[rancid] Need help with backup nortel 5520 configuration

[Snaiper]

*Hi,
i have switch nortel 5520
when I try to telnet my switch it shows an UI (need Press Ctrl+Y)
Is there any support with blogin to Nortel siwtches with UI?
current i found options backup switch through snmp to tftp server

example:

backup text mode
snmpset -v2c -c private <ip switch> .1.3.6.1.4.1.45.1.6.4.2.2.1.5.1 a <ip
tftp server>
snmpset -v2c -c private <ip switch> .1.3.6.1.4.1.45.1.6.4.2.2.1.4.1 s
<name>.cfg
snmpset -v2c -c private <ip switch> .1.3.6.1.4.1.45.1.6.4.4.19.0 i 4
snmpget -v2c -c private <ip switch> .1.3.6.1.4.1.45.1.6.4.2.1.25.0

backup binary mode
snmpset -v2c -c private <ip switch> .1.3.6.1.4.1.45.1.6.4.2.2.1.5.1 a <ip
switch>
snmpset -v2c -c private <ip switch> .1.3.6.1.4.1.45.1.6.4.2.2.1.4.1 s
<name>.cfg
snmpset -v2c -c private <ip switch> .1.3.6.1.4.1.45.1.6.4.2.1.24.0 i 4
snmpget -v2c -c private <ip switch> .1.3.6.1.4.1.45.1.6.4.2.1.25.0

but my problem my version of switch not support
snmpset -v2c -c private <ip switch> .1.3.6.1.4.1.45.1.6.4.4.19.0 i 4
(current i have problem upgrade all switch)

i need support with login options Ctrl+Y

Thanks
Roman
*
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