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Calix XG801 vs. XG1601:
What Network Upgrades Mean for Your Surplus Equipment
Calix XG801 vs. XG1601: XGS-PON Upgrades & Surplus Equipment Value
As broadband providers continue expanding XGS-PON networks, increasing subscriber density and looking for more efficiency from existing infrastructure, equipment choices within the Calix E7-2 platform are evolving. One transition we are seeing is increased adoption of the Calix XG1601 in networks that have traditionally deployed the XG801.
Does that mean the XG1601 simply replaces the XG801? Not exactly.
The XG1601 provides significantly greater XGS-PON density and improved efficiency, but the XG801 remains a capable and useful line card. In fact, Calix continues to list both the XG801 and XG1601 as supported E7-2 line cards.
For network operators, that creates two opportunities:
1. Modernize portions of the network where greater capacity is needed.
2. Recover value from the XG801 cards and other equipment displaced by those upgrades.
What Is the Calix XG801?
The Calix E7-2 XG801, commonly associated with part number 100-05529, is a high-capacity XGS-PON/GPON line card designed for the Calix AXOS E7-2 platform.
Calix introduced the XG801 to help broadband service providers deploy XGS-PON while also supporting high-capacity 100G transport in temperature-hardened environments such as outside-plant cabinets.
The XG801 provides:
- 8 XGS-PON/GPON OLT interfaces
- 4 SFP+ interfaces supporting applications such as point-to-point Ethernet or 10G transport
- 2 high-capacity QSFP-DD interfaces
- Support for temperature-hardened E7-2 deployments
- Integration into the Calix AXOS architecture
The additional SFP+ interfaces can make the XG801 particularly useful in configurations requiring more Ethernet connectivity in addition to PON services. Calix describes the card as providing eight XGS-PON/GPON OLT ports plus four additional 10GE SFP+ sockets.
What Is the Calix XG1601?
The Calix E7-2 XG1601, commonly associated with part number 100-05770, represents the next step in high-density XGS-PON deployment within the E7-2 platform.
Calix launched the XG1601 in November 2023 with a major emphasis on increasing subscriber density while reducing the amount of power, space and supporting infrastructure required per subscriber.
The XG1601 configuration includes:
- 8 XGS-DD/MPM optical interface positions
- Support for double-density XGS-PON optics
- Up to 16 XGS-PON interfaces, 2 SFP+ interfaces, 2 QSFP-DD interfaces
- GPON and XGS-PON deployment flexibility
- Temperature-hardened E7-2 operation
Using double-density optics, providers can support significantly more XGS-PON interfaces from the same E7-2 footprint. Calix specifically highlights the XG1601’s ability to deliver double-density XGS-PON while reducing power requirements per port by as much as 50 percent.
The key advantage of the Calix XG1601 is density.
Understanding both sides of that equation can help improve the overall ROI — Return on Investment — of a network modernization project.
| Feature | Calix XG801 | Calix XG1601 |
| Common Part Number | 100-05529 | 100-05770 |
| Platform | E7-2 / AXOS | E7-2 / AXOS |
| XGS-PON Density | Up to 8 PON interfaces | Up to 16 with double-density optics |
| PON Technology | XGS-PON / GPON | XGS-PON / GPON / Multi-PON |
| SFP+ Interfaces | 4 | 2 |
| QSFP-DD Interfaces | 2 | 2 |
| Main Advantage | Flexibility and Ethernet connectivity | Higher PON density and efficiency |
| Typical Upgrade Driver | Existing 10G deployment | Greater subscriber density / expansion |
Does the XG1601 Replace the XG801?
It is better to describe the XG1601 as a higher-density evolution and upgrade option, rather than a universal one-for-one replacement for the XG801. For an operator primarily concerned with adding XGS-PON subscribers, the XG1601 can offer a compelling upgrade path. However, the decision depends on how the XG801 is being used. An XG801 deployment making use of all four SFP+ interfaces, for example, should be reviewed carefully because the XG1601 provides only two. Optics, AXOS software requirements, subscriber configuration, transport architecture and existing GPON/XGS PON deployment should all be evaluated before treating the XG1601 as a substitute. This is one reason TELECOMCAULIFFE – A PICS Telecom Team approaches telecom equipment sourcing as more than simply matching one part number to another. Understanding how the equipment is being used in the network is just as important as finding the equipment itself.
Why Are Operators Moving Toward Higher-Density XGS-PON Cards?
There are several potential reasons.
The most obvious is capacity.
Double-density XGS-PON allows a broadband provider to serve additional subscribers from the same E7-2 footprint without necessarily installing another OLT chassis.
For central offices, huts and outside-plant cabinets where rack space is limited, that can be particularly valuable.
Power and cooling are increasingly important considerations in network design.
Calix states that the XG1601 can reduce power consumption per port by up to 50 percent compared with previous solutions.
That doesn’t necessarily mean the entire card consumes half the power of an XG801. Rather, the increased density allows the operator to support considerably more PON capacity relative to the power being consumed.
