
28 Chapter 2 Prerequisites checklist
P0937663 02.0
Table 2 Network device checklist
Network assessment
This section ensures that the network is capable of handling IP Telephony and that existing
network services are not adversely affected.
Table 3 Network assessment
Resource Assessment
You must allocate sufficient resources on the Business Communications Manager for IP telephony.
Prerequisites Yes No
2.a This section of the checklist contains questions about devices on the network such as
firewalls, NAT devices, and DHCP servers.
2.b Is the network using private IP addresses? If the network uses public IP addresses,
complete 2.c. If the network uses private IP addresses, complete 2.d to 2.e.
2.c Are there enough public IP addresses to accommodate all IP telephones and the
Business Communications Manager?
2.d Does the system have a firewall/NAT device, or will the BCM be used as a firewall/
NAT device?
2.e The Business Communication Manager has limited space fore firewall rules. If the
Business Communications Manager is to be used as a firewall/NAT device, do the
firewall rules fit within 32 input rules and 32 output rules?
2.f A hub-based core will not have suitable performance for IP Telephony. Does the
network use a non-hub solution at its core?
Prerequisites Yes No
3.a Has a network assessment been completed?
3.b Has the number of switch/hub ports available and used in the LAN infrastructure
been calculated?
3.c Have the used and available IP addresses for each LAN segment been calculated?
3.d Has DHCP usage and location been recorded?
3.e Has the speed and configuration of the LAN been calculated?
3.f Has the estimated latency values between network locations been calculated?
3.g Bandwidth/CIR utilization values for all WAN links.
3.h Has the quality of service availability on the network been calculated?
Comentarios a estos manuales