Cisco CISCO776 Installation Guide - Page 51

Connecting a Digital Telephone with an External Power Supply,

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Figure 4-1 ISDN Telephone to Router Connection (Cisco 766 Shown) H10772 CONFIG 10BASET NODE HUB Link ISDN S/T ISDN U S0 NT-1 +-350VV------10.5.2AA++/-/-52%5% RJ-45-to-RJ-45 cable RJ-45-to-RJ-45 cable ISDN wall jack ISDN telephone Connecting a Digital Telephone with an External Power Supply This section describes how to connect an ISDN telephone that requires an external power supply to the router. Depending upon the ISDN telephone model and power supply model you use, the procedure to connect the ISDN telephone and power supply might differ slightly. This example procedure describes how to connect an AT&T ISDN telephone (model ISDN 8510T) and an AT&T external power supply (model MSP-1). Also refer to the instructions provided by the manufacturer of the telephone. ISDN and Analog Telephone Devices 4-3

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ISDN and Analog Telephone Devices
4-3
Figure 4-1
ISDN Telephone to Router Connection (Cisco 766 Shown)
Connecting a Digital Telephone with an External Power Supply
This section describes how to connect an ISDN telephone that requires an external power
supply to the router. Depending upon the ISDN telephone model and power supply model
you use, the procedure to connect the ISDN telephone and power supply might differ
slightly. This example procedure describes how to connect an AT&T ISDN telephone
(model ISDN 8510T) and an AT&T external power supply (model MSP-1). Also refer to
the instructions provided by the manufacturer of the telephone.
CONFIG
+5V ---1.5A +/-5%
-30V--- 0.2A +/-25%
S
0
NT-1
ISDN U
ISDN S/T
Link
NODE
HUB
10BASET
H10772
ISDN telephone
ISDN wall jack
RJ-45-to-RJ-45 cable
RJ-45-to-RJ-45 cable