Maintenance Guide

Cobham Wireless
idDAS Installation and Maintenance Guide 00109GU Rev. 2.0
Page | 3
1.2 Architecture
The idDAS solution consists of the following main elements – refer to Figure 1-2:
x APOI — Active Point of Interface. A headend service conditioning unit that supports up to 16 BTS
sectors (+30dBm max input power) via up to eight, modular plug in band specific modules. See
Section 1.3.1 for A-POI interfaces.
NOTE: Some Public Safety installations include POI instead of APOI equipment.
x MTDI — Multi-Technology Digital Interface. Digitizes and filters RF signals from APOI (up to 16
channels) or POI (up to 8 channels) sources via four band specific plug-in modules covering all common
frequencies. See Section 1.3.2 for MTDI interfaces.
x MSDH — Multi-Sector Digital Hub. Serves as the central switching hub and control system of the idDAS.
All digitized cellular resources converge at the MSDH through CPRI links and are then distributed to the
relevant remote units. Two MSDH models are available: Master MSDH and Slave MSDH. Management is
implemented via the Master MSDH. A Master and a Slave unit can be cascaded for single source
management of the remote units connected to both. See Section 1.3.3 for MSDH interfaces.
x idRU — idDAS Remote Unit. IP66 outdoor unit with four band support. A range of models are available
for medium power (32dBm per band) and high (40dBm per band). The idRU serve as the backhaul port
for any IP device or switch in the neighborhood, distributing combined cellular and data services. See
Section 1.3.4 for idRU interfaces.
x Management — all idDAS system elements are managed via a web session to the Main MSDH unit.
Figure 1-2. idDAS System Architecture
* idRU 30 = idRU Medium Power
** idRU 40 = idRU High Power