DBL5015同様の

• DBL5021-V
  • Universal speech network
• DBL5001
  • Tone ringer
• DBL5015
  • Compandor
• DBL5021
  • Universal speech network
• DBL5018
  • Low power narrow band FM IF
• DBL5015-V
  • Compandor
• DBL5010
  • Tone ringer with bridge diode
• DBL5002
  • Tone ringer