Alternate Odd - Even CIC Hunting Option

Below is information regarding the functionality of the Alternate Odd / Alternate Even hunting option when using software version 10.5.3 SP6 and above. In 10.5.3 SP6 new rules were added when employing the SS7 protocol for outgoing channel selection. The outgoing channel selection uses the value of the CIC number rather than the value of the channel number. Alternate Even will select the even numbered CICs and Alternate Odd will select the odd numbered CICs. There are however rules and limitations to the new functionality and they are described below.

 

Skip channel 16 and Skip CIC# on TS0 (Multi Span) in E1 protocol

The E1 protocol configuration in the SS7 channel group has the following additional parameters:

The tables below display the scenarios that could occur for the settings of the parameters above

 

Skip Channel 16 = False

Start Interface Offset: 0

Start Channel: 10

End Interface Offset: 0

End Channel: 18

Start CIC: 800

Skip Channel 16: False

 

The SS7 channels and assigned CICs in the channel group are:

Interface Offset Channel CIC Number
0 10 800
0 11 801
0 12 802
0 13 803
0 14 804
0 15 805
0 16 806
0 17 807
0 18 808

 

 

Skip Channel 16 = True,  Non-Contiguous CIC numbering = False

Start Interface Offset: 0

Start Channel: 10

End Interface Offset: 0

End Channel: 18

Start CIC: 800

Skip Channel 16: TRUE

Non-Contiguous CIC numbering: FALSE

 

The SS7 channels and assigned CICs in the channel group are:

Interface Offset Channel CIC Number
0 10 800
0 11 801
0 12 802
0 13 803
0 14 804
0 15 805
0 17 806
0 18 807

 

 

Skip Channel 16 = True,  Non-Contiguous CIC numbering = True

Start Interface Offset: 0

Start Channel: 10

End Interface Offset: 0

End Channel: 18

Start CIC: 800

Skip Channel 16: TRUE

Non-Contiguous CIC numbering: TRUE

 

The SS7 channels and assigned CICs in the channel group are:

Interface Offset Channel CIC Number
0 10 800
0 11 801
0 12 802
0 13 803
0 14 804
0 15 805
0 17 807
0 18 808

 

 

SKIP CIC # on TS0 (Multi Span): FALSE

Start Interface Offset: 0

Start Channel: 29

End Interface Offset: 1

End Channel: 3

Start CIC: 800

SKIP CIC # on TS0 (Multi Span): FALSE

The SS7 channels and assigned CICs in the channel group are:

Interface Offset Channel CIC Number
0 29 800
0 30 801
0 31 802
1 1 803
1 2 804
1 3 805

 

 

SKIP CIC # on TS0 (Multi Span): TRUE

Start Interface Offset: 0

Start Channel: 29

End Interface Offset: 1

End Channel: 3

Start CIC: 800

SKIP CIC # on TS0 (Multi Span): TRUE

The SS7 channels and assigned CICs in the channel group are:

Interface Offset Channel CIC Number
0 29 800
0 30 801
0 31 802
1 1 804
1 2 805
1 3 806

 

 

Skip Channel 16 = False, SS7 Links on Span 0 Channel 12 and Span 0 Channel 15

The SS7 Link also affects the assignment of the CIC numbers to the channels in the SS7 Channel group. Below is example of how the SS7 links would affect the assignments. If the SS7 Link is in the range of channels in the SS7 CIC group then the channel is not assigned a CIC number. The information below holds true for all other scenarios above.

SS7 Link 0 = Interface Offset 0, Channel 12

SS7 Link 0 = Interface Offset 0, Channel 15

Start Interface Offset: 0

Start Channel: 10

End Interface Offset: 0

End Channel: 18

Start CIC: 800

Skip Channel 16: FALSE

 

The SS7 channels and assigned CICs in the channel group are:

Interface Offset Channel CIC Number
0 10 800
0 11 801
0 12 = SS7 Link  
0 13 802
0 14 803
0 15 = SS7 Link  
0 16 804
0 17 805
0 18 806

 

 

Additional Information