Subject	HiPath 3800	HiPath 3550    HiPath 3500	HiPath 3350    HiPath 3300
Feature available in	x	x	x
Hardware requirements	STMD3 or ISDN adapter	STLS4 STLS4R    or ISDN adapter	STLS4 STLS4R    or ISDN adapter
Software requirements	V5.0 or later	V1.0 or later	V1.0 or later

Subject	Dependency/Restriction
MSN	MSNs are assigned in the DID number field for each ISDN terminal. This number is used as the internal SPID for the device.
Primary Directory Number (PDN)	The PDN associated with public network BRI link must be entered in the DID field for the ISDN terminal to initiate calls to the external network.
MSN for internal use only	Enter a seven-digit number not associated with the PDN in the DID field.
External SPIDs	The public network SPIDs for the ISDN links can be assigned to any station in the system.
B channels	The number of external data calls is limited to the number of B channels installed in the system.
Access	B channels are dedicated to the specific ISDN terminal and should be placed in a separate trunk group to ensure access if more than one BRI trunk is installed.
MSN	If the MSN for a Setup is missing or invalid, a default MSN appropriate to the situation is used. When a station number is specified that is already in use (optiPoint), the Setup is rejected. If an MSN is too long, a right-justified evaluation of the digits is performed.