Common use of Transit Service Clause in Contracts

Transit Service. Neutral Tandem Transit Service is defined as a local, intraMTA or intraLATA call that [***]. All transit charges below are charged to the originating LSP. No fees will be paid by Neutral Tandem for any terminating transit traffic. Recurring Charges Transit Service Neutral Tandem MSA Rate (per minute of use) First 10,000,000 minutes-Local [***] Next 15,000,000 minutes-Local [***] All minutes above 25,000,000-Local [***] Optional LNP Query Charges Per Query Per LNP Query [***] Dedicated Transport Charges Per Ds1 (1st Five Miles) [***] Per Ds1 (Each Additional Mile) [***] Trunk Group (1st Trunk Group) [***] Each Additional Trunk Group [***] Non-Recurring Charges Service Order Fee [***] Reconfiguration Charge [***] Install Charge [***] Customer Information Signature /s/ Xxxx Xxxxxxxx Name (Printed) Xxxx Xxxxxxxx Title Vice President-Central Date 12/19/05 Initial: T-Mobile (Customer) Neutral Tandem (Carrier) Offer expires thirty (30) days from the date listed on the Service Order. Neutral Tandem Confidential ***CONFIDENTIAL INFORMATION REDACTED AND SEPARATELY FILED WITH THE COMMISSION Neutral Tandem Service Order – Pricing Attachment Sheet Service Order Exhibit 4 — Cleveland Service Description and Pricing Cleveland Market Pricing — ONLY

Transit Service. Neutral Tandem Transit Service is defined as a local, intraMTA intra MTA or intraLATA call that (i) originates from an on-net local service provider (LSP) and terminates to an on-net LSP via Neutral Tandem; [****]. All transit charges below are charged to the originating LSP. No fees will be paid by Neutral Tandem for any terminating transit traffic. Recurring Charges Transit Service Neutral Tandem MSA Local Transit Rate (per minute of use) First 10,000,000 minutes-minutes - Local [****] Next 15,000,000 minutes-minutes - Local [****] All minutes above 25,000,000-25,000,000 - Local [****] Optional LNP Query Charges Per Query Per LNP Query [****] Dedicated Transport Charges Per Ds1 DS1 (1st Five Miles) [****] Per Ds1 DS1 (Each Additional Mile) [****] Trunk Group (1st Trunk Group) [****] Each Additional Trunk Group [****] Non-Recurring Charges Service Order Fee [****] Reconfiguration Charge [****] Install Charge [****] Customer Information Signature /s/ Xxxx Xxxxxxxx Name (Printed) Xxxx Xxxxxxxx Title Vice President-Central Date 12/19/05 Initial: T-Mobile Sprint PCS (Customer) Neutral Tandem (Carrier) Offer expires thirty (30) days from the date listed on the Service Order. Neutral Tandem Confidential Order ***CONFIDENTIAL INFORMATION REDACTED AND SEPARATELY FILED WITH THE COMMISSION * Confidential information redacted and filed separately with the Commission Neutral Tandem Service Order – - Pricing Attachment Sheet Service Order Exhibit 4 — Cleveland Service Description and Pricing Cleveland and Columbus Market Pricing — - ONLY Transit Service Neutral Tandem Transit Service is defined as a local, intra MTA or intraLATA call that (i) originates from an on-net local service provider (LSP) and terminates to an on-net LSP via Neutral Tandem; [****]. All transit charges below are charged to the originating LSP. No fees will be paid by Neutral Tandem for any terminating transit traffic. Recurring Charges Transit Switching Charges (per minute of use) Neutral Tandem Tariff Rate Neutral Tandem MSA Rate First 10,000,000 minutes [****] [****] Next 15,000,000 minutes [****] [****] All minutes above 25,000,000 [****] [****] Optional LNP Query Charges Per LNP Query [****] [****] Dedicated Transport Charges Per DS1 (1st Five Miles) [****] [****] Per DS1 (Each Additional Mile) [****] [****] Trunk Group (1st Trunk Group) [****] [****] Each Additional Trunk Group [****] [****] Non-Recurring Charges Neutral Tandem Tariff Rate Neutral Tandem MSA Rate Service Order Fee [****] [****] Reconfiguration Charge [****] [****] Install Charge [****] [****] Customer Information Signature Name (Printed) Title Date *** Confidential information redacted and filed separately with the Commission Neutral Tandem Service Order - Pricing Attachment Sheet Service Description and Pricing Connecticut Market Pricing - ONLY

