ISP
Tier 1
ISP
Tier 2/3
Cable
ILEC/
PTT
CLEC/
CAP
IXC
Greenfield IXC
Private Line
Frame Relay/ ATM
Basic DSL
Enhanced DSL
Transparent LAN
Wholesale Dial
ISP ISDN PRI
Broadband Wireless
Dial Internet Access
Cable Internet Access
Dedicated Internet Access
IP Multicast
Hosting
Residential Local Voice
H.323 Long Distance
VSC Tandem/Transit
Integrated Access
Internet
Call Waiting
Click-to-Dial
Intíl. Wholesale Long Distance
Debit/Prepaid Calling
Store-and-Forward Fax
Unified Communication
Access VPN
Cable VPN
Intranet/ Extranet VPN
Transport
Voice
VPNs
Internet
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