I need to replace my current DSL modem, centurylink told me I need an ADSL2+ modem. Considering a CenturyLink Technicolor C2000T, which is labeled as Bonded ADSL2+. Not sure what Bonded is, just that I don't currently have it or need it. Is a bonded ADSL2+ modem compatible with a standard ADSL2+ DSL line? My current DSL modem is a ZyXEL C1000Z.