What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
A central office switch is a telecommunications switching system that connects telephone lines and trunk circuits so calls can begin, end, or pass through the public switched telephone network (PSTN). It may serve end users, route traffic between other switches, or perform both roles. The term refers to switching equipment; “central office” can also mean the building that houses it.
What a central office switch does
The switch makes network connections among lines and trunks. Depending on its role, it can connect a caller’s line to the network, connect a call to its destination, or pass traffic between other switches. A U.S. interconnection agreement defines a central office as a local switching system that connects lines to lines, lines to trunks, or trunks to trunks for calls over the PSTN. The agreement’s definitions also describe central-office-switch equipment used to provide telecommunications services.
End-office switch vs. tandem switch
The distinction is the network connections each role handles: an end office serves exchange lines and end users, while a tandem switch connects trunk circuits between switches.
Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minute| Role | What it connects | What the role means |
|---|---|---|
| End office or end-office switch | End-user exchange service and the network | The user-facing switching role. Federal regulation defines an end office as “the telephone company office from which the end user receives exchange service.” 47 CFR § 69.2 |
| Tandem office or tandem switch | Trunk circuits among central-office switches | The intermediary trunk-switching role, described in a Florida Public Service Commission order. |
| Combination switch | Both end-user exchange service and trunks between switches | A single switch may perform both end-office and tandem functions, as described in the interconnection agreement. |
These are network roles, not a guarantee that each role occupies a separate building. The definitions do not establish one physical layout or identify which technologies a particular carrier currently uses.
#1 Best Overall
- 𝗢𝗻𝗲 𝗦𝘄𝗶𝘁𝗰𝗵 𝗠𝗮𝗱𝗲 𝘁𝗼 𝗘𝘅𝗽𝗮𝗻𝗱 𝗡𝗲𝘁𝘄𝗼𝗿𝗸: 5× 10/100/1000Mbps RJ45 Ports supporting Auto Negotiation and Auto MDI/MDIX.
- 𝗚𝗶𝗴𝗮𝗯𝗶𝘁 𝘁𝗵𝗮𝘁 𝗦𝗮𝘃𝗲𝘀 𝗘𝗻𝗲𝗿𝗴𝘆: Latest innovative energy-efficient technology greatly expands your network capacity with much less power consumption and helps save money.
- 𝗥𝗲𝗹𝗶𝗮𝗯𝗹𝗲 𝗮𝗻𝗱 𝗤𝘂𝗶𝗲𝘁: IEEE 802.3X flow control provides reliable data transfer and Fanless design ensures quiet operation.
- 𝗣𝗹𝘂𝗴 𝗮𝗻𝗱 𝗣𝗹𝗮𝘆: Easy setup with no software installation or configuration needed.
- 𝗔𝗱𝘃𝗮𝗻𝗰𝗲𝗱 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗙𝗲𝗮𝘁𝘂𝗿𝗲𝘀: Prioritize your traffic and guarantee high quality of video or voice data transmission with Port-based 802.1p/DSCP QoS and IGMP Snooping.
Central office switch vs. central office building
“Central office” is sometimes used for the telephone-company building where switching systems and related equipment are installed. “Central office switch” is more precise when you mean the switching system itself. The distinction matters in technical descriptions: a building may house switching equipment, but the building is not the switching function.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to read the term in context
- If a description says the equipment serves subscribers’ exchange lines, it is referring to the end-office role.
- If it says the equipment switches trunks between central offices, it is referring to the tandem role.
- If it says “central office” without “switch,” check whether the passage means the network facility or the switching system.
Definitions vary by document and regulatory context. The cited agreement and Florida order use the term for switching functions and distinguish end-office and tandem roles; the federal rule cited here defines “end office,” rather than specifying every possible central-office-switch configuration.
Quick Recap
Best Value
- Telephone Cable with Switch:Telephone cable with an on/off button switch, you can easily disconnect the telephone set by just pressing the switch without unplugging, avoiding many nuisance calls and giving you a quiet rest time.(Note: Please use a full 6-core telephone line, make sure the first core is connected for the switch function to work properly.)
- Easy to Use:Simple, easy to install, protects the port of the telephone to avoid constant plugging and unplugging. When you don't want to be disturbed, you can easily turn off the telephone set, making life easier and simpler
- Quality Material:Using environmentally friendly PVC sheath and shielded copper wire, exquisite workmanship, accurate signal transmission, providing a good and solid connection without signal loss
- Compatible Devices:For data/voice applications. Universally compatible with all RJ12 devices, such as landline, fax or answering machine
- Usage Scenario:Home, study, living room, bedroom, office, business meeting, education, entertainment, etc
Rank #4
- New generic 2 Ports RJ11 RJ12 Manual Sharing Switch Box, Hot-swappable (no need to reboot computer)
- 6P6C female connector, 2 manual switch buttons
- 2 Ports RJ11 RJ12 Switch Box
- High quality rotary switch,No power required No additional software needed Easy to use and install
- Cable not included**
Rank #3
- GIGABIT ETHERNET PORTS: Features 8 x 1.0Gbps Ethernet ports for high-speed connectivity. Auto-negotiating ports detect the optimal speed for connected devices and work with existing Cat5e or Cat6 Ethernet cables.
- PLUG-AND-PLAY UNMANAGED NETWORK SWITCH: Simple plug-and-play setup with no software to install or configuration required.
- FLEXIBLE MOUNTING OPTIONS: Compact metal design supports desktop or wall-mount placement for versatile installation.
- SILENT & ENERGY-EFFICIENT OPERATION: Fanless design ensures silent performance, while IEEE 802.3az Energy Efficient Ethernet reduces power consumption without compromising high-speed network performance.
- REGIONAL COMPATIBILITY: Made for use in U.S. & CA only
Rank #2
- GIGABIT ETHERNET PORTS: Features 5 x 1.0Gbps Ethernet ports for high-speed connectivity. Auto-negotiating ports detect the optimal speed for connected devices and work with existing Cat5e or Cat6 Ethernet cables.
- PLUG-AND-PLAY UNMANAGED NETWORK SWITCH: Simple plug-and-play setup with no software to install or configuration required.
- FLEXIBLE MOUNTING OPTIONS: Compact metal design supports desktop or wall-mount placement for versatile installation.
- SILENT & ENERGY-EFFICIENT OPERATION: Fanless design ensures silent performance, while IEEE 802.3az Energy Efficient Ethernet reduces power consumption without compromising high-speed network performance.
- REGIONAL COMPATIBILITY: Made for use in U.S. & CA only
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
