Mitel sx-200 User Manual

ˆ

Do the PCs perform adequately on the network—i.e., is this only a 

problem affecting IP Phones? 

- Is the problem an IP configuration issue on the IP devices—i.e., 

DHCP on PCs, DHCP on IP Phones or VLAN issue? 

- Does it work by programming static IP addresses to the IP Phone? 

To PCs?

- Can you route to the internet? 
- Can you ping from PCs to all shared network devices (servers, 

routers, printers, etc.)? 

- Are PC file transfers extremely slow?

ˆ

Where does the problem lie? Within the LAN infrastructure, WAN 

infrastructure, routing between subnets (VLAN's), certain Layer 2 

switches, certain ports on the Layer 2 switch, connection to the 

SX-200 ICP, etc.?

ˆ

Isolate (if possible and after hours). If the problem is reproducible, then 

disconnect voice from the LAN (if it’s a data problem) or the LAN from 

voice (if it’s a voice problem) and retry scenario.

ˆ

Do you have a Network Analyzer (including an Ethernet Tap) that will 

capture information such as broadcasts being received, runts, 

collisions, network utilization, etc.?

- Is the problem experienced on one part of the network or 

throughout? Don't assume only the person complaining has the 

problem (try different areas of the network.

- Make connections or calls to the problem area with the Network 

Analyzer attached and capturing information (one capture from 

source, one capture from destination).