CIC Mapping

CIC mapping is assigning Circuit Identification Codes to specific spans and chans. The concept of Channel Numbering is intimately related.

Here is a possible CIC map for a 2 E1 system:

  1. CIC 1-15 and 17-31 are assigned to wanpipe1 (sangoma card at slot x bus y port 1 ) chans 1-15 and 17-31 (chan 16 is the ss7 signaling channel, so CIC 16 is unused by ISUP in this case)
  2. CIC 33-63 are assigned to wanpipe 2 (sangoma card at slot x bus y port 2) chans 1-31 (very often, CIC 32 is not specified since it corresponds to slot 0 on the E1 which cannot be used for voice or signalling)

This mapping comes from information supplied by the telco. They may provide an identifer for each E1 loop and the CICs assigned to each loop. We must then ensure that the:
  • telco E1 loop with CICs 1-15, 17-31 is plugged in to the wanpipe1 port
  • telco E1 loop with CICs 33-63 is plugged in to the wanpipe2 port

It is possible that the telco could specify the same CIC map as follows:
E1-1 CIC 00..31
E1-2 CIC 32..63

SS7 link T/S 16 on E1-1

In this case we modify the range to omit E1 sync channel 0 as follows:
E1-1 CIC 01..31
E1-2 CIC 33..63

Then we omit the SS7 channel as follows:
E1-1 CIC 01..15, 17..31
E1-2 CIC 33..63

The ss7boost.conf [TRUNK] section reflects this configuration.

Created by: mike last modification: Wednesday 16 of May, 2007 [19:43:16 UTC] by mike

The original document is available at http://www.ss7box.com/tiki-index.php?page=CIC%20Mapping