Primary and Secondary ISDN Numbers In ARQ And Setup (Q1)

The information in this article applies to: H.323, H.225.0

At least one ISDN GW vendor requires that the two ISDN BRI phone numbers, e.g., 9 835 8661 and 9 835 8663, be placed in the RAS ARQ message, in addition to the Q.931 Setup message. Place the primary in the destinfo field and the secondary on the destExtraCallInfo field.