Current Status: Compatible

Recommendation: Suitable for 1-3 phones

Comments: There are no known issues with this router although it is best used for smaller offices (1-3 phones). This device is not believed to offer QoS which may be a drawback in certain deployments.

Current Status: Recommended

Comments: This is a business-grade multifunction router, including Gigabit Ethernet, VPN and Wireless-N capabilities. We deploy this unit on a regular basis and are able to recommend it for a range of small to medium business needs.

This unit offers four Ethernet ports; consider adding an unmanaged switch if you require more ports.

Current Status: Compatible

Recommendation: Recommended

Comments: Suitable for small office of 2-5 phones

Current Status: Compatible

Recommendation: Recommended

Comments:

Current Status: Compatible

Recommendation: Recommended

Comments:

Current Status: Compatible

Recommendation: Recommended

Comments: This family of routers is recommended for use with our VoIP services and appears compatible with the most recent firmware revision. The MTU settings under 'Setup' -> 'Network' should be set to 1500 (Cable) or 1492 (DSL). The RV series offer an excellent QoS feature which is an advantage over most competing routers.

If you have a large number of devices to connect to your router, the 4-port RV042 may not offer enough ports for you. In this case, choose the RV082 or RV016 for their larger number of ports, or alternatively purchase an unmanaged switch and connect it to your RV042 to increase its port capacity.

Current Status: Compatible

Recommendation: Recommended

Comments: This is an excellent router with all the features of the RV-series routers (above) that also offers Wireless-N connectivity and Gigabit Ethernet speeds. The router has four ports; if more are required we recommend connecting an unmanaged switch to the WRVS4400N.

Current Status: Compatible

Recommendation: Suitable for 1-2 Phones

Comments: There are no known issues with this model router at present. The router does not offer QoS, but this may not be a major issue in offices with only one or two employees. We would not recommend this router for larger-scale deployments.

Current Status: Compatible

Recommendation: Recommended for 1-2 phones

Comments:

This router is compatible and recommended for 1-2 sip phones. Appears to have problems with 3 or more SIP phones caused by NAT issues. Use DDWRT firmware instead in this case if hardware revision allows for this.

Current Status: Compatible

Recommendation: Suitable for 1-3 Phones

Comments: There are no known issues with this router. This router has no QoS (Quality of Service) which is a drawback if you are using it in an environment where there are computers or other non-VoIP equipment. We would not recommend this device for larger-scale office deployments.

Current Status: Compatible

Recommendation: Disable SIP ALG

Comments: We recommend customers set enable 'Consistent NAT' (check the box) and disable 'SIP Transformations' (uncheck the box). Ensure that the MTU is set correctly for your ISP.

Select the Firewall Settings -> Edit LAN>WAN Rule -> Advanced

TCP Connection Inactivity Timeout (minutes) to 60

UDP Connection Inactivity Timeout (seconds) to 3600

Select the Firewall -> Access Rules and add a new rule with the following:

Action: Allow

Service: Any

Source: WAN, Address Range[see engineering dept]

Destination: LAN, Address Range * to *

Comment: Easy Office Phone D1

If there is an option for 'Allow Fragmented Packets' then please enable this option.

TCP Connection Inactivity Timeout (minutes) to 60

UDP Connection Inactivity Timeout (seconds) to 3600

Select the Firewall -> Access Rules and add another new rule with the following:

Action: Allow

Service: Any

Source: WAN, Address Range [see engineering dept]

Destination: LAN, Address Range * to *

Comment: Easy Office Phone D2

If there is an option for 'Allow Fragmented Packets' then please enable this option.

TCP Connection Inactivity Timeout (minutes) to 60

UDP Connection Inactivity Timeout (seconds) to 3600

Current Status: Possibly compatible after Changes

Recommendation: Disable SIP ALG or Bridge to Supported Router

Comments: To use this router you need to login to the web interface for the router and disable the 'SIP ALG' setting on it. If this option is not available you will need to bridge the router to a compatible router so that the 2wire router acts as a simple modem rather than a router.

If bridging is not possible either, you must replace this device as it will prevent you from using our service.

Current Status: Compatible; may require changes

Recommendation: Confirm model with Easy Office Phone

Comments: The Cisco routers we have encountered appear to be quality devices that are compatible with our service, but may require some changes.

Cisco 837: The router's NAT service for SIP should be disabled, with the command:

no ip nat service sip udp port 5060

Current Status: Compatible after Changes, Hardware Revision B Only

Recommendation: Disable SIP ALG

Comments:

This applies to Hardware Revision B only. Other hardware revisions are not compatible with VoIP as they do not have the disable SIP ALG option.

This router has known issues with VoIP services if SIP ALG is not disabled. We recommend disabling the SIP ALG setting on the router available in firmware releases 2.2.4 and higher. This option is available within the firewall settings under the 'Application Level Gateway (ALG) Configuration'. The SIP option should be unchecked.

Current Status: Possibly Compatible after Changes

Recommendation: Disable SIP ALG

Comments:

We recommend disabling SIP ALG through the DIR-625's web interface. After the change, this router appears to be compatible and able to serve up to three or four phones. Customers who have tried to connect a larger number of phones to this router have found that the additional phones fail to register with our server. We would not recommend this router for a larger-scale deployment as it does not appear to perform reliably.

Current Status: Compatible after Changes, Hardware Revision B Only

Recommendation: Disable SIP ALG

Comments:

This applies to Hardware Revision B only. Other hardware revisions are not compatible with VoIP as they do not have the disable SIP ALG option.

This router has known issues with VoIP services if SIP ALG is not disabled. We recommend disabling the SIP ALG setting on the router available in firmware releases 2.2.4 and higher. This option is available within the firewall settings under the 'Application Level Gateway (ALG) Configuration. The SIP option should be unchecked.

