Reliability
Reliability when sending voice bearer over IP
The following are supported with the S8700 Media Server when sending voice bearer over IP:
- Duplex reliability
- High reliability
Duplex Reliability when sending voice bearer over IP
The S8700 Media Server is duplicated. Tone-Clock functionality is provided by the IPSI circuit pack in each PN. As an all-IP solution, only IP-connected port networks are supported.
The duplex-reliability option is the most basic option. A duplex-reliability configuration consists of the following:
- Two S8700 Media Servers
- One Ethernet switch
- One UPS unit for each S8700 Media Server. The use of two UPS units ensures that a single UPS failure or repair operation will not disable the system.
- One IPSI in each IPSI-connected port network.
See Figure 5, Duplex-reliability configuration when sending voice bearer over IP, for an example of a duplex-reliability configuration when sending voice bearer over IP.
Figure 5: Duplex-reliability configuration when sending voice bearer over IP
Figure notes
| Number |
Description of Connection |
| 1 & 2 |
S8700 Media Server pair. One in a active mode and the other on standby. |
| 3 |
Duplication Links: The Ethernet connection default Ethernet 2 and the fiber link |
| 4 |
A dedicated Ethernet connection to a laptop. This connection is active only during on-site administration or maintenance and the services interface can link to the standby server through a telnet session. |
| 5 |
Connection from the servers to the Ethernet switch. |
| 6 |
Ethernet Switch - A device that provides port multiplication on a LAN by creating more than one network segment. In an IP-Connect environment, the Ethernet switch should support 802.1 ip/Q, VLAN and 10-/100-Mbps. |
| 7 |
Two UPS units |
| 8 |
Port Network - An optional configuration of Media Gateways that provides increased port capacity. |
| 9 |
IPSI - A circuit pack that transports control messages over IP. This IPSI circuit pack is used so the S8700 Media Server can communicate with the PNs. |
| 10 |
Customer LAN |
| 11 |
Control Lan Interface (C-LAN) - A circuit pack that provides call control for every IP endpoint that is connected to the media server using an Avaya media gateway. |
High reliability when sending voice bearer over IP
The high-reliability configuration option builds on the duplex-reliability option. The high-reliability option duplicates components so that no single point of failure exists in the control network. The high-reliability configuration consists of the following:
- Two S8700 Media Servers
- Two Ethernet switches (on customer's network)
- Two UPS units
- Two IPSI circuit packs in each IPSI-connected port network
See Figure 6, High-reliability when sending voice bearer over IP, for an example of a high-reliability configuration when sending voice bearer over IP.
Figure 6: High-reliability when sending voice bearer over IP
Figure notes
| Number |
Description of Connection |
| 1 & 2 |
S8700 Media Server pair. One in a active mode and the other on standby. |
| 3 |
Duplication Links: The Ethernet connection default Ethernet 2 and the fiber link |
| 4 |
A dedicated Ethernet connection to a laptop. This connection is active only during on-site administration or maintenance and the services interface can link to the standby server through a telnet session. |
| 5 |
Connection from the servers to the Ethernet switch. |
| 6 |
Ethernet Switch - A device that provides port multiplication on a LAN by creating more than one network segment. In an IP-Connect environment, the Ethernet switch should support 802.1 ip/Q, VLAN and 10-/100-Mbps. |
| 7 |
Two UPS units |
| 8 |
Port Network - An optional configuration of Media Gateways that provides increased port capacity. |
| 9 |
IPSI - A circuit pack that transports control messages over IP. This IPSI circuit pack is used so the S8700 Media Server can communicate with the PNs. |
| 10 |
Customer LAN |
| 11 |
Control Lan Interface (C-LAN) - A circuit pack that provides call control for every IP endpoint that is connected to the media server using an Avaya media gateway. |
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