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Enabling the R2 Protocol
November 2009 351
Table 22 identifies the enumeration of Group B called line
conditions. This enumeration forms the set of indices to array
groupB_LineConditions (Table 19). This allows the mapping of the
invariant enumeration values to and from the corresponding
backward signal codes that vary from trunk to trunk. A number of
user defined spares are provided.
Table 22. IISDN_R2MFCP_GROUP_B_CALLED_LINE_
CONDITIONS Enumeration
Name Description Value
IISDN_R2MFCP_LINE_FREE_CHARGE Line is free, charged. 0
IISDN_R2MFCP_LINE_FREE_NO_CHARGE Line is free, no charge. 1
IISDN_R2MFCP_LINE_ALTERNATE_ANSWER Line is free, alternate answer. 2
IISDN_R2MFCP_LINE_BUSY Line busy. 3
IISDN_R2MFCP_LINE_OUT_OF_ORDER Line is out of order. 4
IISDN_R2MFCP_LINE_UNALLOCATED Line is unallocated. 5
IISDN_R2MFCP_LINE_CONGESTION Circuit congestion. 6
IISDN_R2MFCP_LINE_SPARE_CONDITION_1 Spare 7
IISDN_R2MFCP_LINE_SPARE_CONDITION_2 Spare 8
IISDN_R2MFCP_LINE_SPARE_CONDITION_3 Spare 9
IISDN_R2MFCP_LINE_SPARE_CONDITION_4 Spare 10
IISDN_R2MFCP_LINE_SPARE_CONDITION_5 Spare 11
IISDN_R2MFCP_LINE_SPARE_CONDITION_6 Spare 12
IISDN_R2MFCP_LINE_SPARE_CONDITION_7 Spare 13
IISDN_R2MFCP_LINE_SPARE_CONDITION_8 Spare 14
IISDN_R2MFCP_LINE_SPARE_CONDITION_9 Spare 15