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DPC3941B sip alg?

KSB
Visitor

DPC3941B sip alg?

Can sip alg be disabled on the DCP3941B router?
Trusted Forum Contributor

Re: DPC3941B sip alg?

Hello KSB and welcome,

 

If you are running DPC3941 Firmware Version 1.7.3 then your SIP Alg should be disabled by default.

 

Hope this helps you out.

KSB
Visitor

Re: DPC3941B sip alg?

Thank You. 

Trusted Forum Contributor

Re: DPC3941B sip alg?

There is no specific sip alg disablement parameter within the DPC39XX Comcast Gateways (CG) GUI Interface. This is default handled within the CG FW. However, if you need any related sip alg ports opened on any Routable Static IP device that facilitates VOIP SIP, you can certainly open the ports within the Advanced,True Static IP Management facility.

 

 

Wright
Visitor

Re: DPC3941B sip alg?

Can you tell me if our firmware has SIP ALG disabled?  I am not sure of the firmware version.

Our DPC3941B has a hardware revision of 1.1 and a software version dpc3941b-v303r20421753-170721a-CMCST.p7b

Can we get an upgrade of the firmware that will help our VOIP issues.

Official Employee

Re: DPC3941B sip alg?

Hi Wright and welcome to the business forums. 

 

I appreciate you reaching out about SIP ALG. SIP ALG is now disabled on all Comcast Business leased modems by default. What exactly going with your VOIP?

Wright
Visitor

Re: DPC3941B sip alg?

We are experiencing issues with our voip phones and our voip provider has recommended turning off SIP ALG as well as all NAT functions on the router.  They initially suggested bridge mode, but we have a public address block from Comcast, and cannot use bridge mode.

 

When we moved into our current location there were issues with the modem provided and they may have given us an older modem as they thought it was more reliable.

Official Employee

Re: DPC3941B sip alg?

Could you elaborate on your VOIP issues? I'll be glad to assist. 

Wright
Visitor

Re: DPC3941B sip alg?

Our main voip issue is incoming calls sometimes do not cause the ip phone to ring, but roll to a forwarded cell phone, or go directly to voice mail. Outgoing calls work fine.

Highlighted
Official Employee

Re: DPC3941B sip alg?

I would like to review for any issues that may be causing that with your internet services. If no issue is found, you may need to speak with your VOIP provider again to look into this.

 

May I please have you private message me your full name, the name of your business, the full address of your business location and the phone number associated with your business account?