ADTRAN Battery Backup Unit (L4) manual download
- ADTRAN Battery Backup Unit (L4) manual download
English 
- Bedienungsanleitung ADTRAN Battery Backup Unit (L4)
- ADTRAN Battery Backup Unit (L4) manual
- Mode d'emploi ADTRAN Battery Backup Unit (L4)
- Инструкция по эксплуатации ADTRAN Battery Backup Unit (L4)
- Manuale d'uso ADTRAN Battery Backup Unit (L4)
- Manual de instrucciones ADTRAN Battery Backup Unit (L4)
- Manual de uso ADTRAN Battery Backup Unit (L4)