Transit Service. Neutral Tandem Transit Service is defined as a local, intraMTA or intraLATA call that [***]. ] All transit charges below are charged to the originating LSP. No fees will be paid by Neutral Tandem for any terminating transit traffic. Recurring Charges Transit Service Neutral Tandem MSA Local Transit Rate (per minute of use) First 10,000,000 minutes-minutes - Local [***] Next 15,000,000 minutes-minutes - Local [***] All minutes above 25,000,000-25,000,000 - Local [***] Optional LNP Query Charges Per Query Per LNP Query [***] Dedicated Transport Charges Per Ds1 DS1 (1st Five Miles) [***] Per Ds1 DS1 (Each Additional Mile) [***] Trunk Group (1st Trunk Group) [***] Each Additional Trunk Group [***] Non-Recurring Charges Service Order Fee [***] Reconfiguration Charge [***] Install Charge [***] Customer Information Signature /s/ Xxxx Xxxxxxxx Name (Printed) Xxxx Xxxxxxxx Title Vice President-Central Date 12/19/05 Initial: T-Mobile Sprint PCS (Customer) Neutral Tandem (Carrier) Offer expires thirty (30) days from the date listed on the Service Order. 3/30/2006 *** Confidential information redacted and filed separately with the Commission Neutral Tandem Confidential ***CONFIDENTIAL INFORMATION REDACTED AND SEPARATELY FILED WITH THE COMMISSION Neutral Tandem 10/4/2006 Service Order – - Pricing Attachment Sheet Service Order Exhibit 4 — Cleveland Service Description and Pricing Cleveland Market Pricing — ONLYfor Sprint Communications Valid for Neutral Tandem markets in New York served by Verizon Transit Service [***] All transit charges below are charged to the originating LSP. No fees will be paid by Neutral Tandem for any terminating transit traffic. Recurring Charges Transit Service Neutral Tandem Local Transit Rate (per minute of use) Neutral Tandem Local Transit Rate (per call) First 10,000,000 minutes - Local [***] [***] Next 15,000,000 minutes - Local [***] [***] All minutes above 25,000,000 - Local [***] [***]

Transit Service. Neutral Tandem Transit Service is defined as a local, intraMTA intra MTA or intraLATA call that (i) originates from an on-net local service provider (LSP) and terminates to an on-net LSP via Neutral Tandem; [****]. All transit charges below are charged to the originating LSP. No fees will be paid by Neutral Tandem for any terminating transit traffic. Recurring Charges Transit Service Neutral Tandem MSA Local Transit Rate (per minute of use) First 10,000,000 minutes-minutes - Local [****] Next 15,000,000 minutes-minutes - Local [****] All minutes above 25,000,000-25,000,000 - Local [****] Optional LNP Query Charges Per Query Per LNP Query [****] Dedicated Transport Charges Per Ds1 DS1 (1st Five Miles) [****] Per Ds1 DS1 (Each Additional Mile) [****] Trunk Group (1st Trunk Group) [****] Each Additional Trunk Group [****] Non-Recurring Charges Service Order Fee [****] Reconfiguration Charge [****] Install Charge [****] Customer Information Signature /s/ Xxxx Xxxxxxxx Name (Printed) Xxxx Xxxxxxxx Title Vice President-Central Date 12/19/05 Initial: T-Mobile Sprint PCS (Customer) Neutral Tandem (Carrier) Offer expires thirty (30) days from the date listed on the Service Order. Neutral Tandem Confidential ***CONFIDENTIAL INFORMATION REDACTED AND SEPARATELY FILED WITH THE COMMISSION * Confidential information redacted and filed separately with the Commission Neutral Tandem Service Order – - Pricing Attachment Sheet Service Description and Pricing for Sprint Communications Valid for Neutral Tandem markets in New York served by Verizon Transit Service Neutral Tandem Transit Service is defined as a local, intra MTA or intraLATA call that (i) originates from an on-net local service provider (LSP) and terminates to an on-net LSP via Neutral Tandem; [****]. All transit charges below are charged to the originating LSP. No fees will be paid by Neutral Tandem for any terminating transit traffic. Recurring Charges Transit Service Neutral Tandem Local Transit Rate (per minute of use) Neutral Tandem Local Transit Rate (per call) First 10,000,000 minutes - Local [****] [****] Next 15,000,000 minutes - Local [****] [****] All minutes above 25,000,000 - Local [****] [****] Optional LNP Query Charges Per Query Per Query Per LNP Query [****] [****] Dedicated Transport Charges Per DS1 (1st Five Miles) [****] [****] Per DS1 (Each Additional Mile) [****] [****] Trunk Group (1st Trunk Group) [****] [****] Each Additional Trunk Group [****] [****] Non-Recurring Charges Service Order Exhibit 4 — Cleveland Fee [****] Reconfiguration Charge [****] Install Charge [****] Customer Information Signature Name (Printed) Title Date Initial: Neutral Tandem (Carrier) Offer expires thirty (30) days from the date listed on the Service Order. *** Confidential information redacted and filed separately with the Commission Neutral Tandem Service Order - Pricing Attachment Sheet Service Description and Pricing Cleveland New York Market Pricing — - ONLY

