Specifications

Serial Interface Configuration Examples

IC-118

Cisco IOS Interface Configuration Guide

For more information, refer to the “Conﬁgure the T3 Controller” and “Conﬁgure External T1

Channels” sections earlier in this chapter. The following examples are included in this section:

• CT3IP Conﬁguration with Default Values Accepted Example

• CT3IP External Ports Conﬁguration Example

• CT3IP Maintenance Data Link (MDL) Example

• CT3IP Performance Monitoring Example

• CT3IP BERT Test Pattern Example

• CT3IP Remote FDL Loopback Example

CT3IP Conﬁguration with Default Values Accepted Example

In the following example, timeslots 1 through 24 (the entire T1 bandwidth) are assigned to T1

channel 16, and timeslots 1 through 5 and 20 through 23 (fractional T1 bandwidth) are assigned to

T1 channel 10 for the CT3IP in slot 9. The default framing, cable length, and clock source are

accepted for the T3, and the default speed, framing, clock source, and line code are accepted for each

T1 channel. Each T1 channel is assigned an IP address. Other interface conﬁguration commands can

be assigned to the T1 channel at this time.

controller t3 9/0/0

t1 16 timeslot 1-24

t1 10 timeslot 1-5,20-23

interface serial 9/0/0:16

ip address 10.20.20.1 255.255.255.0

interface serial 9/0/0:10

ip address 10.20.20.3 255.255.255.0

CT3IP External Ports Conﬁguration Example

In the following example, T1 channel 1 on the CT3IP in slot 9 is broken out as an external port so

that it can be further channelized on the MIP in slot 3. The cable length is 300 feet, and the default

line coding format on the T1 channel is used. Because the default line coding format on the T1

channel is B8ZS and the default line coding on the MIP is AMI, the line coding on the MIP is

changed to B8ZS.

controller t3 9/0/0

t1 external 1 cablelength 300

controller t1 3/0

linecode b8zs

channel-group 1 timeslots 1

interface serial 3/0:1

ip address 10.20.20.5 255.255.255.0

CT3IP Maintenance Data Link (MDL) Example

The following examples show several of the Maintenance Data Link (MDL) messages for the CT3IP

in slot 9:

controller t3 9/0/0

mdl string eic Router C

mdl string lic Network A

mdl string fic Bldg 102

mdl string unit 123ABC