
Chapter 48 Setting up VoIP trunks for fallback 435
BCM 4.0 Networking Configuration Guide
The systems already communicate through a PRI line, which will be configured to be used for
fallback. Both systems already have all keycodes installed for eight VoIP lines, and resources
properly allocated for VoIP trunking. For information about keycodes, see the Keycode
Installation Guide (N0060625).
Each BCM has 10 telephones that will be using VoIP lines. In this setup only eight calls can be
sent or received over the VoIP trunks at one time. If all 10 telephones attempt to call at the same
time, two of the calls will be rerouted to the PSTN or other alternate routes if multiple routing is
set up in the destination code schedule.
System programming for networking and fallback routes
Table 96 provides the settings that are required for both systems to create a fallback network.
BCM Santa Clara BCM Ottawa
• IP address: 47.62.84.1 • IP address: 47.62.54.1
• DNs 3000-3999 • DNs 2000-2999
• From this system, dial 9 to get onto
PSTN
• From this system, dial 9 to get onto PSTN
• Dialing plan: CDP • Dialing plan: CDP, destination code is part
of DN
Routing Routing
• Target DN 2244 (first digit is unique to
system)
• Target DN 3322 (first digit is unique to
system)
• Remote gateway destination digit: 2 • Remote gateway destination digit: 3
• Destination code: 2 • Destination code: 3
• VoIP/private network dialout: no external
#, user dials 2244 (no absorbed digits)
• VoIP/private network dialout: no external #,
user dials 3322 (no absorbed digits)
Table 96 Fallback configuration to create fallback between two systems (Sheet 1 of 2)
Task
Settings for
Santa Clara
Settings for
Ottawa Location in Element Manager
Set up a Control set for each
VoIP line
3321 2221 Configuration > Telephony > All
DNs
Set first preferred Codec G.729 Configuration > Resources >
Telephony Resources >
IP Trunks, H.323 Trunks,
Media Parameters tab.
Set voice activity detection Selected
Set Jitter Buffer Medium
Put 8 VoIP lines into the same
line pool
Pool A through Pool O
Give all system telephones
access to the VoIP line pool
BlocO Configuration > Telephony >
Dialing Plan > Line Pools
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