The Data Connect
5248A-DSG 48-Port ADSL2+ DSLAM-SFP


The Data Connect 5248A-DSG is a 48-Port ADSL/ADSL2/ADSL2+ mini IP DSLAM which equips with combo electrical (RJ-45) and fiber optical (SFP) uplink interfaces offering scalable and easy deployment for the network with small ADSL environment. With the built-in POTS splitter subscriber ports, the DCE 5248A-DSG performs a cost-effective solution for service providers to offer multiple subscribers excellent services.

Moreover, Data Connect 5248A-DSG supports local and remote managed capabilities of CLI, SNMP, and Telnet via RS-232 console port and Web GUI management interface. Via user-friendly Web GUI, the DCE 5248A-DSG can be managed by workstations running standard web browsers that provide the easy-to-use operation and convenient maintenance.

To enhance the network security, the Data Connect 5248A-DSG also provides features such as QoS, VLAN, Multicast, Bandwidth Management, Traffic Prioritization, and Access Control List. With the advanced QoS features, the DCE 5248A-DSG is an ideal solution for next generation broadband network to deliver rich video contents, DSL, POTS, VoIP service over ADSL2+ connection.


Perfect Solution for NSP (Network Service Provider) to offer broadband services The Data Connect 5248A-DSG offers the benefit of high performance to central office co-location and MTU (Multi-Tenant Unit) / MDU (Multi-Dwelling Unit) markets. IT provides service of broadband data over existing copper wires without affecting the conventional voice service by 48 subscriber ports with built-in POTS splitter. The Data Connect IP DSLAM is the perfect solution for NSP with cost-effective and high-value central Management capability.




  • 48-Port ADSL / ADSL2 / ADSL2+ Subscriber Interface with Built-in POTS Splitter
  • DMT data rate: Downstream up to 25Mbps / Upstream up to 3Mbps
  • 2 x 100Base-T or 2 x. min-GbE Uplink Interfaces
  • Web-based GUI Management
  • Local RS-232 CLI and Ethernet SNMP / Telnet / SSH / Management
  • Firmware Upgradeable via FTP
  • Configuration Backup and Restoration via TFTP
  • Supports IPSec / L2TP / PPTP VPN Pass-through
  • Supports 4K MAC address
  • Supports IEEE 802.1q Tag-based VLAN and Protocol-based VLAN
  • Layer 2 / 3 Filtering Based on MAC / IP / Protocol / Port number and Ether Type
  • Access Control List by MAC / IP / Protocol / Port number
  • Traffic prioritization (802.1p)
  • Support IGMP Snooping / Proxy per IGMP v1, v2, and v3
  • FAN Alarm Indicating
  • Temperature Monitoring and System Overheating Trap Functionality
  • Support IEEE 802.1d Spanning Tree Protocol and IEEE 802.3ad Link Aggregation


DCE 5248A-DSG / DCE 5248A-DSG-48VDC

Hardware Specification

1.5U high box-type with rack-mountable enclosure

Uplink: 2 x RJ-45 (10/100/1000Base-T), 2 x SFP (1000Base-T/SX/LX/EX/ZX/LHX
MGMT: 1 x RJ-45 (10/100Base-TX)
Console: 1 x RJ-45 (RS-232 serial port, 9600, 8, N, 1)
Line: 2 x RJ-21 connectors
Phone: 2 x RJ-21 connectors
Fan: 2 x RJ-45
HK: 1 x RJ-50

LED Indicator
2 x Uplink LEDs
48 x ADSL LEDs

Software Specification

Compliant with ADSL standard
– ANSI T1.413 issue 2
– G.dmt (ITU G.992.1)
– G.lite (ITU G.992.2)
– G.hs (ITU G.994.1)
Capable of ADSL2 standard a
– G.dmt.bis (ITU G.992.3)
Capable of ADSL2+ standard
– G.dmt.bisplus (ITU G.992.5)

– Subscriber interface with built-in POTS splitter
– Downstream DMT data rate up to 25Mbps
– Upstream DMT data rate up to 3Mbps (Annex M)
– Distance up to 18kft
– 8 PVCs per x DSL port
– DHCP forward
– DHCP relay agent
– PPPoE relay
– IPSec / L2TP / PPTP VPN pass-through function
– PPPoA to PPPoE inter-working

Bridge Function
– Supports IPv4 packet
– Supports IEEE802.1d Ethernet bridge function between trunk Ether port and ATM VCs
– Supports static source MAC table provisioning, automatic source MAC learning block duplicate ones
– Support 4K static MAC address table
– 128 MAC address per x DSL port
– Supports IEEE802.1d Ethernet bridge function between trunk Ether port and ATM VCs
– Supports Rapid Spanning Tree Protocol (RSTP) for the trunk interfaces per IEEE 802.1w
– Supports Link Aggregation in IEEE 802.3ad for 2 GBE links to be aggregated together as logical link
– Support both LACP protocol (dynamic) for load sharing and failover in case of loss of Ethernet link

VLAN Function
– IEEE 802.1q Port-based / Protocol-based VLAN
– 512 non-stacked VLAN-D simultaneously ranging from 1 to 4095
– VLAN stacking and VLAN cross-connect
– IP Spoofing prevention
– MAC anti-Spoofing
– Port isolation functionally
– Static VLAN group and membership provisioning

Multicast Function
– IP multicast forwarding
– Complies with RFC2684 bridged play load encapsulation mode
– Up to 256 multicast groups and 512 copies simultaneously
– Up to 48 profile-based Multicast Access Control
– Limit maximum number of IGMP group joined per bridge port
– IGMP snooping / proxy per IGMP v1, v2, and v3
– IGMP proxy and IGMP snooping Selection

– Supports layer-2 frame filtering based on MAC and Ether Type
– Supports layer-3 filtering based on IP, Protocol, and Port number
– IEEE 802.1x authentication

– Control the bandwidth occupied by broadcast, multicast, and unknown unicast (flooding)
– Rate-limit profile binding and 512 copies simultaneously
– Three Color Marketing (TCM) policer
– Ethernet rate limit per bridge port
– ToS (type of service) / DiffServ (differentiated services) stripped and priority queuing
– DSCP mapping to 802.1q
– Selectable adopted priority queue mechanism according to Strict Priority Queue (SPQ) and Weighted Fair Queue (WFQ)
– Configurable mapping function between ATM PVC and 802.1p priority queue
– Support IP CoS technology

– Web based GUI management
– Local RS-232 CLI, and Ethernet SNMP / Telnet / SSH management
– Remote in-band SNMP / Telnet / SSH management
– Firmware upgradeable via FTP
– SNMP v1, v2c

Ordering Information

DCE 5248A-DSG                       48-Port ADSL2/2+ IP DSLAM (2 x GbE Combo, 100~240V AC)
DCE 5248A-DSG-48VDC        48-Port ADSL2/2+ IP DSLAM (2 x GbE Combo, -48VDC)