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What is DSLAM?
DSLAM (Digital Subscriber Line Access Multiplexer) is a digital subscriber line access multiplexer or concentrator, which is a network device typically used in a telecommunications company (such as TT in Turkey) as a central system mechanism to provide DSL connections to multiple customers/subscribers over a single high-speed ATM line.
DSLAM collects signals from multiple DSL subscribers and transmits them over a high-speed backbone line using multiplexer technology. When the DSLAM receives a DSL signal, it recognizes voice and data through a POTS splitter and an ADSL modem; voice is sent to the PSTN and data to the DSLAM, which then goes to the Internet via ATM. Responses to subscribers also come back through DSLAM and ADSL via ATM.
VDSL modems connect to DSLAMs capable of generating VDSL signals, with VDSL DSLAMs using the EFM (Ethernet in First Mile) protocol as a layer two protocol. Due to the higher frequencies used in VDSL technology, it can provide services over shorter distances compared to ADSL, but can take advantage of much higher bandwidths. Speeds of up to 100 Mb/s can be achieved within a range of 200 meters. FTTB, FTTC, FTTx applications are the most suitable solutions for VDSL. FTTB can be implemented with 8-port VDSL DSLAMs, while FTTC can be implemented with DSLAMs having more ports. To learn more about VDSL and VDSL2, you can read the article 'What is VDSL and VDSL2'.
Depending on the product used, DSLAM multiplexers connect to DSL lines with some asynchronous transfer mode (ATM) connections.
DSLAM recommends DSL as the fastest telephone line technology and ATM as the fastest backbone network technology to telecommunications companies.
More DSLAMs for a telecommunications company mean more subscribers.
Speed limits based on distances:
- 25 Mbit/s at 1,000 feet (~300 m)
- 24 Mbit/s at 2,000 feet (~600 m)
- 23 Mbit/s at 3,000 feet (~900 m)
- 22 Mbit/s at 4,000 feet (~1.2 km)
- 21 Mbit/s at 5,000 feet (~1.5 km or ~0.95 miles)
- 19 Mbit/s at 6,000 feet (~1.8 km or ~1.14 miles)
- 16 Mbit/s at 7,000 feet (~2.1 km or ~1.33 miles)
- 1.5 Mbit/s at 15,000 feet (4.5 km or ~2.8 miles)
- 800 kbit/s at 17,000 feet (~5.2 km or ~3.2 miles)
DSLAM (Digital Subscriber Line Access Multiplexer) is a digital subscriber line access multiplexer or concentrator, which is a network device typically used in a telecommunications company (such as TT in Turkey) as a central system mechanism to provide DSL connections to multiple customers/subscribers over a single high-speed ATM line.
DSLAM collects signals from multiple DSL subscribers and transmits them over a high-speed backbone line using multiplexer technology. When the DSLAM receives a DSL signal, it recognizes voice and data through a POTS splitter and an ADSL modem; voice is sent to the PSTN and data to the DSLAM, which then goes to the Internet via ATM. Responses to subscribers also come back through DSLAM and ADSL via ATM.
VDSL modems connect to DSLAMs capable of generating VDSL signals, with VDSL DSLAMs using the EFM (Ethernet in First Mile) protocol as a layer two protocol. Due to the higher frequencies used in VDSL technology, it can provide services over shorter distances compared to ADSL, but can take advantage of much higher bandwidths. Speeds of up to 100 Mb/s can be achieved within a range of 200 meters. FTTB, FTTC, FTTx applications are the most suitable solutions for VDSL. FTTB can be implemented with 8-port VDSL DSLAMs, while FTTC can be implemented with DSLAMs having more ports. To learn more about VDSL and VDSL2, you can read the article 'What is VDSL and VDSL2'.
Depending on the product used, DSLAM multiplexers connect to DSL lines with some asynchronous transfer mode (ATM) connections.
DSLAM recommends DSL as the fastest telephone line technology and ATM as the fastest backbone network technology to telecommunications companies.
More DSLAMs for a telecommunications company mean more subscribers.
Speed limits based on distances:
- 25 Mbit/s at 1,000 feet (~300 m)
- 24 Mbit/s at 2,000 feet (~600 m)
- 23 Mbit/s at 3,000 feet (~900 m)
- 22 Mbit/s at 4,000 feet (~1.2 km)
- 21 Mbit/s at 5,000 feet (~1.5 km or ~0.95 miles)
- 19 Mbit/s at 6,000 feet (~1.8 km or ~1.14 miles)
- 16 Mbit/s at 7,000 feet (~2.1 km or ~1.33 miles)
- 1.5 Mbit/s at 15,000 feet (4.5 km or ~2.8 miles)
- 800 kbit/s at 17,000 feet (~5.2 km or ~3.2 miles)