CIC and Channel Mapping Options

When the Channel Group being configured is SS7 and the Hunting Options field in the Channel group object is set to either Alternate Odd or Alternate Even, 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. How the CIC Numbers are linked to the channel numbers are configured in the Circuits object. The information below displays examples of how the CIC numbers are mapped to the channel numbers for the different rules or selections. 

Skip Channel 16 = False

In the E1 protocol, channel 16 is typically used as a signaling channel. The IMG 2020 can be configured to map the CICs to the channels by either skipping channel 16 so it can be used for signaling or NOT skip channel 16 and map the channel to a CIC number. The example below displays the mappings when the Skip Channel 16 is set to False. The Alternate Odd/Alternate Even functionality has been left out for ease of understanding.

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

When Skip Channel 16 is set to True, Channel 16 will be skipped when mapping the channel to the CIC number. Also, when Skip Channel 16 is set to true, this opens a second field labeled Non-Contiguous CIC numbering. The Non-Contiguous CIC numbering field can be set so when Channel 16 is skipped, the CIC numbering can either be skipped to map with the channel number or not skipped. The examples below display the mapping scenarios for both.

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

SKIP CIC # on TS0 (Multi Span): False

In the E1 protocol, Time Slot 0 is utilized for functionality such as frame synchronization and alarms. When configuring more than one DS-1 there would be a Time Slot 0 for each DS-1. When the IMG 2020 maps the CIC numbers to the DS-0s, the choice of whether to skip a CIC number for each Timeslot 0 or not skip a CIC number can be configured. The examples below display the scenarios that would occur when configuring this field.

SKIP CIC # on TS0 (Multi Span): True

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

Below is an example that encompasses some of the functionality above. The placement of the SS7 Link affects the assignment of the CIC number to each of the channels in the SS7 channel group. If the SS7 Link is in the range of channels in the SS7 CIC group then the channel is not assigned a CIC number. Below is example of how the SS7 links would affect the assignments. The information below holds true for all other scenarios above.

Additional Information

• When the hunting options in the channel group object is set to Alternate Odd, the IMG 2020 will select the outgoing channel by selecting the first available odd numbered CIC. The subsequent channels selected will all have an odd numbered value.

• When the hunting options in the channel group object is set to Alternate Even, the IMG 2020 will select the outgoing channel by selecting the first available even numbered CIC. The subsequent channels selected will all have an even numbered value.

• The CIC number mappings described above are supported in the SS7 channel group only and the hunting options field in the channel group object is set to Alternate Odd or Alternate Even.

• If the Signaling Type is set to a protocol of something other than SS7, then the Alternate Odd/Alternate Even choices will select either odd or even numbered channels.

• If all odd numbered CICs are currently in use, and Alternate odd is configured, the IMG 2020 will then select from the even numbered CICs.

• If all even numbered CICs are currently in use, and Alternate even is configured, the IMG 2020 will then select from the odd numbered CICs.

• If a channel has a link configured on it, the IMG 2020 will not assign a CIC number to it.

• Alternate Odd/Alternate Even CIC hunting is not supported in JTISUP.