EMP & Lightning Home Surge Protection
EMP - Click Here!
Global Test Supply
Linked Banner to your Product or Website
eCommerce website for sale!
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Jun 2021
Posts: 2
OP Offline
Joined: Jun 2021
Posts: 2

We have a Mikrotik hEX RB750Gr3 5-port Ethernet Gigabit Router, with RouterOS 6.48.2.

We're located in Canada.

We had a new Panasonic VoIP PBX (NS700) in house installed by a firm that does just that, 6 months ago.
All the port forwarding were set in the Mikrotik router according to their specifications.
Since then we have the following trouble:
It's always the same person who answer the calls of the business. 2 to 5 times a day, when she answers, she cannot hear the customer and the customer cannot hear her. She hangs up, the customer calls back and it always work the second time. Usually no one has trouble doing outgoing calls.

Any Ideas how we could locate the problem with this?

Global Test Supply 728x90
Joined: Oct 2007
Posts: 300
C5Z Offline
Joined: Oct 2007
Posts: 300
Download a SIP ALG port tester and run it on a PC on your network to test the router. You want SIP ALG False/Disabled for UDP.

Instructions are just one man's opinion on paper
Joined: Jun 2021
Posts: 2
OP Offline
Joined: Jun 2021
Posts: 2
Hi C5Z,

Yeah the SIP ALG is turned off in the router. I also had used a tester on a PC to confirm it.

Since many week the phone is working great. The person answering the phone said it was almost flawless. Just sometimes, when she answers, the other person already hung up. But that could be just that.

I don't know if it helped, but I had change a few rules in the firewall. I had like 12 rules or so to block Inter-LANs traffic. It could be summarized to 1 rule that did the same job. So one rule to replace 12.
Also I had added QoS, prioritizing the phone traffic.

It might all have played in our favor.


Moderated by  Carl Navarro, OBT 

Link Copied to Clipboard
Advertising Sponsor
Popular Topics (Views)
Forum Statistics
Most Online5,661
May 23rd, 2018
Today's Birthdays
junkman, Tom J.
Newest Members
NZAndy101, spunkysam, tn00247167, Dave McCann, Mitel Hotel
49,496 Registered Users
Get Tech Support Now! Click the banner below
Get Tech Support Now!
Top Posters (30 Days)
dexman 10
Toner 6
Advertising Sponsor Spot 2
EMP Shield for Commercial - Home & Vehicle
Use Coupon code SAVE - Click Here!
Who's Online Now
23 members (pdxjim911, RATHER BE FISHING, hitechcomm, Yoda, Silversam, JBean3329, Tip&Ring, Carl Navarro, justbill, BCmitel, nfcphoneman, Ironhedz, Professor Shadow, nortelvoip, mongo5150, OBT, Ruben, sundance, Ben Holmes, EV607797, gelehu, Touch Tone Tommy, vicbob), 524 guests, and 48 robots.
Key: Admin, Global Mod, Mod
Contact Us | Telephone System Tech Support | Terms of Service

Sundance Communications is not affiliated with any of the above manufacturers.
©Copyright Sundance Communications 1998-2021
Trusted Partners
landing page builder Antiransomware 300x250 Your Business Phone Service in the Cloud