Specifying Framing - Cisco 10000 Series Configuration Manual

Chapter 5 24-Port Channelized E1/T1 Line Card Configuration
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Specifying Framing

North American T1 facilities operate at a line speed of 1544 kbps. Framing conforms to either of 2
standards:
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European, Australian, and some Asian E1 facilities operate at a maximum line speed of 2048 kbps.
Framing conforms to the CCITT G.704 or G.732 specification, which defines sixteen 32-timeslot
multiframes. The initial timeslot (0) is used for framing.
Specifying E1 Framing
To specify framing for an E1 interface, use the following framing command:
[no] framing {crc4 [australia] | no crc4 [australia]}
Example:
Router# configure terminal
Enter configuration commands, one per line. End with CNTRL/Z.
Router(config)# controller e1 1/0/0
Router(config-controller)# framing crc4
Router(config-controller)#
Where crc4 is a checksum format used in framing timeslot 0 to provide error detection.
The default framing type is CRC4.
The no form of this command sets framing to the default value.
In Australia, you must also specify australia to obtain proper handling of the clock setting when AIS
(alarm indication signal) detection occurs.
Router(config)# controller e1 1/0/0
Router(config-controller)# framing crc4 australia
Router(config-controller)#
Specifying T1 Framing
To specify framing for a T1 interface, use the following framing command:
[no] framing {esf | sf }
Where:
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Example:
Router# configure terminal
Enter configuration commands, one per line. End with CNTRL/Z.
Router(config)# controller t1 1/0/0
Router(config-controller)# framing sf hdlc-idle 0x7E
Router(config-controller)#
OL-8834-04
att—Conforms with the requirements of the AT&T TR 54016-1989 specification to receive 16-bit
data-link code words between the line card and the remote device. Note that the 24-port 24-Port
Channelized E1/T1 line card will not generate remote performance statistics requests. It only
responds to received performance statistics requests.
D4 Superframe Format (SF)—The standard D4 SF consists of twelve 24-timeslot frames.
Extended Superframe Format (ESF)—The ESF consists of twenty-four 24-timeslot frames.
esf—Specifies the extended superframe format
sf—Specifies the superframe format
Cisco 10000 Series Router Line Card Configuaration Guide
Controller Configuration Commands
5-25