3Com S24x, S27x, S26x installation manual E1 Port Record, Parameters Port Type, Line Coding

		Configuring Channelized Data
E1 Port Parameters
Introduction
	This section describes the E1 port parameters in detail. The E1 Port Record contains
	parameter values that you use to define operating characteristics for an E1 dual port
	digital interface card.
Configuration
	Configure an E1 port before configuring a Virtual Port Mapping Record, which maps
Guidelines	a logical timeslot channel (a virtual port) to that port.
E1 Port Record
	The following parameters are available from the E1 port record.
Parameters
	Port Type
	Range:	Voice, T1, E1
	Default:	Null
	Description:	Specifies the type of port that you are configuring; the parameter
		value you input for port type determines the parameters that
		appear next.
	Boot Type:	Changes to this parameter require a Node boot to take effect.
	Line Framing Type
	Range:	E1_CAS, E1_CAS_CRC, E1_CAS_FEBE
	Default:	E1_CAS
	Description:	Indicates type of framing the E1circuit uses.
		• E1_CAS: Channel Associated Signaling (CAS)
		• E1_CAS_CRC: Channel Associated Signaling with CRC
		• E1_CAS_FEBE: Channel Associated Signaling with Si = Far
		End Bit Error functionality that sends an indication in TS0
		that signifies receipt of a SuperFrame with a bad CRC
	Line Coding
	Range:	AMI, HDB3
	Default:	HDB3
	Description:	Selects zero suppression technique used on this E1 link.
		• AMI: Alternate Mark Inversion (for testing only)
		• HDB3: High Density Bipolar 3

Channelized Data 5-13