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Review: Sipura SPA-2100 Analog Telephone Adapter


The 2100's user interface won't win any design awards, and I found it a little confusing until I got the hang of it. There are two privilege levels - User (the default) and Admin - and Basic and Advanced settings levels within each privilege. Figures 4 and 5 show the User and Admin views respectively of the Advanced WAN settings so that you can get an idea of the differences.

Figure 4: User level Advanced WAN settings
(click image to enlarge)

You can see that both User and Admin levels allow setting changes. The difference is in what each level is allowed to change.

Figure 5: Admin level Advanced WAN settings
(click image to enlarge)

The routing portion of the 2100 is pretty basic, although it has some features such as QoS and 802.1P VLAN tagging not typically found on basic routers. It handles static, DHCP and PPPoE WAN types and includes WAN MAC cloning capability. You can also put a client in DMZ and set port forwarding for 20 port ranges (TCP, UDP or both protocols).

But you'll find that firewall features are somewhat limited. There are no parental controls or even outgoing port filtering options and the QoS features don't allow you to limit the bandwidth allocated to specific applications or users.

Table 1 shows that routing performance is well matched to the limitations of the 2100's 10Mbps WAN and LAN ports. It also is fast enough for broadband speeds typically provided to most U.S. users.

Firmware Version:2.0.5(d)

Of particular note is the excellent UDP streaming performance (0% data loss at 1Mbps stream rate), which tells me that the Sipura designers understand what job #1 as far as the 2100's router is concerned! Note that the missing LAN-WAN UDP streaming results are not the 2100's fault, but due to Qcheck's inability to handle this test on some NAT+SPI routers.