Dialogic® I-Gate® 4000 Mobile Backhaul Session Bandwidth Optimizers

I-Gate 4000 SBO Backhaul

The Dialogic® I-Gate® 4000 Mobile Backhaul Session Bandwidth Optimizers (I-Gate 4000 MB SBO and I-Gate 4000 MBX SBO) are standalone systems that can optimize bandwidth and increase bandwidth capacity significantly in the backhaul segments of both 2G and 3G mobile networks. Because they optimize Abis and Iub data streams, including both ATM and IP-based Iub streams, the I-Gate 4000 MB or MBX SBO can provide a cost-effective and efficient strategy for increasing backhaul capacity, translating to significantly reduced capital and operation expenses.

I-Gate 4000 MB and MBX SBOs can also accept native IP and VoIP streams and transmit the combined optimized stream over TDM and/or IP. Along with Abis and Iub optimization, the I-Gate 4000 MB and MBX SBOs leverage statistical multiplexing and grooming techniques developed by Dialogic that have been shown in field trials to typically double the capacity of backhaul links while preserving the quality and integrity of the original data traffic through Quality of Service (QoS) protection techniques.


Features   Benefits
Leverage special bandwidth and IP packet rate optimization technologies developed by Dialogic, while preserving the quality and integrity of the original data traffic Enables cost-effective optimization and increased capacity for mobile backhaul segments in 2G and 3G mobile networks
Each uses unparalleled bandwidth optimization algorithms and techniques to optimize mobile backhaul data sessions Reduces backhaul bandwidth usage by up to 50% without degrading original data sessions as shown in field trials
Both combine high-quality payload optimization and QoS protection techniques Can deliver substantial CAPEX and OPEX savings in 2G and 3G mobile backhaul segments
Each supports multiple topologies, such as point to point, point to multi-point, drop and continue, data offload, and ring Works with a wide range of mobile backhaul designs and topologies for effective optimization
GUI-based management system with runtime reports showing traffic mix, comparative bandwidth, and QoS behavior Enables ease of operation and supplies a snapshot of important statistics on demand
Supports wide range of transmission infrastructure Can be used in terrestrial, radio link and satellite installations and over TDM or Ethernet links
99.9995% (five-nines) availability through a fully redundant 1 RU platform Provides high reliability in a small footprint at the hardware, software, and network levels



Technical Specifications

Traffic Handling  
Abis Traffic Optimization
  • Idle Channel Suppression
  • Silence Removal
  • HDLC flag removal
  • TRAU frame optimization
  • VAD enhancing optimization
  • Extended GPRS/EDGE optimization
  • Supported TRAU frames: FR (13 kbps), EFR (12.2 kbps), HR (5.6 kbps), AMR (4.75/12.2 kbps) codecs, FR data, HR data, Extended data, O&M frames
Iub-over-ATM Traffic Optimization
  • ATM layer header optimization
  • Idle cell removal
  • AAL header optimization (AAL2 and AAL5) 
Iub-over-IP Traffic Optimization
  • Iub Header optimization and aggregation for all protocol layers from Layer 2 up to and including RLC
Abis-over-IP (Packetized Abis), Native IP and VoIP Optimization
  • Headers optimization and Packet aggregation
  • Statistical multiplexing
  • Over IP network or PSN (using Gigabit/Fast Ethernet ports) — IP-GRE
  • Over TDM network 
  • Combined IP and TDM networks
Auto Detection
  • Automatic TRX allocation detection for Abis traffic and AAL for the ATM-based Iub traffic
Payload Aggregation
  • Statistical multiplexing among all types of traffic
Traffic Congestion Control
  • Payload Priority Selection (PPS) mechanism for Abis
  • Tail Drop
  • DCAM
Embedded Cross-Connect
  • Any-to-Any trunk DS0 channel for all configured DS0s
Pseudo-Wire Emulation Edge-to-Edge (PWE3)
  • SAToP (Structure-Agnostic TDM over Packet ) — RFC 4553
  • CESoPSN (Circuit Emulation Service over Packet-Switched Network) — RFC5086
QoS Management
  • Multiple queues management
  • IP packet classification and marking
  • Multiple congestion avoidance
  • Scheduling and Shaping
  • Policing
  • H-Qos
QoS Protection
  • Tail Drop mechanism
  • Payload Priority Selection mechanisms
Jitter Buffer
  • Adaptive
Silence Suppression (for Abis traffic)
  • GSM-AMR, GSM 06.94
Traffic Links
  • Supports: terrestrial links, microwave links, and satellite links
  • Over GRE (Generic Routing Encapsulation)
  • Up to 16 GRE tunnels
Network Interfaces