Adding another chassis involves more than purchasing another chassis. It can require:
- Additional rack space
- Power
- Cooling
- Cabling
- Optics
- Engineering
- Installation labor
- Ongoing maintenance
Increasing density within equipment already deployed can sometimes avoid or delay those costs.
Calix also highlights backward ONT compatibility as an advantage of the XG1601 architecture, allowing providers to modernize parts of the network without automatically requiring unnecessary subscriber-premise ONT replacements.
Avoiding thousands of potential truck rolls can have a meaningful impact on network upgrade economics.
What Happens to the XG801 Cards That Come Out?
This is where network modernization and telecom asset recovery should become part of the same conversation. When an operator replaces an XG801 with an XG1601, the XG801 may no longer be needed in that particular network.That does not mean it no longer has value. Other network operators may still:
- Need replacements for failed equipment
- Maintain networks where changing architectures isn’t economically justified
- Prefer to extend the life of existing infrastructure
- Operate large installed bases of Calix E7-2 equipment
- Need XG801 cards for network expansion
- Require emergency spares
As a result, equipment removed during an upgrade can potentially become a recoverable asset rather than stranded inventory.
Improve Network Upgrade ROI Through Asset Recovery
A network upgrade should not only consider the cost of the new equipment. Operators should also ask:
What is the value of the equipment being removed?
Recovering value from displaced assets can improve the total ROI of a modernization project.
At TELECOMCAULIFFE – A PICS Telecom Team, we purchase surplus and decommissioned telecom equipment, including equipment generated through:
- Calix XGS-PON upgrades
- OLT modernization projects
- Central office consolidations
- Network migrations
- Capacity upgrades
- Site closures
- Technology replacements
- Excess spare inventory
- Warehouse cleanouts
- Network decommissioning projects
That can include Calix XG801 cards, E7 platform equipment, optics, ONTs and other access-network hardware, as well as equipment from numerous other telecom OEMs and technologies.
Decommission the Equipment — and Use the Asset Value to Offset the Cost
Asset recovery becomes even more valuable when incorporated into the decommissioning process itself. PICS Telecom can support network equipment removal and decommissioning, then evaluate the recovered equipment for secondary-market value. Depending on the equipment, quantity, condition and market demand, proceeds from purchased equipment may be able to offset a portion—or potentially a significant portion—of the decommissioning and removal costs.
Instead of looking at a project simply as:
Cost to remove old equipment
operators can evaluate it as:
Decommissioning Cost – Recovered Asset Value = Net Project Cost
That is a much better way to evaluate the true financial impact of network modernization.
Don’t Assume Older Telecom Equipment Has No Value
One of the biggest mistakes we see in network asset management is assuming equipment has little or no value simply because it has been replaced internally.
Replacement does not necessarily mean obsolescence.
The same XG801 card an operator removes because it needs higher density could be exactly what another broadband provider needs to:
Replace a failed card
Add capacity
Maintain compatibility
Avoid a larger network upgrade
Support an existing installed base
The same principle applies across telecom networks. Equipment may be old to your network architecture while remaining highly relevant somewhere else. Knowing the difference is where an experienced secondary-market telecom partner can create substantial value.
Have Calix XG801s or Other Surplus Telecom Equipment?
If your organization is replacing Calix XG801 cards with XG1601s, upgrading other portions of your XGS-PON network or simply has unused equipment sitting in storage, it is worth determining whether those assets still have market value. TELECOMCAULIFFE – A PICS Telecom Team can help with:
- Surplus telecom equipment purchasing
- Telecom asset recovery
- Network equipment valuation
- Decommissioning and removal
- Legacy and discontinued equipment sourcing
- Part-number and compatibility identification
- Secondary-market telecom equipment solutions
Our goal isn’t simply to buy or sell a piece of hardware. It is to understand where equipment fits within the network, why technology is changing, what can still be reused and how to extract the greatest possible value from the assets involved. If you have Calix XG801s, E7 equipment or other telecom equipment being replaced, removed or sitting unused, send us your equipment list. There may be considerably more value sitting in your network—or your warehouse—than you realize.
The TELECOMCAULIFFE Difference
TELCOMCAULIFFE, A PICS Telecom Team, is a leading global distributor of telecom products and network equipment, offering an expansive selection of new, surplus, and refreshed products from over 1000 manufacturers. When you buy from the TELCOMCAULIFFE Team you’ll experience a wide range of benefits that not all OEMs or vendors offer.
- 7 Experienced Dynamic Professionals Working to Ensure the Best Pricing, Quickest Turnaround, And Highest Quality Equipment
- Standard Lifetime Warranty with Advanced Replacement
- State-of-the-Art Test Facilities and Repair Services
- 24/7 Online Customer Service
- Dedicated Marketing Professional to Sell Your Surplus Equipment
- Follow-Up Process to Ensure Customer Satisfaction