| Role
of DPC and OPC in SS7 |
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| DPC
– Destination Point Code (14 bit ó 16384 SPs) |
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| Termination
point of application transaction |
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| Key information
for routing within SS7 network |
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| DPC is inserted
by the originating MTP ”user”. |
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| OPC
– Originating Point Code (14 bit) |
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| Originating
point of application transaction |
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| The ”network
indicator” in the SIO octet determines |
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| whether the
DPC or OPC is an international, national, or |
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| network
dependent SP identifier. |
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