ISDN Protocol Administrator's and Developer's Guide ... - Intervoice

Establishing Layer Three LinkIdentifying ISDN Packet InformationAll packet information in ISDN has the same format. Table 14-7describes the packet information from the outbound log below:3/4 9:22:04 R 2 02011214/08028003/4D/08/02/8090 Release 7.0Table 14-7. Translated ISDN PacketElementTranslation02011214 Layer Two Messaging.08028003 Layer Three front end with Call Reference Value (CRV) of 3.This value is the same for all messages during a call’s duration.The next call will have a CRV of four or higher.4DThe type of message (Release, for example). For a complete listof message packet values, see Table 14-9 on page 14-41.08 08 after the message represents the cause code.02 02 after the message represents its length.8090 This is the cause code. The valid cause code range is 0x0 –0x7F. For a complete list of cause code values, see Table 14-10on page 14-42.8090 = 1000 0000 1001 0000 in decimal numbering. The upperbits are ignored. 001 0000 = 0 x 10 = 16 (decimal numbering).16 indicates Normal Call Clearing.60001262, First Edition ISDN Console 14-39