Hi all
hope you can help me with this one. We have a Netware 6.5 SP7 with a AVM B1 PCI ISDN interface and Tobit David XL running. Sometimes the Server hangs with the following abend:

************************************************** *******
Novell Open Enterprise Server, NetWare 6.5
PVER: 6.50.07

Server xxxx halted Monday, 22 December 2008 12.01.40,064
Abend 1 on P00: Server-5.70.07: Double Fault Processor Exception (Error code 00000000)

Registers:
CS = 0008 DS = 0023 ES = 0023 FS = 0023 GS = 0023 SS = 0010
EAX = 8649CEFE EBX = 00000003 ECX = 0000041D EDX = 98F960E8
ESI = 98F960E8 EDI = 98F96040 EBP = 8649CEFE ESP = 9A393000
EIP = 99D2D09F FLAGS = 00010213
99D2D09F E8D0FFFFFF CALL 99D2D074
EIP in AVMCAPI2.NLM at code start +0000909Fh

The violation occurred while processing the following instruction:
99D2D09F E8D0FFFFFF CALL 99D2D074
99D2D0A4 83C404 ADD ESP, 00000004
99D2D0A7 03442408 ADD EAX, [ESP+08]
99D2D0AB 50 PUSH EAX
99D2D0AC E845330000 CALL 99D303F6
99D2D0B1 83C404 ADD ESP, 00000004
99D2D0B4 C3 RET
99D2D0B5 31C0 XOR EAX, EAX
99D2D0B7 8A44240C MOV AL, [ESP+0C]
99D2D0BB 50 PUSH EAX



Running process: Interrupt service routine (nested count 2)
Interrupted process: 4 Process
Thread Owned by NLM: TLD.NLM
Stack pointer: 9A393804
OS Stack limit: 9A3930C0
Scheduling priority: 67371008
Wait state: 5050090 Wait for interrupt
Stack: --98F960E8 ?
99D2A293 (AVMCAPI2.NLM|AVM_Manufacturer+1741)
--98F960E8 ?
--00000003 (LOADER.NLM|KernelAddressSpace+3)
--00000000 (LOADER.NLM|KernelAddressSpace+0)
--00001000 (LOADER.NLM|KernelAddressSpace+1000)
--00000000 (LOADER.NLM|KernelAddressSpace+0)
--00000001 (LOADER.NLM|KernelAddressSpace+1)
--98F96040 ?
99D2A1FA (AVMCAPI2.NLM|AVM_Manufacturer+16A8)
--98F96040 ?
--8649CEFE ?
--0000041D (LOADER.NLM|KernelAddressSpace+41D)
99D29D24 (AVMCAPI2.NLM|AVM_Manufacturer+11D2)
--00001000 (LOADER.NLM|KernelAddressSpace+1000)
--00000000 (LOADER.NLM|KernelAddressSpace+0)
--98F96040 ?
99D2A6D9 (AVMCAPI2.NLM|AVM_Manufacturer+1B87)
--98F96040 ?
-0013FA00 (LOADER.NLM|interruptVectorPool+1080)
-00145D50 (LOADER.NLM|kVirtualInterruptTable96+0)
--98F960FC ?
99D2D485 (AVMCAPI2.NLM|AVM_Manufacturer+4933)
--98F96040 ?
-00145D50 (LOADER.NLM|kVirtualInterruptTable96+0)
--00000023 (LOADER.NLM|KernelAddressSpace+23)
99D2D4EB (AVMCAPI2.NLM|AVM_Manufacturer+4999)
--98F960FC ?
001117E9 (LOADER.NLM|kProcessProtectedModeInterrupt+39)
--00000000 (LOADER.NLM|KernelAddressSpace+0)
-00145D50 (LOADER.NLM|kVirtualInterruptTable96+0)
--00000060 (LOADER.NLM|KernelAddressSpace+60)
--8E3EA448 ?
0011114B (LOADER.NLM|kProtectedModeInterruptContinue+65)
--4B220023 ?
--4B220023 ?
--00000023 (LOADER.NLM|KernelAddressSpace+23)
--7C3AE3C0 ?
--86E4CF80 (NBI.NLM|PrintHelp+48B4)
--00001000 (LOADER.NLM|KernelAddressSpace+1000)
--00000003 (LOADER.NLM|KernelAddressSpace+3)
--7FD67640 ?
--00000000 (LOADER.NLM|KernelAddressSpace+0)
--00000020 (LOADER.NLM|KernelAddressSpace+20)
86F3F373 (NWPA.NLM|Send_Message_To_Next_Filter+63)
--00000008 (LOADER.NLM|KernelAddressSpace+8)
--00000202 (LOADER.NLM|KernelAddressSpace+202)
--00001000 (LOADER.NLM|KernelAddressSpace+1000)
--87A9D140 ?
--7FD67640 ?
--86E4CF80 (NBI.NLM|PrintHelp+48B4)
86F3F54F (NWPA.NLM|CDM_Send_Initial_Message+D3)
--7FD67640 ?
--86E4CF80 (NBI.NLM|PrintHelp+48B4)
--00000000 (LOADER.NLM|KernelAddressSpace+0)
--00000020 (LOADER.NLM|KernelAddressSpace+20)
--196FD6A0 ?
-004B6D28 ?
86F3F644 (NWPA.NLM|CDM_ReadWrite_Message+9C)
--87A9D140 ?
--993D5338 ?
--87A97080 ?
--00000016 (LOADER.NLM|KernelAddressSpace+16)
--993D5338 ?
86ECF253 (MM.NLM|PartitionRandomReadWrite+107)
--87A9D140 ?
--993D5338 ?
--993D5338 ?
--993D53D4 ?
--993D53B8 ?
86EBE553 (MM.NLM|HotfixRandomRead+307)
--87A9D840 ?
--993D5338 ?
--00000020 (LOADER.NLM|KernelAddressSpace+20)
--003ED9C8 ?
-004B6D20 ?
--00000008 (LOADER.NLM|KernelAddressSpace+8)
--87A9D140 ?
--003ED900 ?
--87A97080 ?
--00000016 (LOADER.NLM|KernelAddressSpace+16)
--87A97080 ?
--86DF9A40 ?
--993D53D4 ?
--993D5338 ?
86EC87AE (MM.NLM|MirrorRandomRead+422)
--87A97080 ?
--993D5338 ?
86EBE553 (MM.NLM|HotfixRandomRead+307)
--00000000 (LOADER.NLM|KernelAddressSpace+0)
--00000000 (LOADER.NLM|KernelAddressSpace+0)
--00000000 (LOADER.NLM|KernelAddressSpace+0)
--003ED9C0 ?
87A4D243 (CPQSHD.CDM|(Code Start)+7243)
--87A97080 ?
--00000020 (LOADER.NLM|KernelAddressSpace+20)
--993D5338 ?
--86F902C0 (IDECD.CDM|StringF+210C)
--00000000 (LOADER.NLM|KernelAddressSpace+0)
86EB27A6 (MM.NLM|MM_ObjectIO+156)

Additional Information:
The hardware detected a problem while executing an interrupt service routine. The code being executed is owned by AVMCAPI2.NLM. It may be the source of the problem or there may have been a memory corruption.