                          DIGITAL               J                                                             December, 1991    F           VAX Wide Area Network (WAN) Device Drivers V1.2 Cover Letter    I           VAX WAN Device Drivers V1.2 contains the VMS device drivers for I           for Digital's synchronous communications devices when operating +           in a DECnet Phase IV environment.   D           This cover letter includes information not found elsewhereG           in the VAX WAN Device Drivers V1.2 Documentation. Please read H           this cover letter before you install or use the VAX WAN Device            Drivers V1.2 software.  -           Reason for This Maintenance Release   F           This maintenance release of VAX WAN Device Drivers provides:  H           o  Support for the DSW21, DSW41 and DSW42 synchronous devices.  H           o  Support for all current VAX processors. See the System Sup-H              port Addendum (SSA 29.64.xx) for full details of processors              supported.   J           o  Support for the Bisync protocol in the ZSDRIVER for the DSH32              and DST32 devices.   E           o  New versions of the drivers that fix all known problems.     J                                                                          1                 D           You should install the new software if you wish to use theI           DSW21, DSW41 or DSW42 synchronous devices, or if you are having G           problems with the old software. However, as this is a mainte- J           nance release, unless you are currently having problems, you can2           install the new kit at your convenience.  $           Installation of VAX P.S.I.  H           If you intend using the DSW21, DSW41 or DSW42 devices with VAXH           P.S.I. V4.3, please ensure that you use the latest fix kit for           VAX P.S.I. V4.3.  6           DMR11, DMV11, KMV1A, KMS1P and KMS11 Devices  I           The VAX WAN Device Drivers product supports many different syn- I           chronous communications devices, some of which overlap in func- I           tionality. The DMR11, DMV11, KMV1A, KMS1P and KMS11 synchronous H           devices have been replaced by newer devices. Consequently, VAXF           WAN Device Drivers for DECnet/OSI Phase V has withdrawn sup-D           port for these synchronous devices as part of a program toE           rationalize the range of synchronous communications devices            supported.  J           Customers using DMR11 devices should consider moving to Ethernet'           and the DEMSA server product.   G           Customers using DMV11 or KMV1A devices should consider moving I           to DSV11 devices, while customers using KMS1P and KMS11 devices 2           should consider moving to DMF32 devices.  G           To help customers move to these replacement devices, trade-in F           programs are available in certain cases. Please contact your:           local Digital sales office for more information.  J                                                                AV-PD40C-TE                   2                  8           Copyright  1991 Digital Equipment Corporation                                                                            J                                                                          3