Best way to transport SIP voice traffic

RouterOS General
1

Hi

Can anyone give me suggestions on the best way to transport SIP voice traffic over an adsl pppoe dial up from 1 mikrotik router to another.

it basically in this topology:

(client phones)<–> {Mikrotik router} ↔ [adsl modem] — *internet — {mikrotik router} ↔ (voice server)

Thanks
Shaun

2

Do you have NAT on the routers?
If yes I would suggest to go through the document,
http://www.voip-info.org/wiki/view/Asterisk+SIP+NAT+solutions

3

thanks for the reply. I do understand what they are explaining on that web page but what i was looking for was a preffered technique to transport sip voice traffic. ie would it be better to transport the vioce traffic through a eoip tunnel or pptp or l2tp. or would it be beneficial to implement the packing optionthrough a eoip interface?

I basically want to know if there is a preferred metod to transport sip voice data between 2 mikrotik devices. :wink:

4

would ovpn be better to transport sip voice traffic than pptp or l2tp.

5

basically all im looking for is advice on what the most reliable and efficient solution is to transport sip voice traffic between 2 mikrotik routers over ADSL pppoe.

:slight_smile:

6

For reliability you would want a tunnel based on TCP, so something like pptp would work.

For efficiency you would want something based on UDP, so in that case L2TP/IPSec would work.

Each will have advantages and disadvantages, so it’s up to you which to choose.

7

would there be a benefit to create an eoip tunnel and configure the ip packer over the tunnel ?

8

IP packing requires additional processing, which is going to increase latency. Latency is paramount of VoIP.

9

I have found that in simple situations the following is very helpful.
http://wiki.mikrotik.com/wiki/TransparentTrafficShaper
mark your sip traffic any way you want, by IP or port then give it all the bandwidth and highest priority.