IES-1248-5x/IES-1248-5xA Series

48-port Temperature-Hardened ADSL2+ Box DSLAM

A Complete Offering for High Bandwidth Asymmetrical Services - Residential Data, Voice, and Multiple Video Channels

Better utilization of bandwidth

ZyXEL IES-1248-5x/IES-1248-5xA Series (DC Power Input) is an IP-based DSLAM that terminates all the ATM circuits and converts traffic directly to deliver the most popular broadband IP services. It also provides a distinct advantage over typical ATM-based DSL access system due to the fact that IP is the natural approach for data transmission. It offers better bandwidth utilization, ease of use, as well as the low-cost advantage. With the highly compact and temperature-hardened design, simple installation and easy adaptation to local POTS/ISDN splitter requirements, the IES-1248-5x/IES-1248-5xA Series can be deployed in indoor and outdoor enclosures.

mehr Details im Überblick

A robust, capable ADSL2+ solution

With this standalone ADSL2+ IP DSLAM, service providers can offer residential and business users access to high-bandwidth services on demand; such as streaming video, online gaming, multimedia applications and multiple video channels on a single network connection. The IES-1248-5x/IES-1248-5xA Series also offers medium/small businesses and home offices IP connectivity, VPNs, VLANs, high-quality video conferencing, long-reach Ethernet and legacy service interconnection, as well as asymmetric connectivity as fast as 24Mbps. The IES-1248-5x/IES-1248-5xA Series DSL solution for POTS/ISDN is a sophisticated ADSL2+ device wielding full compliance to existing standards, the latest DSL technology, compactness, low power consumption, integration with existing platforms and network managemeability. The combination of a superior line code, modern signal processing techniques and state-of-the-art ASIC design add up to a compact, energy-saving ADSL2+ modem with excellent performance, transparent backward ADSL/ADSL2 compatibility, robust interference resistance and flexible configurability.

Technische Daten

ADSL2/ADSL2+ Interface

  • Support G.992.1 Annex A

  • Support G.992.3 Annex A, Annex L, Annex M

  • Support G.992.5 Annex A, Annex M

  • Support G.994.1 G.hs

  • Support G.992.3 and G. 992.5 ATM Transmission Convergence (ATM-TC) function

  • Support G.992.3 and G.992.5 Spectral Mask

  • Support EOC and Overhead Channel Access defined in ITU-T Rec. G.992.3 and ITU-T Rec. G.997.1

  • Support the latency path function specified in ITU-T Rec. G.992.3 and G.992.5

  • Support loop diagnostic function specified in ITU-T Rec. G.992.3 and G.992.5

  • Support the power management capability specified in ITU-T Rec. G.992.3 and G.992.5

  • Support the capability of the Seamless Rate Adaptation (SRA) on-line configuration specified in ITU-T Rec. G.992.3 and G.992.5

  • SELT and DELT

Network Interface

  • IEEE 802.3u 100BASE-TX

  • IEEE 802.3ab 1000BASE-T

  • IEEE 802.3z 1000BASE-LX/1000BASE-SX

  • SFP mini GBIC

ATM Functionality

  • Support Point-to-Point Virtual Circuit Connection (VCC) in the Network

  • Provide the Peak Cell Rate (PCR) configurable parameter for UBR services specified in ATM Forum Traffic Management 4.0

  • Provide the Peak Cell Rate configurable parameter for CBR services specified in ATM Forum Traffic Management 4.0

  • Provide the Peak Cell Rate (PCR) and Sustainable Cell Rate (SCR) configurable parameters for rt-VBR and nrt-VBR services specified in ATM Forum Traffic Management 4.0

  • The over-subscription of bandwidth is permitted, i.e., total DSL bandwidth can be larger than bandwidth of DSLAM network interface for UBR service

  • Support the downstream traffic shaping function for each ATM PVC connection

  • Support the Fault Management (FM) functions of the ATM layer F5 OAM cells for End-to-End Loopback defined in ITU-T Rec. I.610

  • 8 PVC per port

  • Support upstream rate limiting per PVC

  • Support G.998.1 ADSL 2-port bonding

IP Functionality

  • Support ICMP (Internet Control Message Protocol) function, and respond the ICMP request message sent from NMS or other system

  • IP bridging

Subscriber Management

  • Support the Ethernet MAC filtering function

  • Support 14k MAC addresses

  • Support the DHCP relay agent option 82 function

  • Support 802.1x

  • Support port isolation function

  • Support RFC2684 bridged mode payload encapsulation method

  • Support the IPSec/L2TP/PPTP VPN pass-through function

  • Support RFC2516 PPPoE packet forwarding function

  • Support configurable MTU (1526~1600 bytes)

  • Support TR-101 compliant PPPoE intermediate agent

  • Support DHCP option 82 feature per port or per VLAN

  • Support DHCP snooping and static IP address feature

  • Support TR-101 compliant DHCP option 82 packet format

VLAN & VLAN Bridge Functions

  • Provide 1024 configurable VLANs

  • The VLAN tagging complies with IEEE 802.1Q

  • Support VLAN bridge function of mapping of multiple PVCs to one VLAN ID

  • Support the IEEE 802.1Q VLAN tagging

  • Support GVRP function

  • Support per-VLAN isolation

  • Support OUI filter function


  • Support 802.1w RSTP


  • Support configurable IEEE 802.1p priority queue function and support 4 levels

  • Support configurable mapping function between ATM PVC and 802.1p priority queue

Multicast capability for IP network interface

  • Support RFC2684 bridged mode multicast service

  • Support Internet Group Management Protocol (IGMP) version 2 specified in RFC2236

  • Support IGMP snooping function

  • Support 512 multicast groups

  • Support 50 members for each multicast group

  • Support IGMP v3 packet recognition

  • Support multicast group filter function


  • Local management through a craft terminal

  • Support the In-band IP interface for managing the Network

  • Support SNMP (Simple Network Management Protocol) v1.0 & v2c (RFC1157)

  • The management activities can be performed by SNMP operations

  • Support SNMP MIB(s)

  • Support standard SNMP traps so that these traps can be reported to other NMSs

  • Centralized Management Software – EMS supporting

Hardware Configuration

  • Two TELCO-50 connectors for 48-port ADSL/ADSL2/ADSL2+

  • Two TELCO-50 connectors for 48-port splitter card

  • One mini RJ11 console port for local management

  • Two 100Base-TX/1000Base-T or two mini GBIC for uplink/subtending

  • One DB9 for 3 in and 1 out alarm contact

  • Hot-swappable fan module

  • DC Input connector

Power Requirements

  • Voltage: -48 VDC (-36 ~ -72VDC)

  • Power: max. 90Watts

Physical Specifications

  • 19” and 23” Rack-mountable

  • Force cooling by FAN

  • Temperature hardening

  • Built-in splitter

  • Dimension: 442.7 (W) x 250 (D) x 66 (H)mm (17.3” x 9.88” x 2.6”)

  • Weight: 7.2 Kg (15.87lb)

Environmental Specifications

  • Operating Temperature: -40°C to 65°C (-40°F to 149°F)

  • Storage Temperature: -40°C to 85°C (-40°F to 185°F)

  • Operating Humidity: 10% to 95% (non-condensing)

  • Storage Humidity: 5% to 95% (non-condensing)


  • EMC/ESD: FCC part 15 Class A; EN 55022, EN 55024 Class A; ETS 300 386

  • Safety: ITU-T K.20, Appendix C; CSA 60950; EN 60950; IEC 60950 ; UL 60950

  • Reliability : ETS 300 019

  • NEBS Complian

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