Host-connected, channel-attached printer

Channels transfer data fast enough that printer throughput is not typically limited. When configuring a system, consider the total data rate requirements of all the devices attached to a channel.

Specify that the channel adapter is to be set in high-speed data-streaming mode if possible. To set this mode, see the appropriate processor and printer publications. The use of other modes can affect printer throughput, in ways that depend on the printer, the application, and the length of the printer channel cable.

An ESCON® channel can send and receive data faster than a parallel channel. With the ESCON channel adapter installed in a printer, the printer can be attached to the host with an ESCON channel or a FICON® Bridge channel. Therefore, IBM® ESCON channel-attached printers that have an ESCON PCI channel adapter with Release 9.6 microcode and the 64 KB I/O buffer microcode enhancement installed might provide additional performance improvements. For information about the ESCON channel adapter support for a printer, see the documentation provided with the printer; for more information about the FICON Bridge channel, see the FICON Bridge feature in the appropriate ESCON Director publication.