Technical data

Using Technician Interface Software

B-8

303561-A Rev 00

File Handling

The following information applies to configuration files you transfer between a

remote workstation and a Bay Networks router:

• The YMODEM protocol truncates binary files received in a batch transfer

operation. The YMODEM header specifies the truncated size.

• YMODEM sets the file modification timestamp field in the header of all

transmitted binary files. Note, however, that the timestamp is subject to a

specific time-zone reference.

Error Checking

YMODEM performs the following error checks on file transfers between remote

workstations and Bay Networks routers:

• If YMODEM detects 10 or more errors during the transmission or reception

of any one packet, it cancels the transfer in progress.

• If an unexpected error occurs before a file is completely received, YMODEM

deletes the incomplete file.

Canceling a File Transfer

While waiting for the beginning of a file transfer, YMODEM treats two CAN

(Control-x) characters received within 3 seconds of each other as a request to

cancel the operation. CAN characters do not cancel the operation if received while

a transfer is in progress, unless you specify the

option flag in the Technician

Interface

xmodem

command line.

Modem Interface Differences

If you are not using a Hayes compatible modem locally attached to your

workstation, you may need to follow interface line control procedures appropriate

for that modem. Such procedures may be necessary if, for example, quitting the

terminal interface program (for example,

tip

or Wfterm) fails to switch the modem

to an on-hook state. Going on-hook should cause the dialed connection between

the local and the remote modems to be dropped.

You may also encounter differences in modem interface cabling requirements.