VOIP Tips

Asahi Net IP Phone C

Asahi Net offer a VOIP service called "IP Phone C". This service is parts of the 050 VOIP network in Japan, with calls trunked by NTT. This service is compatible with third party SIP clients, but Asahi Net provides no configuration support.

The supplied information is:

Translating this into SIP terminology:

Why do they invent non standard terminology?

Rport Issue

Asahi Net's service actually uses SIP servers operated by a company called OCN. Unfortunately, their SIP implementation rejects messages with the "rport" parameter set in the "Via" header. This is a problem because many other implementations include "rport" by default. Sometimes, it cannot be disabled, meaning you cannot interoperate with OCN.

Yate

Yate is a telephony engine that can talk many protocols.

SIP Registration

In accfile.conf place a stanza like this:

[asahi_net]
enabled=yes
protocol=sip
description=asahi_net
username=user_id
domain=asahi-net.or.jp
authname=auth_id
password=auth_password
server=voipXX.nc.asahi-net.or.jp
interval=600
keepalive=15 ;use if behind stateful firewall to keep flow open
xsip_flags=1 ;use if your server refuses messages with rport

Cisco 504g Handset

On a Cisco 504g there is no explicit setting for the SIP authentication realm. The solution is to configure "proxy" with the authentication realm, and "outbound proxy" with the SIP proxy. Note that this device sets the "rport" parameter and will not interoperate with OCN SIP servers.

PaddonWiki: VoipTips (last edited 2015-11-10 08:03:42 by mwp)