146 CHAPTER 10: CONFIGURING WAN INTERFACE
Display and Debug T1-F
Interface Perform the display command in all views to display the state of T1-F interface
and other related information.
Tabl e 163 Display and debug T1-F interface
CE3 Interface Both E3 and E1 belong to ITU-T digital carrier system and are used in most areas
outside the North America. The data transmission rate of E3 interface is
34.368Mbps, and the line coding/decoding is HDB3 (High-Density Bipolar 3).
CE3 interface has two operating modes:
■When working in E3 mode, the interface is equivalent to a fractional interface
of data bandwidth 34.368Mbps.
■When working in CE3 mode, the interface can multiplex/demultiplex 16
channels of E1 signals. E3-to-E1 multiplex is compliant with ITU-T G.751 and
G.742. Each E1 interface can be divided into 32 time slots numbered in the
range of 0 to 31. The time slots between 1 and 31 can be randomly bound into
N x 64Kbps logical channels (time slot 0 for transmitting frame synchronizing
signals cannot participate in binding operation). Therefore, CE3 interface can
be channelized into E1 channels of 64Kbps.
CE3 interface supports the link layer protocols PPP, HDLC, Frame Relay, LAPB and
X.25, and the network protocols such as IP and IPX.
Configure CE3 Interface CE3 interface configuration includes:
■Enter the view of the specified CE3 interface
■Set clock mode for the CE3 interface
■Set national bit for the CE3 interface
■Set the loopback mode of the CE3 interface
■Set E1 Frame format
■Set operating mode of CE3 interface
Depending on the networking requirements, you may need to configure the
parameters such as PPP, Frame Relay and IP address for the CE3 interface. For
details, refer to the involving chapters.
1Enter view of Specified Interface for Configuration
CE3 interface uses the controller command to enter its view.
Perform the following configuration in system view to enter the view of the
specified CE3 interface.
Operation Command
Display configuration and state of T1-F interface display ft1 [ serial
serial-number ]
Display the operating state of T1-F interface display serial
serial-number