Instruction manual

Control Unit
Table 3–
1, Continued
Module
Line/
Trunk Description
800
NI-BRI
*
BRI
Capacity: 8 BRIs, each with 2 B-channels (“
virtual
” lines) for voice and
data and 1 channel used for signaling.
Supports: See section “800 NI-BRI” module for details. Voice, data,
video, and other services at 64 kbps over standard ISDN lines/trunks.
400
†
LS and TTR Capacity: 4 lines/trunks, 4 TTRs, 1 power-failure transfer (PFT) telephone
Supports: A PFT telephone
400EM Tie trunk Capacity: 4 tie trunks
400 GS/LS LS or GS
and TTR
Capacity: 4 lines/trunks, 4 TTRs, 1 PFT telephone
Supports: A PFT telephone with ground-start (GS) button
408
†
LS Capacity: 4 lines/trunks, 8 extensions, 1 PFT telephone
Supports: Analog multiline telephones; CMS; a PFT telephone
408 GS/LS LS or GS Capacity: 4 lines/trunks, 8 extensions, 1 PFT telephone
Supports: Analog multiline telephones; CMS; PFT telephone (GS button
needed)
408 GS/LS-
MLX
‡
LS or GS Capacity: 4 lines/trunks, 1 PFT telephone, 8 digital extension jacks for
MLX extensions, including:
— MLX voice only
— MLX voice with Voice Announce to Busy
— MLX voice and ISDN terminal adapter
— MLX voice and MFM with T/R adjunct
— ISDN terminal adapter only
800
†
LS Capacity: 8 lines, 2 PFT telephones
Supports: 2 PFT telephones
800 DID DID and
TTR
Capacity: 8 lines/trunks, 2 TTRs
800 GS/LS LS or GS
and TTR
Capacity: 8 lines/trunks, 2 PFT telephones
Supports: 2 PFT telephones with ground-start (GS) button
800
GS/LS-ID
§
LS or GS Capacity: 8 lines/trunks, 2 PFT ports; 2 TTRs
Supports: Caller ID (ground-start trunks only) that, if you subscribe to
caller identification from the local phone company, displays the numbers
of incoming callers (from supported areas) on MLX display phones.
* This module is not compatible with releases prior to Release 4.0.
†
Although these MERLIN

II modules are supported, the following are recommended for
the system: 400 GS/LS, 408 GS/LS, 408 GS/LS-MLX, 800 GS/LS, and 800 GS/LS-ID.
‡
This module is not compatible with releases prior to Release 2.0.
§
This module is not compatible with releases prior to Release 3.0.
System Components 3–
7