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.
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
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 |
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 |
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 |
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 |
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 |
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 |