F680 from ISP - can't even read a signature

[leshniak]

Description of new feature
This is a ZTE F680 from ISP, I cannot even read the signature due to an error in zcu module.

Describe alternatives you've considered
e.g. I have tried using --payload xxx but I get the following error < error >

Additional context

# python3 examples/signature.py f680.bin
Traceback (most recent call last):
  File "/Users/leshniak/zte-config-utility/examples/signature.py", line 22, in <module>
    main()
  File "/Users/leshniak/zte-config-utility/examples/signature.py", line 16, in main
    zcu.zte.read_header(args.infile)
  File "/Users/leshniak/zte-config-utility/lib/python3.12/site-packages/zcu-0.4.0-py3.12.egg/zcu/zte.py", line 17, in read_header
AssertionError

Starting Nmap 7.94 ( https://nmap.org ) at 2024-04-26 12:04 CEST
Nmap scan report for 192.168.5.1
Host is up (0.0032s latency).
Not shown: 996 closed tcp ports (conn-refused)
PORT    STATE    SERVICE
23/tcp  filtered telnet
53/tcp  open     domain
80/tcp  open     http
443/tcp open     https

Nmap done: 1 IP address (1 host up) scanned in 1.87 seconds

Attach config.bin for your device
f680.bin.zip

[mkst]

Closing as dupe of #15.