Transit Service. Neutral Tandem Transit Service is defined as a local, intraMTA local or intraLATA call that (i) originates from an on-net local service provider (LSP) and terminates to an on-net LSP via Neutral Tandem; [****]. All transit charges below fees are charged to the originating LSP. Neutral tandem’s transit service does not provide a billing clearinghouse function. No fees will be paid by Neutral Tandem for any terminating transit traffic. Recurring Charges Transit Service Neutral Tandem MSA Rate Switching Charges (per minute of use) Per Minute Charge First 10,000,000 minutes-Local minutes [****] Next 15,000,000 minutes-Local minutes [****] All minutes above 25,000,000-Local 25,000,000 [****] Optional LNP Query Charges Per Query Per LNP Query [****] Dedicated Transport Charges Neutral Tandem Tariff Rage Neutral Tandem MSA Rate Per Ds1 DS1 (1st Five Miles) [****] [****] Per Ds1 DS1 (Each Additional Mile) [****] [****] Trunk Group (1st Trunk Group) [****] [****] Each Additional Trunk Group [****] [****] Non-Recurring Charges Neutral Tandem Tariff Rate Neutral Tandem MSA Rate Service Order Fee [****] [****] Reconfiguration Charge [****] [****] Install Charge [****] [****] Customer Information Signature /s/ Xxxx Xxxxxxxx Name (Printed) Xxxx Xxxxxxxx Title Vice President-Central Date 12/19/05 Initial: T-Mobile (Customer) Neutral Tandem (Carrier) Offer expires thirty (30) days from the date listed on the Service Order. Neutral Tandem Confidential ***CONFIDENTIAL INFORMATION REDACTED AND SEPARATELY FILED WITH THE COMMISSION * Confidential information redacted and filed separately with the Commission Neutral Tandem Service Order – — Pricing Attachment Sheet Service Order Exhibit 4 — Cleveland Service Description and Pricing Cleveland Detroit Market Pricing — ONLY

Transit Service. Neutral Tandem Transit Service is defined as a local or intraLATA call that (i) originates from an on-net local service provider (LSP) and terminates to an on-net LSP via Neutral Tandem; [****]. All transit fees are charged to the originating LSP. Recurring Charges Tandem Switching Charges (per minute of use) Neutral Tandem Tariff Rate Neutral Tandem MSA Rate -First 10,000,000 minutes [****] [****] -Next 15,000,000 minutes [****] [****] -All minutes above 25,000,000 [****] [****] Optional LNP Query Charges Per LNP Query [****] [****] Dedicated Transport Charges Per DS1 (1st Five Miles) [****] [****] Per DS1 (Each Additional Mile) [****] [****] Trunk Group (1st two Trunk Groups) [****] [****] Each Additional Trunk Group [****] [****] Non-Recurring Charges Neutral Tandem Tariff Rate Neutral Tandem MSA Rate Service Order Fee [****] [****] Reconfiguration Charge [****] [****] Install Charge [****] [****] Revised 6/29/2004 Pricing valid for 30 days from revision date. *** Confidential information redacted and filed separately with the Commission Neutral Tandem Service Order - Pricing Attachment Sheet Service Description and Pricing for Sprint PCS Valid for all Neutral Tandem markets in Florida served by EMBARQ Transit Service Neutral Tandem Transit Service is defined as a local, intraMTA intra MTA or intraLATA call that (i) originates from an on-net local service provider (LSP) and terminates to an on-net LSP via Neutral Tandem; [****]. All transit charges below are charged to the originating LSP. No fees will be paid by Neutral Tandem for any terminating transit traffic. Recurring Charges Transit Service Neutral Tandem MSA Local Transit Rate (per minute of use) First 10,000,000 minutes-minutes - Local [****] Next 15,000,000 minutes-minutes - Local [****] All minutes above 25,000,000-25,000,000 - Local [****] Optional LNP Query Charges Per Query Per LNP Query [****] Dedicated Transport Charges Per Ds1 DS1 (1st Five Miles) [****] Per Ds1 DS1 (Each Additional Mile) [****] Trunk Group (1st Trunk Group) [****] Each Additional Trunk Group [****] Non-Recurring Charges Service Order Fee [****] Reconfiguration Charge [****] Install Charge [****] Customer Information Signature /s/ Xxxx Xxxxxxxx Name (Printed) Xxxx Xxxxxxxx Title Vice President-Central Date 12/19/05 Initial: T-Mobile (Customer) Neutral Tandem (Carrier) Offer expires thirty (30) days from the date listed on the Service Order. Neutral Tandem Confidential Order ***CONFIDENTIAL INFORMATION REDACTED AND SEPARATELY FILED WITH THE COMMISSION * Confidential information redacted and filed separately with the Commission Neutral Tandem Service Order – - Pricing Attachment Sheet Service Order Exhibit 4 — Cleveland Service Description and Pricing Cleveland Market Pricing — ONLYfor Sprint Communications Valid for all Neutral Tandem markets in Illinois served by AT&T (SBC)

