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Cisco Media Gateway Controller Software Release 9 Billing Interface Guide
OL-1089-11
Chapter 1 Billing Interfaces
CDE Detail Description
Forward Call Indicators Sent (Tag: 2010/ANSI)
Table 1-33 Forward Call Indicators Sent Description Form
Name: Forward Call Indicators Sent Tag: 2010 Source: MDL
Description/Purpose: This is for the sent Forward Call Indicator parameter in ISUP message. It includes the following
fields: International Call Ind.; End To End Method Ind.; Interworking Ind.; IAM Segmentation Ind.; ISDN User Part
Ind.; ISDN User Part Preference Ind.; ISDN Access Ind.; and SCCP Method Ind.
Format: ANSI T1.113 Length in Octets: 2
Data Value: National/International call indicator Bit A—For POTS calling, Bit A should be coded as a 0, signifying
that this is an incoming national call. A coding of 1 signifies that the call is an incoming international call.
End-to-end method indicator Bits CB
00 No end to end method available.
01 Pass along method available.
10 SCCP method available.
11Both Pass along and SCCP methods available.
Interworking indicator Bit D—This field indicates to the Cisco MGC if any interworking has been encountered in the
type of signaling for this call. No pertinent information needs to be acted upon by the Cisco MGC; it should just pass
the information to the destination. “0” means no interworking encountered (SS7 all the way). “1” means interworking
was encountered.
IAM Segmentation indicator Bit E—In POTS calling, this segmentation indicator is marked with a 0.
ISDN User Part indicator Bit F, HG, I—This is a more granular field for use by the ISUP. In the United States, the ISUP
is used exclusively. For POTS national numbers, this field is marked 1 for ISUP used all the way. That is, if the
Interworking indicator is set at 0, there was no interworking. If the incoming call has a 0 in this field, there was
interworking or the incoming international call could have used TUP for signaling before reaching the national
network. The Cisco MGC should not have to deal with this bit; it passes it on to the destination. For more details, please
refer to the ANSI T1.113 specification.
Extended Data Value:
General Information:
MGC Release: Release 5.0 and later.