ve assigned all 24 DSOs (referenced as timeslots) to each channel group. Configuring DS3s However, because this is a channelized DS3, I could separate each T1 further by group- ing DSOs together. Each group would get its own channel group number. Here's the controller configuration: controller T3 2/0 framing m23 clock source line t1 1 channel-group 1 timeslots 1-24 t1 2 channel-group 1 timeslots 1-24 t1 3 channel-group 1 timeslots 1-24 t1 4 channel-group 1 timeslots 1-24 t1 5 channel-group 1 timeslots 1-24 t1 6 channel-group 1 timeslots 1-24 t1 7 channel-group 1 timeslots 1-24 t1 8 channel-group 1 timeslots 1-24 t1 9 channel-group 1 timeslots 1-24 t1 10 channel-group 1 timeslots 1-24 t1 1 clock source Line t1 2 clock source Line t1 4 clock source Line t1 6 clock source Line t1 7 clock source Line t1 8 clock source Line t1 9 clock source Line t1 10 clock source Line t1 11 clock source Line t1 12 clock source Line t1 13 clock source Line t1 14 clock source Line t1 15 clock source Line t1 16 clock source Line t1 17 clock source Line t1 18 clock source Line t1 19 clock source Line t1 20 clock source Line t1 21 clock source Line t1 22 clock source Line t1 23 clock source Line t1 24 clock source Line t1 25 clock source Line t1 26 clock source Line t1 27 clock source Line t1 28 clock source Line Here, we have a DS3 connected to interface 2/0. This is a channelized DS3, SO the framing is set to M23. The clock source defaults to Line. Unlike with Tls, this should normally be left alone, as clocking is usually provided from the SONET network up- stream. Notice that there is a clock statement for the DS3 and additional clock state- ments for each T1 within the DS3. Chapter 22: DS3 Cisco supports only M23 and C-bit framing for channelized DS3s. When using M13 on telecom equipment, use M23 on your Cisco gear. Once you have configured the controllers, you can configure the serial T1s as if they were regular T1s. The serial interfaces are a combination of the physical interfaces and the T1 numbers in the DS3, followed by a colo