28(46)
Date
Rev
Documentnumber
Prepared
Doc respons/Approved
Checked
Reference
1998-05-29
L
1531-BDV BS 101 01 Uen
INSTALLATION INSTRUCTION
Subject responsible
7
INTEGRATED CORDLESS
The Integrated Cordless (IC) is a digital cordless tele-
phone solution complying to the DECT standard pro-
viding wireless connection for up to 108 portables with
the A-protocol and 210 portables in GAP-protocol ap-
plications. Several components comprise a complete
system.
After the system has been physically installed use
RASC and the Cordless System Manager (CSM) for
initialization, maintenance, updating, fault finding and
when possible to recover the PBX from errors. The
CSM is orderable under LZYNB 201 01 R6A or higher
for the A-protocol and LZYNB 201 05 R1B or higher for
GAP applications.
7.1
Board Descriptions
7.1.1
IC-Control Unit2 (IC-CU2)
The IC-CU2 is the control board supporting the DECT
GAP-protocol. The IC-CU2 includes 8 voice channel
units and is equipped with 4 BSs interfaces.
The wiring distance with remote power feeding to the
BSs using only the serial communication wires SC0
and SC1 is limited to 400m. For line lengths up to
900m additional Express Power feeding Pairs (EPP)
need to be wired. The maximum wire length between
BS (fed locally) and IC-CU2 is only data limited and
may reach up to 900 meters.
The board offers the following connections:
•
the Cordless System Manager (on a PC)
•
a printer to log errors
•
4 Base Stations
•
the Feature Enabling Control Unit (FECU).
7.1.2
Feature Enabling Control Unit (FECU)
This plug determines which maximum number of port-
ables are allowed to be connected to the system. This
plug is available for various numbers of cordless tele-
phones. For up to 8 portables no plug is required.
7.2
Traffic capacity
The traffic capacity of the Cordless part of the PBX is
mainly determined by the IC-CU_ and in exceptional
cases also by the Base Stations. The IC-CU can han-
dle a maximum of 56 simultaneous calls and the IC-
CU2 can handle up to 60 simultaneous calls. Each
Base Station has a capacity of 8 simultaneous calls.
The traffic capacity of the IC-CU_ is determined by:
•
the Grade Of Service (GOS) required by the
customer
•
the number of speech circuits available, with a
limit of 64.
The Grade Of Service is the probability that a call is re-
jected because of system congestion. The customer
has to indicate which Grade Of Service is acceptable.
A Grade Of Service of 1%, or 0.01, means an average
of 1 lost call in every 100 calls. The IC-CU2 is
equipped with a SPU providing 8 speech circuits.
The two parameters mentioned above (GOS and the 8
speech circuits) and the total amount of traffic (Erlang)
that is required, are related to each other. The table
below shows the capacity at a required GOS.
FECU number
Number of Portables
KDU 130 05/1
16
KDU 130 05/2
24
KDU 130 05/3
32
KDU 130 05/4
48
KDU 130 05/5
64
KDU 130 05/6
108
KDU 130 05/7
210 (only with IC-CU2)