Gigabit Ethernet Ports


  • Complies with IEEE 802.3z (optical)
  • Complies with IEEE 802.3ab (electrical)
  • SFP-Optical SM (1310nm) or MM (850nm)
  • RJ45 (electrical)
  • IEEE 802.1q
  • Up to 32 VLANs
E1 Interfaces  
Electrical Characteristics
  • Complies with ITU-T Recommendation G.703
  • 120Ω balanced
Frame Structure
  • Complies with ITU-T Recommendation G.704
Line Code
  • HDB3
CRC-4 and E Bit Use
  • Configurable
Return Loss
  • Complies with ITU-T Recommendation G.703 paragraph 6.3.3 and with ETSI ETS 300166
  • ITU G.703, G.813, G.825, G.783, G.957 and Telcordia GR-253
STM-1 Frame    
  •  ITU G.707
Line Code
  • NRZ (optical)
  • CMI (electrical) 
STM-1 Payload    
  • 63 E1 (AU4) or 3x21 E1 (AU3)
Fiber optic coupling
  • Single Mode (1310 nm)
IP Protocols 


  • SNMP v2 (RFC 1907) (for runtime configuration, status, alarm notification and operator actions)
  • FTP (RFC 959) (for software and map download/upload)
IP version    
  • IPv4
Quality of Service
  • TOS marking (operator configurable)
  • 802.1p 
Time Protocol    
  • SNTP (RFC 2030 v4)
  • Static
  • MAC learning 
  • Supports Virtual Loopback Interface
Redundancy and High Availability


Main Module 
  • 1:1 MPTM, MPTH, or MPTI redundancy
  • 1:1 MPSX or HPTM redundancy
Power Supply
  • 1:1 DCPS redundancy
  • Load sharing
Power Feed
  • 2 independent power feed connections through main and redundant DCPS
Fan Tray
  • 6 fans
  • Support for Fan Turbo mode 
Ethernet Link Protection
  • 1:1 mode 
  • 99.9995 % (five-nines) 
Additional High Availability Features
  • Hitless Hot module swapping — Hot extractions/insertions of modules
  • Hitless Hot Software upgrade — Non-traffic effecting
  • Runtime configuration
Temperature Control
  • Built-in temperature sensors
  • Fan Turbo mode
  • Alarms: High & Extreme High Temperature
System Synchronization


Clock Standards
  • IEEE 1588v2
  • SyncE
Clock Source
  • Two clock sources can be standard TDM input bitstreams of any
    configured TDM interface.
  • Two clock sources can be SyncE input of any configured Ethernet ports.
  • PTP clock can be configured as clock source in addition to TDM and SyncE sources in terminal configured PTP Mode = Slave (PTP VLAN does not support BVI).
  • In case of failure of all clock sources, Hold-Over on the last synchronized external clock source is performed (with an accuracy of ±1 PPB per 24 hours).
  • Internal clock with accuracy of Stratum 3Ecc


DC Power Input
  • -48 VDC / -60 VDC (nominal)
  • -40.5 VDC / -72 VDC  (min/max)
Max DC current    
  •  7A
Max DC power consumption    
  •  284W
Physical Characteristics


Dimensions for I-Gate 4000 SB0-MB
  • Width: 435 mm (17.1 in) — not including mounting brackets
  • Height: 44.45 mm (1.75 in — 1U)
  • Depth: 448 mm (17.6 in)
Dimensions for I-Gate 4000 SB0-MBX
  • Width: 435 mm (17.1 in) — not including mounting brackets
  • Height: 44.45 mm (1.75 in — 1U)
  • Depth: 450 mm (17.6 in)
  • Can be installed in 19-inch or 23-inch cabinets or relay racks, or as wall mount, or on top of any rigid infrastructure (desktop).

Data Sheets


Case Study

Technology Brief

Use the Purchase page linked below to find partners to purchase Dialogic products. The order codes below are for your reference when making a purchase.

Where to Buy