1. MSAP Specification (Preliminary) August 2007 NexComm

2. Overall Specification 4U size, Short Depth (under 245mm) 4U size, Short Depth (under 245mm) -48V Dual Input -48V Dual Input Temperature-sensitive FAN Control Temperature-sensitive FAN Control Telco Connectors at Rear-side Telco Connectors at Rear-side 1:1 Media Converter or Traffic Aggregation 1:1 Media Converter or Traffic Aggregation Traffic Aggregation Traffic Aggregation 2 GigE Uplink Ports 2 GigE Uplink Ports 1 x 10/100/1000BASE-T 1 x 10/100/1000BASE-T 1 x SFP (100/1000BASE-X) 1 x SFP (100/1000BASE-X) Various kind of Line Modules Various kind of Line Modules Single-point Management Single-point Management

3. Front Side Controller Module Line Modules Air Holes Line Modules

4. Rear & Bottom Side FAN Modules Telco Connectors -48V Dual Input & Earth Ground Ventilation Hole

5. Modules Chassis Chassis 4U size, 19” Rack-Mountable 4U size, 19” Rack-Mountable -48V Dual Input -48V Dual Input Temperature-sensitive FAN Control Temperature-sensitive FAN Control Telco Connectors (3 x RJ-21) at Rear-Side Telco Connectors (3 x RJ-21) at Rear-Side Control & Switching Module (CSM) Control & Switching Module (CSM) G.bis EFM Module (EFMC2/4) G.bis EFM Module (EFMC2/4) Fiber Optic EFM Module (EFMFX) Fiber Optic EFM Module (EFMFX) Circuit Emulation Module (CEM) Circuit Emulation Module (CEM)

6. Control & Switching Module (CSM) Uplink Uplink 1 x 10/100/1000BASE-T 1 x 10/100/1000BASE-T 1 x SFP (LC type): 100/1000BASE-X 1 x SFP (LC type): 100/1000BASE-X 802.3ad (Link Aggregation) 802.3ad (Link Aggregation) Bridging Bridging 8K MAC Addresses 8K MAC Addresses MAC Filtering MAC Filtering IEEE 802.3x (Flow Control) IEEE 802.3x (Flow Control) IEEE 802.3ad (Link Aggregation) IEEE 802.3ad (Link Aggregation) IEEE 802.1x* (MAC Authentication) IEEE 802.1x* (MAC Authentication) IEEE 802.1d* (Spanning Tree Protocol) IEEE 802.1d* (Spanning Tree Protocol) IEEE 802.1w* (Rapid Spanning Tree Protocol) IEEE 802.1w* (Rapid Spanning Tree Protocol) IEEE 802.1s* (Per-VLAN Spanning Tree Protocol) IEEE 802.1s* (Per-VLAN Spanning Tree Protocol) * Please contact your customer support

7. Control & Switching Module (CSM) VLAN VLAN Port-based VLAN Port-based VLAN Tag-based VLAN (IEEE 802.1Q) Tag-based VLAN (IEEE 802.1Q) 4096 VLAN Group 4096 VLAN Group VLAN Stacking (Q-in-Q) VLAN Stacking (Q-in-Q) QoS QoS Classification by Port, 802.1p, and DSCP Classification by Port, 802.1p, and DSCP 4-level priority Queues 4-level priority Queues Strict & Simple WFQ Scheduling Strict & Simple WFQ Scheduling Ingress/Egress Rate Limit Ingress/Egress Rate Limit

8. Control & Switching Module (CSM) Management Management CLI, Telnet, HTTP and SNMP CLI, Telnet, HTTP and SNMP FTP, TFTP for Remote Upgrade FTP, TFTP for Remote Upgrade Various kind of Shell Scripts Various kind of Shell Scripts Miscellaneous Miscellaneous Time Synchronization (SNTP) Time Synchronization (SNTP) Logging System (Syslog) Logging System (Syslog) Dual System Image for redundancy Dual System Image for redundancy Automatic Line Module Configuration Automatic Line Module Configuration Automatic Remote CPE Upgrade Automatic Remote CPE Upgrade

9. G.Bis EFM Module (EFMC2/4) Subscriber Subscriber IEEE 802.3ah (Ethernet in the First Mile) IEEE 802.3ah (Ethernet in the First Mile) G.bis EFM 2/4 channel (Max. 22.8 Mbps) G.bis EFM 2/4 channel (Max. 22.8 Mbps) 64/65o Encoding 64/65o Encoding PHY Aggregation Function (PAF: EFM Bonding) PHY Aggregation Function (PAF: EFM Bonding) Uplink Uplink 2 x 10/100BASE-T Interfaces 2 x 10/100BASE-T Interfaces 1 x Media Converter Port (RJ-45) 1 x Media Converter Port (RJ-45) 1 x Traffic Aggregation Port (Backplane) 1 x Traffic Aggregation Port (Backplane) Transparent Bridging Transparent Bridging Strict Priority and WFQ Strict Priority and WFQ 4-level Priority 4-level Priority Various kinds of Frame Filter for Security Various kinds of Frame Filter for Security

10. Fiber Optic EFM Module (EFMFX) Subscriber Subscriber 100BASE-FX 100BASE-FX 100BASE-L/BX 100BASE-L/BX Uplink Uplink 2 x 10/100BASE-T Interfaces 2 x 10/100BASE-T Interfaces 1 x Media Converter Port (RJ-45) 1 x Media Converter Port (RJ-45) 1 x Traffic Aggregation Port (Backplane) 1 x Traffic Aggregation Port (Backplane) Transparent Bridging Transparent Bridging Strict Priority and WFQ Strict Priority and WFQ 4-level Priority 4-level Priority Various kinds of Frame Filter for Security Various kinds of Frame Filter for Security

11. Circuit Emulation Module (CEM) Subscriber Subscriber 4/2 x E1 (G.703/G.704) 4/2 x E1 (G.703/G.704) Uplink Uplink 4/2 x E1 (G.703/G.704) 4/2 x E1 (G.703/G.704) 10/100BASE-T Interfaces (Backplane) 10/100BASE-T Interfaces (Backplane) Circuit Emulation Service over PSN (CESoP) Circuit Emulation Service over PSN (CESoP) Structure Agnostic Transport over PSN (SAToP) Structure Agnostic Transport over PSN (SAToP) Y.1413, IETF PWE3 and IA of MEF 8 Y.1413, IETF PWE3 and IA of MEF 8 Timing & Synchronization Recovery Timing & Synchronization Recovery 2G/3G Backhaul Service 2G/3G Backhaul Service TDM Leased-line Service over Packet Network TDM Leased-line Service over Packet Network Nx64 Grooming Service Nx64 Grooming Service