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https://www.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.e0za100/e0za10014.htm
When your installation uses ESCON® directors, the ESCON Director Device Support feature enables reporting of ESCON director device errors to z/OS®.
https://www.ibm.com/support/knowledgecenter/en/SSB23S_1.1.0.14/common/m1rhidv.html
IBM 9033 ESCON Director, which provides connectivity and switching among ESCON channels and control units. Connect at least one IBM 9033 ESCON Director port to an IBM z/OS or IBM z/VM system for device support. One IBM 9034 ESCON Converter Model 1 attached to one input⁄output (I⁄O) device with parallel channel adapters to ESCON channels.
https://www.ibm.com/support/knowledgecenter/zosbasics/com.ibm.zos.znetwork/znetwork_74.htm
Dynamically switched through a device called the ESCON Director, which is called switched point-to-point In order to accommodate parallel channel-attached control units and devices, the ESCON conversion mode allows communication from an ESCON channel to …
https://www.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.ieag600/iea2g61007.htm
The HCD unit information modules (UIMs) are a set of modules, apart from HCD, that describe the characteristics of a device, control unit, and ESCON director, supported by z/OS MVS or VM. (From now on, this book will use the term I/O unit for all types of I/O equipment, such as device, control unit, and ESCON director.)
http://www-01.ibm.com/support/docview.wss?uid=isg1_9032DEVICE_9032MVS-ESA
95/09/22 Please note that the ESCON Director Device Support code (MVS feature order code 5872, FMID HSWF100) is required with ESCON Directors. Hardware Service Levels THIS SECTION CONTAINS INFORMATION THAT IS HARDWARE SERVICE LEVEL RELATED.
http://www-01.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_sm/5/877/ENUS9032-005/index.html
The ESCON Director supports attachment of the ESCON Converter Model 1, which allows attachment of control units with parallel interfaces. Model abstract 9032-005 Model 9032-005 includes 24 LED ports standard, upgradable to 248 ports maximum.
https://www.opticatech.com/products/prizm/applications-best-practices/
In addition, Prizm removes the ESCON limitation of 16 LPAR device access per CHPID or inbound director port and allows ESCON device connectivity to 128 LPARs across multiple mainframes for improved flexibility. Distance Support. Prizm is the ideal solution to support ESCON device extension by taking full advantage of the inherent distance benefits of FICON.
https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.2.0/com.ibm.zos.v2r2.ieam900/dp03200.htm
A VARY command was issued for a switch device. The device support code attempted to validate that the correct control unit model and type are indicated in the data returned by the SENSE-ID command. In the message text: sense_id_data ... ESCON Director Device Support (EDDS) Module.
https://en.wikipedia.org/wiki/ESCON
ESCON supports channel connections using serial transmission over a pair of fibers. The ESCON Director supports dynamic switching (which could be achieved prior to ESCON, but not with IBM-only products). It also allows the distance between units to be extended up to 60 km over a dedicated fiber.
http://www-01.ibm.com/support/docview.wss?uid=isg29fafd2510f68d17285256ced0051213e&aid=1
When defining ESCON CTC control units and devices to the CTC channel, the integrated CTC control. unit implementation is no longer perceived to be within the CTC channel. Instead, IOCP views the CTC. control units and devices to be within the CNC or FCV channel at the other end of a CTC connection.
https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.2.0/com.ibm.zos.v2r2.e0za100/e0za10014.htm
ESCON Director Support. When your installation uses ESCON directors, the ESCON Director Device Support feature enables reporting of ESCON director device errors to z/OS®. Parent topic: z/OS base elements descriptions ...
http://www-01.ibm.com/support/docview.wss?uid=isg1_9032DEVICE_9032MVS-ESA
2. 96/02/20 The information in this MVS subset applies to both the 9033 ESCON Director Model 004, as well as the 9032 ESCON Director Model 003. 1. 95/09/22 Please note that the ESCON Director Device Support code (MVS feature order code 5872, FMID HSWF100) is required with ESCON Directors.
http://www-01.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_sm/3/649/ENUS9032-003/index.html
The 9032 Enterprise Systems Connection (ESCON*) Director Model 003 is a newly designed Director product with new and expanded features and functions. Director products provide connectivity and switching among ESCON channels and control units, for selected processors. Standard features include:
https://www.opticatech.com/products/prizm/applications-best-practices/
In addition, Prizm removes the ESCON limitation of 16 LPAR device access per CHPID or inbound director port and allows ESCON device connectivity to 128 LPARs across multiple mainframes for improved flexibility. Distance Support. Prizm is the ideal solution to support ESCON device extension by taking full advantage of the inherent distance ...
https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.1.0/com.ibm.zos.v2r1.e0zb100/baseel.htm
Table 1 lists the base elements and optional features in z/OS® V2R1.The following table headings are used: Name The name of the element or feature. (To help you distinguish elements from features, element names in this column are highlighted.) Last time changed (and equivalent product if …
http://www.redbooks.ibm.com/redpapers/pdfs/redp0158.pdf
The ESCON channel defined as CTC can only support the ESCON CTC CU function and CTC devices. It cannot be used for other I/O device support, such as disk, tape and so on. The ESCON channel defined as CNC can support ESCON CTC control unit definitions and other I/O control unit type definitions, such as disk and tape, if the channel is
https://docs.oracle.com/cd/E61716_01/ELSCG/vsm5escfic.htm
With microcode level D02.06.00.00 or higher, multiple Nearlink device connections through a FICON or ESCON switch or Director on the same port now allow: Up to a total of 16 simultaneous NearLink I/O transfers, which can be spread across multiple targets on as many as 14 NearLink ports.
https://share.confex.com/share/118/webprogram/Handout/Session11009/SHARE_Mar2012_session11009.pdf
ESCON I/O while minimizing impact to I/O devices and applications IBM ESCON Statement of Direction (announced July 12, 2011): “The IBM zEnterprise 196 and IBM zEnterprise 114 are the last System z servers to support ESCON channels. IBM plans to not offer ESCON
https://searchstorage.techtarget.com/tip/Get-connected-FICON-to-ESCON
Get connected -- FICON to ESCON. ... FICON channels can be natively extended to 100 km, but ESCON's reach is only 3 km. ESCON supports far fewer device addresses than FICON. Then there's the question of maintenance and support. IBM has end-of-life'd ESCON, and while it still supports it, the cost of maintaining and supporting older equipment ...
https://wikimili.com/en/ESCON
ESCON (Enterprise Systems Connection) is a data connection created by IBM, and is commonly used to connect their mainframe computers to peripheral devices such as disk storage and tape drives. ESCON is an optical fiber, half-duplex, serial interface. It originally operated at a rate of 10 Mbyte/s, w
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