ISDN Interfaces
5-15
Strata CTX I&M September 2002
jack pin configuration and communication parameters are the same as RPTU (see
,
). For RBSU monitor jacks, see
.)
RBSU/RBSS Premise Wiring Guidelines
Grounding Terminal Screws
TB3 is a screw terminal that can be used to connect a ground wire to the RBSU PCB (see
for the location). This ground enables the RBSU/RBSS to meet Electro Magnetic Compatibility (EU)
requirements. The RBSU complies with EU requirements without grounding TB3 on the RBSU, so it
is not necessary to connect a ground wire to TB3.
BRI Wire Type Recommendations
CAT5 wire is recommended for ISDN BRI customer-premises wiring. While the ISDN BRI signal
works for some distance over almost any wire that is suitable for analogue voice service, better wire
enables longer runs. CAT5 provides better 100-ohm impedance matching (at little extra cost) between
the RBSU/RBSS circuit and the station Terminal Equipment (TE-1).
Normally the CAT5 wiring does not have to be shielded when used for ISDN BRI premises wiring.
However, the RJ45 jacks on the RBSU/RBSS BRI circuits are shielded and provide a ground shield in
the event that shielded modular plugs and cable are used.
Note
If using shielded cable and plugs, cable runs should only be grounded at the Strata CTX
RBSU/RBSS, RJ45 jacks. To prevent ground loops, do not ground both ends of shielded cable
runs.
Figure 5-12
RBSU/RBSS Location of LEDs and Connector Locations
RBSU/RBSS BRI Cable Jacks and Connectors
In the U.K., the standard connector for ISDN equipment is the eight-pin RJ jack. Patch cables have
eight-pole plugs at both ends. The same pinout applies to both ends of an ISDN cable, which is the
practice of the data world. This means that a flat untwisted cable with an RJ modular plug at both ends
RBSU
Reset Switch
(resets RBSU Firmware)
RS-232C Connector
for Call-Data Monitor
RJ-45 8-pin (shielded)
Modular Connector
BSY
TS
LOS
FS
BSY
TS
LOS
FS
2795
RBSS
3rd Circuit
2nd Circuit
1st Circuit
4th Circuit
BSY
TS
LOS
FS
BSY
TS
LOS
FS
CKT2
CKT1
CKT4
CKT3
TB3 (FG)
TB1 and TB2 (PFT)
Содержание Strara CTX Series
Страница 10: ...Contents viii Strata CTX I M September 2002 ...
Страница 14: ...Introduction xii Strata CTX I M September 2002 ...
Страница 52: ...Strata CTX Configuration 1 38 Strata CTX I M September 2002 ...
Страница 176: ...ISDN Interfaces 5 28 Strata CTX I M September 2002 ...
Страница 278: ...Peripheral Installation 8 32 Strata CTX I M September 2002 ...
Страница 290: ...Index IN 6 Strata CTX I M September 2002 ...