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4-2 Issue 2.0 December 1995
MERLIN LEGEND
Voice Port Requirements
The Intuity system voice ports must be connected to tip/ring ports on a Basic
Telephone Module (BTM-012). The MERLIN LEGEND system must contain a ring
generator for ringing the BTM ports on
each carrier
that has a BTM board.
There are two limitations on the number of Intuity voice ports that can be
connected to the same BTM:
■ Ring Blocking
A maximum of four ports on a BTM can be rung at any one time. Due to
this limitation, a maximum of eight ports on a BTM can be used for Intuity
voice ports.
■ Touch-Tone Receivers (TTR)
Two TTRs are provided on each BTM. Unless additional TTRs are
available, a maximum of four ports on a BTM can be used for Intuity voice
ports. Additional TTRs are provided on 400 GS/LS/TTR, 400 LS/TTR and
other circuit modules. Approximately one TTR is required for each two
Intuity voice ports, but the level of system activity may make TTRs on other
circuit modules unavailable for Intuity voice port use. Consult the MERLIN
LEGEND Communication System documentation for more details.
As a general rule, use a separate BTM board for every four ports unless
additional Touch-Tone receivers are available. Use a maximum of eight ports
when additional Touch-Tone receivers are available.
Unused BTM ports may be used for single-line sets (SLS), fax machines,
modems, and phantom stations (an assigned extension with no physical
telephone set). The limitation is based on the number of ports that may require
ringing at the same time.
All
unused ports can be used for devices
that will never
ring.
The recommendations in Table 4-1 should be followed for devices that may
ring.
Table 4-1. BTM-012 Ringing Capacity
Intuity Voice Ports Ringing SLS, Modems, FAX
80
70
61
52
42
33
23
14