Airmux-200 Update for August 2007

Airmux 200 Slide 2 Agenda Symmetrical vs. Asymmetrical transmission HE HSS feature IDU-R 8 port PoE Wrap-up

Airmux 200 Slide 3 Asymmetrical vs. Symmetrical Most TDD radios transmit and receive in a “demand-based” mode If there is more data to send, then they spend a longer time sending If there is more data to receive they spend a longer interval receiving. Good on paper—not good for certain applications—voice and video Airmux is completely symmetrical Equal time sending and receiving every time

Airmux 200 Slide 4 Airmux 200-Voice and Video Designed to transmit T1 traffic All transmission is symmetrical Standard, unframed E1/T1, compliant with ITU-T standards BER < 1x10 sensitivity threshold Accurate clock recovery mechanism (0.05 PPM) Advanced clock configurations Patented ARQ fast retransmission

Airmux 200 Slide 5 New- HE ODU High power (up to 23 dBm) Available in 5.8 GHz Supports Synchronized Co-located Units- HSS 4 x the transmit power Higher link quality & reliability Best for areas with high RF interference

Airmux 200 Slide 6 Collocation Challenges When multiple radios are installed in close proximity, sources of interference are multiplied: Frequency Interference: Collocated units use the same and adjacent frequencies Transmit/Receive Interference: Units transmit at the time that other units try to receive

Airmux 200 Slide 7 Airmux Hub Site Synchronization Unique burst synchronization technique Synchronizes Tx and Rx timing for all units at a hub site Eliminates collocation TDD interference Support mixture of 20, 10, 5 MHz Channels Enables multi point-to-point architecture

Airmux 200 Slide 8 HSS Basic Architecture (topology)  All collocated units are synchronized using a shared sync pulse  The sync pulse is generated by a Hub Sync Master (HSM) ODU and distributed through sync cables and HSS unit to Hub Sync Client (HSC) ODUs  A Hub Sync Client can be configured in two ways:  Hub Sync Client – Continue Transmission: In the event that the unit loses synchronization with the Hub Sync Master, the link remains active. However, without synchronization pulses, it is possible that this unit will cause interference.  Hub Sync Client – Disable Transmission: In the event that the unit loses synchronization with the Hub Sync Master, the link is dropped until the synchronization pulses resume. This setting prevents the unit from causing interference.  The remote ODUs that are not located at the hub site, are called Independent Units and do not require HSS hardware.

Airmux 200 Slide 9 Hub Site Synchronization (HSS) Supporting up to 16 collocated units Requires HSS Unit, HSSU-10, and Sync cables Supported products: For all ODU High End (ODU-HE) and All- Indoor (AIND) products

Airmux 200 Slide 10 HSSU-10 Passive CLK distribution unit (no power feeding) Full outdoor installation, typically on a pole next to the ODU’s Cable connects between HSSU- 10 and ODU-HE

Airmux 200 Slide 11 HSS Configuration MasterClient

Airmux 200 Slide 12 Point-to-Multipoint vs. Multi Point- to-Point M-PtP (RADWIN)PtMP Guaranteed BW per userShared Bandwidth 3msec30-100msec Delay Strictly supportedLimited QoS Longer (directional antenna) Limited (sectorial antenna) Range Full flexibility. Each user gets the required service (Ethernet, E1/T1s or a mix) with the relevant channel BW No flexibility. Ethernet only, same channel BW to all users Mixed services No single point of failureLimited Robustness Low, linear CAPEXMedium-High Entry Cost

Airmux 200 Slide 13 Applications – Enterprise Connectivity

Airmux 200 Slide 14 Applications – WiFi Backhaul

Airmux 200 Slide 15 Applications – Video Surveillance

Airmux 200 Slide 16 Typical Applications Airmux-200 (HE): 8 x E1 Airmux-200 (HE): 1 + 1: TDM support Airmux-200 (HE): 1 + 1: Ethernet support Airmux-200 (HE): Link Aggregation Acc. to 802.3af Airmux-200 using IDU-R: TDM Back-Up Application 1+1 Airmux-200– Applications (continue)

Airmux 200 Slide 17 Highlights High Availability ≥ % (back-up) High Capacity (Link Aggregation) Installation Guidelines Master/Slave Collocated site is synchronized – HSS (Hub Site Sync) feature Alternate / Adjacent channels can be used 1+1 With Airmux Applications

Airmux 200 Slide 18 Airmux-200 (HE): 8 x E1 IDU ODU IDU-C HSS Cable Sync Bipolar antenna is optional Collocated site is synchronized – HSS (Hub Site Sync) feature Alternate / Adjacent channels can be used Bipolar antenna is optional Collocated site is synchronized – HSS (Hub Site Sync) feature Alternate / Adjacent channels can be used

Airmux 200 Slide 19 Airmux-200 (HE): 1 + 1: TDM support IDU ODU Site A Site B Site C Options: Site B = Site C or Site B ≠ Site C External TDM Switch is required based on BER ≤ 1e-6 switching

Airmux 200 Slide 20 Airmux-200 (HE): 1 + 1: Ethernet support IDU ODU Options: Site B = Site C or Site B ≠ Site C Switching is based on external switch supporting Spanning Tree (ST) feature for redundancy Reference – Cisco and 3COM Spanning Tree supported switches Site A Site B Site C

Airmux 200 Slide 21 Airmux-200 (HE): Link Aggregation Acc. to 802.3ad (LACP) IDU ODU Options: Site B = Site C or Site B ≠ Site C Aggregation is based on external switch supporting “link aggregation Protocol” 802.3ad Reference – Cisco LACP supported switches Enables to multiple capacity n x 18Mbps (net throughput) Site A Site B

Airmux 200 Slide 22 IDU-R New IDU that provides backup link for E1/T1 connections Maintains fully operation link at all times In case of failure or primary connection, automatically switches to backup (14uS) The air-interface can be defined as primary or backup link Operates with all WinLink 1000 outdoor units portfolio Ordering Options: WL1000-IDU-R-E1 and WL1000-IDU-R-T1

Airmux 200 Slide 23 New PoE-8 Feeds up to 8 ODUs from a single unit instead of using 8 separate PoE devices Supports both AC and DC (-20 to -60V) Indoor Unit

Airmux 200 Slide 24 Summary Symmetrical superior to Asymmetrical transmission HE radios offer more power and stability HSS offers new flexibility for co-location HSS also introduces 1+1 back-up HSS supports link aggregation for higher speed IDU-R can support T1 back-up and 1+1 redundancy PoE 8 affords space-saving convenience and cost reduction over stand alone solutions

Airmux 200 Slide 25 For your attention Thank You Toll Free (USA): International: