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Operation
[2] Disable All Downloads – commands the DSU not to accept download of firmware; displayed as
Download Mode when selected
[3] Enable Downloads and Store Zipped – commands the DSU to accept download of firmware,
storing the newly downloaded code as the zipped and inactive Standby Firmware until it is
placed into service by the Switch to Standby Firmware Now command; displayed as Download
Mode when selected
[4] Enable Downloads, Unzip and Execute – commands the DSU to accept download of firmware,
immediately unzipping the newly downloaded code and placing it into operation, while storing
the former operating code as zipped and inactive Standby Firmware; displayed as Download
Mode when selected
[0] Return to Main Menu
The command selections establish the DSU's response to the downloading of firmware. Trivial File
Transfer Protocol (TFTP) is used to perform the actual firmware download, using the following
procedure:
1. Open a second window in which to perform the TFTP functions. Keep the Firmware Down-
load screen on display in order to monitor the Download Status.
2. Initiate a TFTP session to the SCM.
3. At the TFTP prompt type
bin
and press the Enter key so that the transfer takes place in binary mode.
4. Type
trace
and press the Enter key so that activity is displayed during the transfer.
5. Type
put "firmware filename" "address & product code"
and press the Enter key to initiate the actual transfer. The firmware filename is provided with
the firmware that is to be downloaded. The address portion of the address & product code is the
slot/line/drop address when you are downloading to a single unit. There is also a broadcast code
that enables you to send new firmware to all the SC 553 DSUs in a shelf (or pair of shelves) at
once. The figure on the following page provides further definitions of the filename and address
formats.
3-32
SpectraComm 553 Fractional T1 DSU
Installation and Operation Manual
Terminal Interface
076R155-000
Issue 7
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