The newest 2500 telephones are the 2500 MMGN and 2500 YMGP desk model telephones, and the 2554
MMGN and 2554 YMGP wall model telephones. These models will take the place of the 2500 MMGM,
2500 YMGM, 2554 MMGM, and 2554 YMGM, which will be discontinued as of December 31, 1999.

Like the original 2500 sets, these new 2500 telephones are single appearance analog telephones with
conventional touch-tone dialing.The 2500 MMGN and 2554 MMGN telephones have NO feature buttons.
The 2500 YMGP and 2554 YMGP telephones are equipped with a FLASH button, a Message Waiting light,
 a REDIAL button, a HOLD button, and a MUTE button. All six of these telephone models provide access
to features through the use of the * or # dial pad keys and the appropriate feature access codes.

These 2500 Series telephones are automatically set for touch-tone dialing. The Positive Disconnect feature,
which ensures faster, cleaner termination of calls when the user presses the switchhook, is also set at the
factory.

For a list of previous model 2500 phones and their ordering codes, see the article " How can I tell which
model of single line 2500 phone I have?". It contains a comparison chart to identify each model by its
features.