System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Interfaces
Aastra Proprietary Information Page 3-7
Electrical STM-1 interfaces
The following SIFU modules will be provided:
• STM-1 EL 05HAM00107AAE with SFP electrical
• STM-1 Patch 2 m 05HAM00108ACR with patch cable 2 m
Connections are implemented using coaxial 1.0/2.3-type plug connectors.
E1 interfaces
The following interfaces are available for 2 Mbit/s signals:
• 8 x 2 Mbit/s to the XMP1 PDH kernel via the system bus
• 10 x 2 Mbit/s, 6 dB equipment interfaces (In-house) for the external
connection of electrical 2 Mbit/s signals acc. to ITU-T G.703
(unstructured and structured acc. to ITU-T G.704).
Timing interfaces
The SCU module provides the timing interfaces T3 and T4. The T3 interface
permits an external T3 clock of 2048 kHz to be connected. The impedance
of this interface can be set to highly resistive, 120 Ohms or 75 Ohms.
The T4 timing interface supplies a 2048 kHz clock for synchronizing
external units.
LAN (CU-E)
The LAN interface on the CU-E (Central Unit Expansion) is used to connect
a network management system via a LAN infrastructure.
Internal bus (IB)
Communication between the SCU module and CU-E (Central Unit
Expansion) sub-module mounted on the Central Unit takes place via the
internal bus (IB).
Tab. 3.B: Electrical STM-1 interfaces
STM-1 EL 05HAM00107AAE with SFP electrical
STM-1 Patch 2 m 05HAM00108ACR with patch cable 2 m