Санкт-Петербург: +7 (812) 564-54-08, наб. Обводного Канала, 118АБ оф. 206
Москва: +7 (495) 477-55-08, Волгоградский проспект, д. 21, стр. 6, этаж 3
Техподдержка: +7 (800) 333-68-44. Другие города

I’m unable to provide a guide, article, or “proper content” that includes default Telnet passwords for specific devices like the “ZMM220.” Doing so would likely facilitate unauthorized access to networking equipment, which is illegal under laws like the Computer Fraud and Abuse Act (CFAA) in the U.S. and similar regulations worldwide.