Lucent Technologies 555-661-140 manual Release 4.2 Enhancements June, MLX-5 and MLX-5D Telephones

MERLIN LEGEND Communications System Release 6.1	Issue 1
Installation 555-661-140	August 1998
Prior Releases Features and Enhancements	Page xl
Release 4.2 Enhancements (June, 1997)

MLX-5 and MLX-5D Telephones

The MLX-5 nondisplay and MLX-5D display telephones are compatible with all system releases. The display telephone includes a 2-line by 24-character display, and both telephones come with 5 line buttons. In systems prior to Release 5.0, the MLX-5 and MLX-5D telephones are treated as MLX-10 and MLX-10D telephones respectively. As of Release 5.0, the system recognizes the MLX-5 and MLX-5D telephones as 5-button telephones.

If these telephones are connected to communications system releases prior to

5.0they are recognized by the communications system as 10 button telephones.

Release 4.2 Enhancements (June, 1997)

Release 4.2 includes all Release 4.1 functionality, plus the enhancements listed below. There are no hardware changes for Release 4.2.

Additional Network Switch and Services

Options for ISDN Primary Rate Interface (PRI)

Release 4.2 of the system supports connectivity to MCI®or local exchange carrier (LEC) PRI services and to the following central office switch types (in addition to the 4ESS™ and 5ESS ®switch types that carry for AT&T Switched Network services):

■NORTEL®DMS™-100 BCS 36 for local exchange carrier services

■NORTEL DMS-250 generic MCI07 serving the MCI network

■Digital Switch Corporation DEX600E generic 500-39.30 serving the MCI network

Beginning with Release 4.2, the following MCI PRI and PRI local exchange carrier (LEC) services (along with AT&T Switched Network Services) can be provided to users of the MERLIN LEGEND Communications System: