AT&T Merlin II Feature Module 2 System Manual page 178

CONSIDERATIONS
2-172 Accessory Equipment
FIGURE 2-16 A Basic Telephone and Modem Interface (BTMI).
FIGURE A basic
2-17 telephone connected to a BTMI.
When the system administrator assigns lines to a basic telephone, the
administrator must provide the user with a list of codes for the lines
and/or line pools he or she can access.
While Night Service with Outward Restriction is in effect, people with
basic telephones cannot enter a password to make calls. To allow them
to make after-hours calls, the administrator must assign these basic
telephones to the Exclusion list. (See "Night Service.")
Basic telephones can receive ringing intercom calls, but not intercom calls
with voice announcement.
TEL. DEVICE
RINGING MODE
NORMAL TIMED
Line jack d e v i c e j a c k
4 - P a i r
modular cord modular cord
TIMER JACK
T e l .
2-Pair