headset buddy | cisco 2.5mm headset adapter

1
Headset Buddy Guide
2
3.5 mm jack

• The 3.5 mm jack is approximately 1/8 inch in
  diameter.
• Most computer and mobile device use the 3.5 mm
  headset audio connection.
• Most music headphones and headsets are
  manufactured with a 3.5 mm connector.

3
2.5 mm jack

• The 2.5 mm jack is approximately 3/32 inch in
  diameter.
• The 2.5 mm jack is standard for telephones that
  support headset including office phones and some
  cordless phones.
• Most 2.5 mm headset produce Mono, single sided,
  audio.