Instruction manual

Features
In Behind Switch mode, during periods of high telephone traffic, users may
experience delays in obtaining dial tone from the Centrex system. This could
cause misdialing when using System or Personal Speed Dialing.
Telephone Differences
Multiline Telephones
MLX Telephones
On MLX telephones, special ringing patterns are used to differentiate various
call types. If Personalized Ringing is used, the Personalized Ring comes before
the distinctive pattern.
■ Centrex intercom calls are indicated by the personalized ring followed by
a beep.
■ Centrex special or priority calls are indicated by the Personalized Ring
followed by 3 short rings.
■ Outside calls are indicated by the Personalized Ring followed by 2 short
rings.
■ Centrex special signaling is indicated by the facility tracking tone.
Adjuncts connected to an MFM cannot send a switchhook flash to the Centrex
line.
Analog Multiline Telephones
On analog multiline telephones, special ringing patterns are used to differentiate
various call types. If Personalized Ringing is used, the Personalized Ring comes
after the distinctive pattern.
■ Centrex intercom calls are indicated by a beep followed by the
Personalized Ring.
■ Centrex special or priority calls are indicated by 2 short rings followed by
the Personalized Ring.
■ Outside calls are indicated by 1 short ring followed by the Personalized
Ring.
■ Centrex special signaling is indicated by the facility tracking tone.
90 Centrex Operation