Nortel Networks Circuit Card 311 - Manual (Page 1101)

Applications 1101
Prompt Response Description
USER xxx Enter the user of port x. The values that can be entered
depend on the software being used. See Software Input/Output
Reference — Administration (NN43001-611) for details.
XSM (NO) YES Port is used for the system monitor.
Applications
The QPC513 Enhanced Serial Data Interface card is used any time that
a high-speed, fully synchronous serial data communication channel is
needed. The ESDI card is typically used to connect to the following:
• A host computer using Meridian Link
• An auxiliary processor
The system processor transfers data to the ESDI card in blocks consisting
of 1 to 128 eight-bit octets. Each block is processed in accordance with
the LAPB subset of the HDLC protocol and is transmitted serially to the
output port.
In receive mode, the EDSI card receives data serially from the input port
packages in LAPB information frames. After determining that the block
is error-free, the ESDI card supplies the data to the system processor as
a block.
The ESDI card serial ports terminate on the card front panel. Figure 313
"QPC513 ESDI card cabling" (page 1102) shows the typical ESDI card
connections in a system.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.