User's Manual

Selex ES S.p.A.
Information contained in this document may not be used, applied or reproduced for any purpose unless agreed
by Selex ES S.p.A. in writing
33
6.4.2 E1 coax Link
If the RBS is equipped with a DIF module on the rear panel 4 E1 connectors are present. The
following figure shows the rear panel of the DIF module. Configuration of the four links is out of the
scope of this manual. Usually these E1 link are used to establish RBS to RBS links or RBS to RNFE
links.
Interconnecting points
Type of connector terminating
the cable
Type of cable/conductor
E1 link
1.0/2.3 male connector
75 ohm coaxial cable with
double shield
Where, in the equipment described in this document, a E1 interface towards a common backbone is
envisaged, in the followings the backbone features to be assured in order to make the ECOS-D
simulcast networks to work properly are described:
 backbone must work in PDH/SDH technology with E1 stream (no TCP/IP – ethernet, fast
ethernet – packet switched connections can be used to carry communications)
 backbone must guarantee:
 fixed delay (max 20msec end-to-end)
 Jitter must satisfy ITU-T G.823
 Wander < ± 1 µsec
E1 coax Link