are you sure all the ds0's on the e1 aren't already used up , it looks as if you are trying to use more ds0's than are available. Count how many timeslots are used already on this controller, 30 will be your max
Thanks for your reply, I'm sure the controller is not fully utilized, in fact i attached the sequence of my commands for reference, Controller 5/7 still empty, however controller 5/0 to 5/6 are already utilized but when I start to add channel group in 5/7 I got this message.
controller E1 5/7
controller E1 6/2
controller E1 6/3
Enter configuration commands, one per line. End with CNTL/Z.
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