AltiGen comm ACM 5.1 manual Setting the Configurable Options

Chapter 11: Board Configuration

Error	Meaning
Line Code Errors	Line Code Error is defined as an occurrence of a bi-polar
	variation or excessive zeroes.
Bit Errors	Bit Errors are defined as a CRC-6 error in ESF, FT-bit
	error in SLC-96 and F-bit or sync bit error in SF.
Xmt Frame Slips	Transmit Frame Slips counter shows the number of
	frame slips for the transmitter
Clear button	Use the Clear button to reset the statistics counters.

Note: For ideally synchronized systems, Transmit and Receive Frame Slips counters should be ‘0.’ Continuous update of the frame slips counters means that transmit and receive frequencies are not equal. In this case, you should check the system and CT-Bus clock setup.

Setting the Configurable Options

These are the options you can set:

Option	Notes
Frame Type	• For T1, you can set the Frame Type to either SF or ESF.
	SF (Superframe Format) consists of 12 consecutive
	frames. ESF (Extended Superframe Format) consists of
	24 consecutive frames.
	• For E1, you can set the Frame Type to either No CRC or
	CRC4. CRC4 is embedded into 16 consecutive frames.
Line Code	• For T1, you can set the Line Code to either AMI or
	B8ZS. AMI (Alternate Mark Inversion) is the line coding
	format in T1 transmission systems whereby successive
	ones (marks) are alternately inverted and sent with
	opposite polarity of the preceding mark. B8ZS (Binary 8
	Zero Substitution) sends two violations of the bipolar line
	encoding technique, rather than inserting a one for every
	seven consecutive zeros.
	• For E1, you can set the Line Code to either AMI or
	HDB3. HDB3 (High Density Bipolar Order) is based on
	AMI, but extends this by inserting violation codes
	whenever there is a run of four or more zeros.
Zero Code Suppression	You can set the Zero Code Suppression to None (default
	setting), Jam Bit 8, GTE or Bell.
	Zero Code Suppression inserts a “one” bit to prevent the
	transmission of eight or more consecutive “zero” bits; Jam
	Bit 8 forces every bit 8 to a one; GTE Zero Code
	Suppression replaces bit 8 of an all zero channel byte to a
	one, except in signaling frames where bit 7 is forced to a
	one. Bell Zero Code Suppression replaces bit 7 of an all zero
	channel byte with a one.
CD Bits Handling	CD Bits Handling is not editable.

132AltiWare ACM 5.1 Administration Manual