Cisco GLC-LH-SMD= 

1000BASE-LX/LH SFP Transceiver Module, MMF/SMF, 1310nm, DOM

DESCRIPTION

The hot-swappable input/output device plugs into a Gigabit Ethernet port or slot. Optical and copper models can be used on a wide variety of Cisco products and intermixed in combinations of 1000BASE-T, 1000BASE-SX, 1000BASE-LX/LH, 1000BASE-EX, 1000BASE-ZX, or 1000BASE-BX10-D/U on a port-by-port basis.

Cisco GLC-SX-MMD 

1000BASE-SX SFP Transceiver Module, MMF, 850nm, DOM

DESCRIPTION
Type Multimode
* 62.5/125 µm or 50/125 µm (core/cladding) diameter, graded-index, low metal content, multimode fiber optic,
complying with ITU-T G.651 and ISO/IEC 793-2 Type A1b or A1a, respectively

BOSCH LBB1956/00 

Call station, 6-zone

DESCRIPTION

Stylish six-zone call station for the Plena Voice Alarm System
Six zone selection keys, all-call key and momentary PTT-key for calls
Selectable gain, speech filter, limiter, and output level for improved intelligibility
LED indications for zone selection, fault, and emergency state
Call station extension provides seven additional zone and zone group keys

 BOSCH LBB1957/00

Call Station Keypad

DESCRIPTION

Seven zone selection keys
LED indications for zone selection
Up to eight keypads can be connected together

BOSCH LBB1990/00 

Controller, 6-zone

DESCRIPTION

Remote control of the Plena Voice Alarm System
EN 54‑16 certified and EN 60849 compliant
Emergency (EMG) microphone and background (BGM) zone selections
EMG state and fault indicators
Call monitoring loudspeaker

 BOSCH LHM0606/10

Ceiling Loudspeaker 6W Metal with Clamps

DESCRIPTION

Suitable for speech and music reproduction
Flush-mounting in ceiling cavity
Easy to install
Simple power setting
Unobtrusive in virtually all interiors