Philips ErgoLine D320 - Cable and Distances

ErgoLine D330/D340
Customer Engineer Manual
Page 2-4
•
Terminal with Speech and Data service requires TEI setting of 0 & 1. This TEI
setting is required as the terminal has a fixed TEI of 1 for the Data service, and
requires this setting for the data service to be available.
Cable and Distances
The S
0
interface consists of two balanced twisted pairs, one pair for Transmit and
one pair for Receive. The distance between the ErgoLine and the Switch depends
upon the configuration and the cable characteristics of the cable used between
the wall socket and the Main Distribution Frame (MDF).
The U
PN
interface consists of one balanced twisted pair with half duplex operation
being used. The cable length is defined by cable type.
T
ABLE
2-1. T
YPICAL
C
ABLE
C
HARACTERISTICS
CHARACTERISTICS
S
0
SPECIFICATION U
PN
SPECIFICATION
Cable impedance
100
Ω at 96kHz
100
Ω at 192kHz
Wire diameter 0.5mm 0.5mm
Loop attenuation < 10dB / km at 96kHz
≤
26dB / km at 192kHz
Round trip delay
< 1
µ
sec / 100m max 23
µ
sec (total)
ErgoLine line cord length < 10m (normally 6m) 6m
ErgoLine line cord
connector
8 pin RJ45 according to
ISO 8877
8 pin RJ45 according to
ISO 8877
Figure 2-1 illustrates possible wiring configurations. The distances given do not
include the length of the ErgoLine terminal line cord: this length is normally 6 m.
When using another cable, the length must be <10 m.
Both twisted pairs must be terminated (preferable in the wall socket) with a 100
Ω
resistor on the location indicated in Figure 2-1.
Note 1
: When using a cable with cable characteristics different from the
ones listed in Table 2-1, the distances indicated will be different.
Note 2
: An intermediate MDF in the connection can also affect the overall
cable characteristics.
Note 3
: When cables are connected together additional attenuation,
caused by the joints, will occur.
When the ErgoLine D330 or D340 terminal is connected via a PNT1 to a DLC-U or a
DLC-C/D the distance can be extended by 1500 m. In this case the attenuation of
the cable used between the PNT1 and DLC may not exceed 15dB (at 100kHz,
without noise insertion).