HP AdvanceStack Internet Router manual Isdn Connections, Isdn BRI Cable Specifications S/T Cable

W A R N I N G

W A R N I N G

Installing the HP AdvanceStack Internet Router

Preparing to Connect to a Network

ISDN Connections

Use a BRI cable to connect the router directly to an ISDN. (See table 2-1.)

Network hazardous voltages are present in the BRI cable. If you detach the BRI cable, detach the end away from the router to avoid possible electric shock. Network hazardous voltages are also present on the system card in the area of the BRI port (RJ-45 connector), regardless of when power is turned OFF.

The ISDN connection is regarded as a source of voltage that should be inaccessible to user contact. Do not attempt to tamper with or open any public telephone operator (PTO)-provided equipment or connection hardware. Any hardwired connection (other than by nonremovable, connect-one-time-only lug) must be made only by PTO staff or suitably trained engineers.

Table 2-1 lists the specifications for ISDN BRI Cables. Refer to the section “ISDN BRI Port and Cable Pinouts” in appendix A, “Cable Specifications” for pinouts.

Table 2-1. ISDN BRI Cable Specifications (S/T Cable)

Specification	High-Capacitance Cable	Low-Capacitance Cable
Resistance (at 96kHz)	160 ohms/km	160 ohms/km
Capacitance (at 1 kHz)	120 nanoFarads/km	30 nanoFarads/km
Impedance (96 kHz)	75 ohms	150 ohms
Wire diameter	0.024 inch (0.6 mm)	0.024 inch (0.6 mm)
Distance limitation	32.8 feet (10 m)	32.8 feet (10 m)

Installation

2-3