System Manual
Table Of Contents
- Cisco 860 Series, Cisco 880 Series, and Cisco 890 Series Integrated Services Routers Hardware Installation Guide
- Preface
- Product Overview
- General Description
- Cisco 860 Series ISRs
- Cisco 860VAE Series ISRs
- Cisco 880 Series ISRs
- Cisco 890 Series ISRs
- Hardware Features
- Installing the Router
- Connecting the Router
- Preparing to Connect the Router
- Connecting a PC, Server, or Workstation
- Connecting a Phone
- Connecting an External Ethernet Switch
- Connecting the V.92 modem Port
- Connecting a Terminal or PC to the Console Port
- Connecting a Modem to the Auxiliary Port
- Connecting the 3G Card
- Installing the 3G Adapter for Extended Cable/Antenna
- Connecting a Data BRI Port
- Connecting an FE Line to an FE WAN Port
- Connecting an GE Line to an GE WAN Port
- Connecting an xDSL Line
- Connecting Power over Ethernet
- Connecting the AC Adapter
- Connecting an FXS Line
- Connecting an FXO Line
- Connecting a Voice ISDN BRI Line
- Connecting a Small-form-factor Pluggable Module
- Verifying Connections
- Initial Configuration
- Technical Specifications
- Router Specifications
- Wireless Access Point
- FE and GE Port Pinouts
- Console and Auxiliary Port Connector Pinouts
- FXS and FXO Port Connector Pinouts
- VDSL2 Port Connector Pinouts
- ADSL2+ Port Connector Pinouts
- V.92 Port Connector Pinouts
- G.SHDSL Port Connector Pinouts
- Data BRI Port Connector Pinouts
- Voice ISDN BRI Interface Pin Numbers and Functions
- SFP Port Connector Pinouts
- Cable Specifications
3-32
Cisco 860 Series, Cisco 880 Series, and Cisco 890 Series Integrated Services Routers Hardware Installation Guide
OL-16193-07
Chapter 3 Connecting the Router
Connecting a Voice ISDN BRI Line
Note
If you have specified the use of a private line automatic ringdown (PLAR) off-premises extension (OPX)
connection mode for an FXO voice port (with loop resistance less than 8000 Ohm), you must ensure that
the soft-offhook option is enabled on the port.
This option allows a stepped offhook resistance during seizure, which avoids overloading the circuit
during offhook in the event that ringing voltage is present on the circuit at the same time as the trunk
seizure. The stepped offhook resistance is initially set to 800 Ohms, then adjusts to 50 Ohms when
ringing voltage is not present.
To enable the soft-offhook command on the port, and to access the connection command with plar opx
syntax, see the Cisco Command Lookup Tool.
Connecting a Voice ISDN BRI Line
Use a straight-through RJ-45 cable to connect the voice BRI port to the ISDN network through a
telephone outlet or other device.
Caution
To prevent damage to the router, be sure to connect the BRI cable to the BRI connector only, and not to
any other RJ-45 connector.
To connect the voice BRI line, follow these steps:
Step 1
Connect one end of a straight-through RJ-45–to–RJ-45 cable to the Voice BRI port.
Note
When the interface is configured as NT and is connecting to a TE device, use a crossover cable.
See Table A-13.