Current Status: Compatible after Changes

Recommendation: Disable SIP ALG

Comments:

In the CLI of the fortigate type the following:

config system settings

set sip-helper disable

set sip-nat-trace disable

Reboot the device

In the CLI type the following:

Config system session-helper

show

(now look for SIP, mostly it will be "12")

delete 12

Don't use any protection profiles on the firewall of the sip rules.

Current Status: Compatible after Changes

Recommendation: Disable SIP ALG

Comments: You must disable the SIP ALG on the Netscreen router. Navigate to the 'Configuration' page and choose 'Advanced'. Then choose ALG and un-check the SIP check box.

Current Status: Compatible after changes

Recommendation: Disable SIP ALG and ensure appropriate firmware is running

Comments: The following changes/checks are required:

1) Must be running firmware v3.3 or higher

2) Must have SIP ALG disabled.

Current Status: Compatible after Changes

Recommendation: Update firmware and disable SIP ALG

Comments:

This router is known to cause issues related to storing configuration and failed firmware downloads with Aastra and Grandstream series phones. Aastra phones on this router require frequent reprogramming and firmware replacement. This router appears to work with VoIP services with the SIP ALG setting is disabled. The router does not work properly with VoIP with the SIP ALG setting enabled (which is enabled by default). You should make sure you have the most recent firmware for this router before using it. To disable the SIP ALG, first login to your router and select 'Rules' from the left hand side menu. Next, check the box that says 'Disable SIP ALG'.

Current Status: Possibly compatible after changes

Recommendation: Disable SIP ALG or replace device

Comments:

Netopia has SIP Passthrough "on" by default and will not work with VoIP services properly unless SIP ALG is disabled. (Or SIP ALG in newer models) In order to work with voice-over-IP, you must turn SIP Passthrough (SIP ALG) off. Note that not all Netopia routers may allow this change; if yours does not you must replace the device with a compatible router in order to use our service.

The SIP ALG setting is not in the web gui. You have to telnet into the router, then type. Each line is a new command.

configure

set ip sip-passthrough off

save

exit

Restart

On the Netopia 4622xlt

Telnet into the device

Use the arrow keys to highlight 'quick menu' and press "ctrl-n"

That brings you to the console.

type:

ip nat alg sip enable no

save

exit

restart

Current Status: Possibly compatible after changes

Recommendation: Bridge device to supported router

Comments: This router is not compatible with VoIP services unless it is bridged. We recommend bridging the router to alternative router so that it acts as a modem only.

Current Status: Possibly compatible after changes

Recommendation: Adjust router settings

Comments: We have encountered a scenario in which a router running the Tomato firmware would only let one phone register at a time. We were able to resolve this problem by entering the router settings, under 'Advanced' and then 'Conntrack/Netfilter', where we enabled the SIP option for 'Tracking/NAT Helpers.' The router on which this was encountered was an Asus RT N16 but this issue and resolution may apply for other routers running Tomato.

Current Status: Possibly compatible after changes

Recommendation: Disable SIP ALG or bridge device to router

Comments:

This router is not compatible with VoIP services without modifications. We recommend either bridging the device to another router or disabling the SIP ALG. To disable the SIP ALG you must first telnet into the router/modem. Choose (24) System Maintenance and (8) Command Interpreter Mode. From the command line type:

ip nat service sip active 0

You will receive the message "SIP ALG Disable"

Current Status: Not Compatible

Recommendation: Replace device

Comments:

This router is not SIP Compatible. Drops calls after 20 seconds.

Current Status: Not Compatible

Recommendation: Replace device

Comments:

This router is not SIP Compatible. It has no SIP ALG or SIP Fixup options and does not work with polycom, aastra or cisco phones.

Current Status: Not Compatible

Recommendation: Replace device

Comments:

This router is not compatible with VoIP services. We cannot support this router in any way and it must be replaced before using our service.

Current Status: Not Compatible

Recommendation: Replace Device

Comments:

This router is not compatible with VoIP.

Current Status: Not Compatible

Recommendation: Replace Device

Comments: This router is not compatible with VoIP applications as it lacks an option to disable the internal SIP ALG which interferes with IP Telephones.

Current Status: Not 100% Compatible

Recommendation: Replace Device or Replace Firmware

Comments: This router is not recommended for use with VoIP services using the stock firmware from Linksys. This model router is known to damage and modify SIP packets in such a way that it prevents VoIP packets from being formatted correctly and can cause a multitude of problems.

Current Status: Not Compatible

Recommendation: Replace Device

Comments:

This router is not compatible with VoIP services. There is no method to disable the internal SIP ALG on device. Other customers have found that bridging the device to a compatible router did not result in a workaround. We recommend replacing this device with a compatible modem and router.

Current Status: Not Compatible

Recommendation: Replace Device

Comments:

This router is not recommended for use with VoIP services. This router causes issues related to storing configuration and failed firmware downloads with Aastra and Grandstream  series phones. The router appears to work some of the time but lacks the ability to disable the SIP ALG which causes intermittent issues with phone service. If possible we would recommend avoiding this router until Netgear makes it possible to disable the internal SIP ALG setting on the router to be compatible with voice-over-IP.

Current Status: Not Compatible

Recommendation: Replace Device

Comments:

This router lacks the ability to disable SIP ALG and is not compatible with VoIP services.

Current Status: Not Compatible

Recommendation: Replace Device

Comments:

This router lacks the ability to disable SIP ALG and is not compatible with VoIP services.

Current Status: Not Compatible

Recommendation: Replace Device

Comments:

Most SMC routers do not appear to be compatible with VoIP services. We would suggest that you either replace this router with a compatible one or attempt to bridge it to another router.