Multiple / Bonded T1
Multiple T1 lines bond two or more T1 circuits into one logical, dedicated connection for more bandwidth than a single T1 can deliver. Two bonded T1 lines reach about 3 Mbps, three reach 4.5 Mbps, four reach 6 Mbps, and larger groups scale toward roughly 10-12 Mbps. It is the point to point answer for 50 to 100 or more users and bandwidth-intensive applications.
How bonded T1 lines work
Bonding ties two or more T1 lines together so they act as one larger dedicated pipe. Each T1 connection still carries 1.5 Mbps, and the channels are aggregated: 2 bonded T1 lines deliver about 3 Mbps, 3 deliver 4.5 Mbps, and 4 deliver 6 Mbps, scaling toward 10-12 Mbps. Traffic spreads across the circuits point to point to the carrier, and if one line drops the rest keep the connection up.
Typical Multiple T1 pricing
When it fits
✓ Great fit
Larger offices of 50 to 100 or more users and businesses running bandwidth-intensive applications such as streaming and video conferencing that have outgrown a single T1 line. It fits sites where dedicated, point to point reliability and a hard SLA matter and fiber is not available.
● Consider instead
Once you need real throughput, a T3 (DS3) delivers about 45 Mbps and is the natural step up from bonded T1 lines. Where it is available, fiber or business Ethernet provides far more bandwidth per dollar, so consider those if dedicated T1 delivery is not specifically required.
How it compares
Bonded T1 lines aggregate multiple circuits for 3 Mbps and up, while a single T1 connection tops out at 1.5 Mbps.
A T3 delivers about 45 Mbps on one circuit, far more than bonded T1 lines and the logical next step when demand grows.
Fiber is much faster and cheaper per Mbps, while bonded T1 lines win on availability and a long-proven SLA.
What to look for
- ✓Number of circuits. Confirm how many T1 lines are bonded and the resulting aggregate bandwidth on the connection.
- ✓Resilience. Bonded T1 lines degrade gracefully; if one circuit fails the others keep the dedicated connection up.
- ✓Step up to DS3. Ask the carrier when a T3 / DS3 becomes more economical than adding more bonded T1 lines.
- ✓Single logical link. Verify the bonded T1 lines present as one point to point connection with one IP block and SLA.
Common questions
What is a bonded or multiple T1?
Bonding combines two or more T1 lines into one logical, dedicated connection that delivers more bandwidth than a single T1.
How fast are bonded T1 lines?
Two bonded T1 lines reach about 3 Mbps, three reach 4.5 Mbps, four reach 6 Mbps, and larger groups scale toward roughly 10-12 Mbps.
How much do multiple T1 lines cost?
Pricing scales per bonded circuit, generally from around $700 per month for two lines up to several thousand for larger groups.
What happens if one bonded T1 line fails?
The connection stays up on the remaining T1 lines at reduced bandwidth, which makes bonded T1 a resilient point to point option.
When should I move from bonded T1 to a T3?
Once you need more than bonded T1 lines economically provide, a T3 / DS3 at about 45 Mbps is the natural next step.
Are bonded T1 lines dedicated?
Yes. Every T1 line in the bond is dedicated to your business, and together they form one point to point connection with an SLA.
How many users can bonded T1 lines support?
They commonly serve 50 to 100 or more users plus bandwidth-intensive applications, depending on how many T1 circuits are bonded.
More on Multiple / Bonded T1
Multiple T1, also called bonded T1, ties two or more T1 lines together so they act as a single dedicated connection with far more capacity than one circuit. Each T1 line still carries 1.5 Mbps, and bonding aggregates the channels: 2 lines deliver about 3 Mbps, 3 deliver 4.5 Mbps, 4 deliver 6 Mbps, and larger bonds scale toward roughly 10-12 Mbps. The carrier delivers the whole group point to point as one logical link with a single IP block, so it behaves like one bigger dedicated pipe. That makes bonded T1 lines a fit for offices of 50 to 100 or more users and for bandwidth-intensive applications such as streaming and video conferencing.
Bonding also adds resilience, because if one T1 line drops the connection stays up on the others at reduced speed rather than failing entirely. Pricing scales with each bonded circuit, so the connection grows in predictable steps as the business adds lines. When the demand outpaces what bonded T1 lines deliver economically, the step up is a T3, also known as a DS3, which provides about 45 Mbps on a single dedicated circuit.
Types of serviceOptions and variants
What businesses use it for
- ✓High-user office internet. Bonded T1 lines give 50 to 100 or more users one dedicated, point to point connection with an SLA.
- ✓Bandwidth-intensive apps. Aggregated T1 circuits support streaming, video conferencing, and other heavy traffic.
- ✓Resilient connectivity. If a single T1 line fails, the bonded connection stays up on the remaining circuits.
- ✓Scalable point to point links. Add T1 lines to a bond to grow a private site-to-site connection in predictable steps.
- ✓Bridge to fiber or DS3. Bonded T1 lines serve heavier demand until a T3 / DS3 or fiber connection is the better fit.
Multiple / Bonded T1 details
Multiple T1s are perfect for medium and large businesses needing an internet service provider for 50 to 100+ users or companies running bandwidth intensive applications like streaming media or video conferencing. Multiple T1s are bonded 24 channel circuits providing an internet connection straight from the broadband provider backbone. This makes multiple T1s very stable and reliable broadband connections. Depending on your location and T1 provider availability, multiple T1s will normally be priced between $350 and $1,200.
The connectivity ladderHow it compares, and where to go next
Where this connection sits among the options, with the businesses each one fits.
| Service | Connection details |
|---|---|
| Business DSL | 256 kbps to 1.5 mbps connection - Shared line for 5 to 50 users. |
| Fractional T1 Line | 256 kbps to 768 kbps connection - Dedicated line for 5 to 20 users. |
| Integrated T1 Line | 128 kbps to 1.5 mbps connection - Dedicated line for 5 to 30 users plus voice lines. |
| Full DS1 / T1 Connection | 1.5 mbps connection - Dedicated line for 20 to 50 users. T1 lines can also be used for point to point access. |
| Multiple T1 Lines | 1.5 to 6 mbps connection - Dedicated lines for 50+ users and/or high bandwidth applications. Multiple T1 lines can also be used for point to point access. |
| T3 / DS3 Connection | 45 mbps connection - Dedicated line for 100+ users and/or high bandwidth applications. T3 / DS3 connections can also be used for point to point access. |
| OC3 Connection | 155 mbps connection - Fiber or dark fiber line for enterprise applications. OC3 connections can also be used for point to point access. |
| OC12 Connection | 620 mbps connection - Fiber or dark fiber line for enterprise applications. OC12 connections can also be used for point to point access. |
| VPN Solution | Managed hardware VPN solutions for secure private network connections and VPN server software for secure virtual private networks. |