The E-1 configuration is similar to the T-1 configuration but has a few different parameters:
Framing The E-1 framing types available are crc4 and no-crc4, with australia as an
option. The default is crc4, and it specifies CRC error checking, with no-crc4 specifying
that CRC checking is (surprise!) disabled. The australia framing method is used when configuring
an E-1 in (another surprise!) Australia.
Linecode This is either AMI or HDB3 when configuring an E-1, with HDB3 as the default.
In the following example, we specified slot 0, port 1 on our MIP card, using the crc4 framing
type. The provider has defined HDB3 as the linecode (HDB3 is the default) to match the carrier’s
equipment. For an E-1 PRI circuit, the D channel is 15 so the command pri-group time-slots
1-16 will specify that channels 1 through 15 will be controlled by the D channel (subchannel 15).
Again, remember not to get confused with the channel group and time slot numbering; the channel
group numbers range from 0 to 30, whereas the time slot values range from 1 to 31. Also remember
that channel 15 on the E-1 and channel 23 on the T-1 are for the D channels. However, time
slots 17 to 30 are for a dedicated connection with up to 30 available if purchased:
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#controller E1 1/0
Router(config-if)#framing crc4
Router(config-if)#linecode hdb3
Router(config-if)#pri-group timeslots 1-16
Router(config-if)#channel-group 1 timeslots 17-30 speed 64
Router(config-if)#^Z
Router#
You then need to specify the IP address and encapsulation methods used, just as in the T-1
example:
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#interface serial1/0:15
Router(config-if)#encapsulation ppp
Router(config-if)#ip address 172.16.30.5 255.255.255.252
Router(config)#interface serial1/0:1
Router(config-if)#encapsulation hdlc
Router(config-if)#ip address 172.16.30.5 255.255.255.252
Router(config-if)#^Z
Router#