3-8
Cisco uBR924 Router Hardware Installation Guide
OL-0338-01 (3/2000)
Chapter 3
Installing the Cisco uBR924 Router
Connecting to Telephones or Fax Devices
Note
Refer to the “Required Tools and Equipment” section on page 2-11. Cisco does
not provide these items.
Step 2
Connect one end of the cable to one of the Phone ports (labeled V1+V2 and V2) at the rear of the router.
Press the cable firmly into the receptacle. (See Figure 3-3.)
Figure 3-3
Telephone Cable and RJ-11 Connector
The V1+V2 connector supports either a single-line analog telephone or a two-line analog telephone that
uses four wires. If using a two-line telephone, line 2 of the telephone behaves as if a single-line
telephone is plugged into the second voice port. In this configuration, devices plugged into the V2 port
act as extensions to the line 2 telephone.
Note
Use only telephones with a pushbutton dial set. Fax/modem cards and software on
a PC can be used but only in fax mode; the data mode of the fax/modem card
cannot be used with the VoIP network. Contact your network management,
provisioning, or operations team to determine if modems are supported across
your VoIP network. When combining telephones and fax devices on a VoIP line,
only one voice call—telephone or fax—can be active on that line at a time.
Step 3
Connect the other end of each RJ-11 cable directly to the telephone or fax device as shown in
Figure 3-3. For multiple telephones or fax devices, connect the other end to an adapter and ensure all
telephones and fax devices are connected correctly on that VoIP telephone line.
Caution
If you are connecting multiple telephones or fax devices to a telephone line, be sure the
sum of the RENs of all devices on any one line does not exceed five. If too many devices
are attached, they may not ring properly.
17652
Cable TV In
Power
Reset
Console
Line
Phone
v1+v2 v2
X
Ethernet 0
X
X
X
1
2
3
4
5V
3A
8V
0.65A
40V
7mA
Cisco uBR924
Use either port
