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Channel and Local Area Network Attachments

Infoprint 4000 and Infoprint 4100 printers support a variety of attachments:

See Host System Attachment Choices for specifics on printers and host systems that support each of these attachments.

Infoprint 4000 and Infoprint 4100 printers support up to two attachments. The two attachments may be the same (for example, two ESCON channels) or mixed (for example, one ESCON and one Token Ring). The exception is that the printer can have only one TCP/IP attachment of any type. You cannot have two Token Ring attachments; two Ethernet attachments; or two FDDI attachments (AFCCU microcode levels 11.x and earlier only); or a combination of TCP/IP attachments (for example, one Token Ring attachment and one Ethernet attachment). The Infoprint 4100 can support a FICON attachment. When a FICON attachment is used, the second attachment cannot be a FICON attachment. The RISC System/6000 with AFCCU microcode Version 12.0 and later supports two active attachments simultaneously, one for host data and the second, Ethernet, for monitoring.

For duplex systems operating in dual simplex mode, only one attachment is needed to connect the two simplex engines to the system. Although the system consists of two printer engines, it is driven by a single control unit. The two simplex engines require two contiguous addresses on an ESCON, FICON, or parallel channel (beginning with an even-numbered address). When the printing system is operating in duplex mode, the printers can use one of these addresses or a separate address on the same channel.

When the printing system is printing in dual simplex mode, each printer engine can use a different attachment to the same or different systems. For example, Printer 1 can be printing jobs from an MVS(TM) system attached through an ESCON channel, while Printer 2 is printing jobs from an AIX(R) system attached through a Token Ring.

When the printing system is printing in duplex configuration, only one attachment can be active at any given time. If both attachments are to the same system, a tightly-coupled system, ESCON, or FICON with Assign/Unassign and the attachments are of the same type (for example, both are ESCON), switching between the two attachments can be performed dynamically by the host system. If the attachments or hosts differ, or the hosts are not tightly-coupled, or Assign/Unassign is not used with ESCON or FICON, switching must be performed manually by the operator. The printer must be disabled from the current system and attachment before it can be enabled to the other attachment.

You can enable both ESCON or FICON links at the same time at the printer and then print jobs from different hosts without interference. This is done by the automatically enforced vary on/off (assign/unassign) protection. See ESCON Multiple Host Environment for details and prerequisites.

As you plan the type and transfer mode for your channel-attachment configuration, refer to the system reference manual for your host system.

Verify with your planning coordinator that the desired attachment cables and any converter or extender hardware boxes are ordered when the printer is ordered.