg2) (Slaves: 03)
Channel 04: FXO Kewlstart (Default) (Echo Canceler: mg2) (Slaves: 04)

4 channels to configure.

Setting echocan for channel 1 to mg2
Setting echocan for channel 2 to mg2
Setting echocan for channel 3 to mg2
Setting echocan for channel 4 to mg2
[root@SJPBX-01 ~]# service dahdi restart
Unloading DAHDI hardware modules: done
Loading DAHDI hardware modules:
  wctdm:                                                   [  OK  ]

Running dahdi_cfg:                                         [  OK  ]