Transit Service. Neutral Tandem Transit Service is defined as a local, intraMTA or intraLATA call that [***]. ] All transit charges below are charged to the originating LSP. No fees will be paid by Neutral Tandem for any terminating transit traffic. Recurring Charges Monthly Transit Service MOU Volume Neutral Tandem MSA Local Transit Rate for LATA 236 (per minute Per Minute of useUse) Washington, D.C. Suburban MD Northern Virginia First 10,000,000 minutes-minutes - Local [***] [***] [***] Next 15,000,000 minutes-minutes - Local [***] [***] [***] All minutes above 25,000,000-25,000,000 - Local [***] [***] [***] Optional LNP Query Charges Per Query Per LNP Query [***] Dedicated Transport Charges Per Ds1 DS1 (1st Five Miles) [***] Per Ds1 DS1 (Each Additional Mile) [***] Trunk Group (1st Trunk Group) [***] Each Additional Trunk Group [***] Non-Recurring Charges Service Order Fee [***] Reconfiguration Charge [***] Install Charge [***] Customer Information Signature /s/ Xxxx Xxxxxxxx Name (Printed) Xxxx Xxxxxxxx Title Vice President-Central Date 12/19/05 Initial: T-Mobile Sprint PCS (Customer) Neutral Tandem (Carrier) * Transit Rate reflects a one-time, Promotional Rate made available to customer for so long as Customer is billed an equivalent rate by Verizon in LATA 236. In the event the transit rates billed by Verison to Customer for LATA 236 increases, the rate charged by Carrier to Customer shall increase by an equal amount less a [***] discount, which shall be no lower than [***] in D.C. and [***] in MD & VA. Offer expires thirty (30) days from the date listed on the Service Order. *** Confidential information redacted and filed separately with the Commission Neutral Tandem Confidential ***CONFIDENTIAL INFORMATION REDACTED AND SEPARATELY FILED WITH THE COMMISSION Neutral Tandem October 4, 2006 Service Order – - Pricing Attachment Sheet Service Order Exhibit 4 — Cleveland Service Description and Pricing Cleveland Market Pricing — ONLYfor Sprint Communications Valid for all Neutral Tandem markets in Wisconsin served by AT&T (SBC)

Transit Service. Neutral Tandem Transit Service is defined as a local, intraMTA or intraLATA call that [***]originates from a designated LSP and terminates to authorized codes designated by Neutral Tandem. All transit charges below are charged to the originating LSP. No fees will be paid by Neutral Tandem for any terminating transit traffic. Recurring Charges Transit Service Neutral Tandem MSA Rate in Qwest Regions (per minute of use) First 10,000,000 minutes-Local Neutral Tandem MSA Rate in Verizon Regions (per minute of use) All local transit minutes [***] Next 15,000,000 minutes-Local [***] All minutes above 25,000,000-Local [***] Optional LNP Query Charges Per Query Per LNP Query [***] Dedicated Transport Charges Per Ds1 DS1 (1st Five Miles) [***] Per Ds1 DS1 (Each Additional Mile) [***] Trunk Group (1st Trunk Group) [***] Each Additional Trunk Group [***] Non-Recurring Charges Service Order Fee [***] Reconfiguration Charge [***] Install Charge [***] Customer Information Signature /s/ Xxxx Xxxxxxxx Xxxx Name (Printed) Xxxx Xxxxxxxx Xxxx Title Vice President, Finance & Planning Engineering & Technical Operations Date 6/21/07 Initials: Neutral-Central Date 12/19/05 Initial: T-Mobile (Customer) Neutral Tandem (Carrier) Offer expires thirty (30) days from the date listed on the Service Order. Neutral Tandem Confidential ***CONFIDENTIAL INFORMATION REDACTED AND SEPARATELY FILED WITH THE COMMISSION Neutral Tandem Service Order – Pricing Attachment Sheet Service Order Exhibit 4 — Cleveland Service Description and Pricing Cleveland Market Pricing — ONLY1