Service Manual

GSM-204-523
Redundant MCUF firmware compatibility
31st Oct 01
Maint. 3–44
Maintenance Information: Horizon macro outdoor
CONTROLLED INTRODUCTION
68P02902W04-A
Site preparation
To prepare for the firmware update the site must first be taken out-of-service as
follows:
1. Connect a PC to the TTY connection on the master MCUF.
2. At the CUST MMI prompt, disable all CTUs in turn by typing:
shutdown_device <site #> dri * * * <seconds>
Where <site #> is the site number, * * * is the DRI identifier and <seconds> is
the time delay before shutdown occurs.
3. Confirm this action by observing each CTU Tx status LED, which should
extinguish shortly after issuing the shutdown command.
4. Disconnect the 2.048 Mbit/s link
Redundant MCUF firmware update procedure
The following procedure shows how to update redundant MCUF firmware by
placing the redundant MCUF into the master position and downloading code
from a PCMCIA card.
1. Remove the uploaded PCMCIA card from the master MCUF, and ensure
that write protect is switched to OFF.
2. Remove both MCUFs. Insert the PCMCIA card into the original redundant
MCUF then insert this MCUF into the master position.
3. Connect a PC to the TTY connection on the MCUF front panel.
4. At the MMI-ROM prompt, type:
burn
This will flash object 8, the MCUF boot object, from the PCMCIA card onto the
MCUF card. The flash download takes approximately 30 seconds, then the
MCUF will reset.
5. At the MMI ROM prompt, type:
set_site <site #>
Where <site #> is the site number.
The MCUF now carries out a system initialization using data from the PCMCIA
card. After a short wait the screen displays:
Initialization complete. All commands accepted.
The MCUF firmware update is complete and both MCUFs now hold identical
firmware. The MCUF originally removed from the master position may now be
used in the redundant position.
6. Insert the original master MCUF into the redundant position.
The redundant MCUF now requires a 15 minute sync warm up period, followed
by a further delay of four minutes while the two MCUFs achieve phase lock.
Once phase lock is achieved the master MCUF immediately begins codeloading
to the redundant MCUF. Codeloading takes a further 15 minutes.
The process is complete when the following message is displayed on screen:
Redundant MSW is INS
<*><*><*> NEW STANDBY Switch CONFIGURED <*><*><*>