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DEFINITYEnterpriseCommunicationsServerandSystem75andSystem85
Terminals and Adjuncts Reference
555-015-201
Issue 11
December 1999
The 500 and 2500 Series Telephones
14-27The 2500 MMGL and 2500 YMGL, 2500 MMGM and 2500 YMGM, and 2554
14
Power Requirements
All of these 2500 Series telephones are powered by the tip and ring leads. These
telephones do not require any external power supply.
Switch Administration
These 2500 series telephones must be administered in the following ways:
■ If the 2500 MMGL, 2500 YMGL, 2500 MMGM, 2500 YMGM, 2554 MMGM,
or 2554 YMGM telephone is connected to a System 75, DEFINITY G1 or
G3, or a DEFINITY ECS, it must be administered as a 2500 analog
telephone.
■ If any of these 2500 Series telephones is connected to a System 85 or a
DEFINITY G2, it can be administered as an analog line.
Power Failure Operation
All of these 2500 Series telephones can be used as an emergency station during
power failure transfer conditions.
FCC Registration
These 2500 telephones are FCC-registered.
UL and CSA Approval
These telephones have been tested and have met the Underwriters Laboratories
(UL) Standards UL 1459 and have also met the Canadian Standards Association
(CSA) Standards CSA-C22.2 No.225-M90.
Hearing Aid Compatible
These telephones are compatible with the inductively coupled hearing aids
prescribed by the FCC.