Concord Communications Group, Inc.
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Solutions to Common Questions/Issues
Can I keep my phone number?
Do I need "roll over" lines?
How do I cancel service from my current phone company?
Will 911 service work with my new system?
Can we have direct dial phone numbers?
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Phone User Manuals / Cut Sheets
Grandstream DP720 Wireless Phone
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Guide to Extension Command Codes
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Grandstream 2160-Making a Call
Grandstream 2160-Answering the Phone
Client Care Program
Client Care Program and Replacement Phone Policy
Help Desk Software