WHAT YOU
NEED TO KNOW

FOUR IMPORTANT
QUESTIONS TO
ASK

1. What is the central office switch type? Possible answers include:

   - ATT/Lucent 5ESS
   - Nortel/Northern Telecom DMS xxx ( where xxx is a number )
   

2. What kind of ISDN service is the central office switch configured to provide?

   ATT/Lucent 5ESS switches may be configured as follows:
   

   • Point-To-Point
   • Multi-Point (Custom)
   • NI-1 (National ISDN 1), the most common.

   Nortel/Northern Telecom switches may be configured as follows:

   • DMS Custom
   • NI-1 (National ISDN 1), the most common

3. What are my phone number(s)?
4. What are my SPID's

BTW, if you live in Europe and are accessing this page you may just ignore all this and feel pity for us here in North America.

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