Hello Tracker1,

02 May 23 00:22, you wrote to Blue White:

So voip.ms works well with modems? Some VOIP providers do not
work so well, especially at higher speeds (2400 or 9600+). Also
if you have a voip service, what is the Cisco hardware for?

Some voip providers offer support for "Fax" service, in the case of
voip.ms you have to request it... usually this means you should be
able to get 9600-14.4 give or take without much issue. You should do
some testing and configure your modem not to negotiate at higher than
14.4 or 19.2k connections.

The cisco box connects to a VOIP line over ethernet/internet and will provide line service for a POTS device (such as a standard modem).

which codec do you recommend for modem communications?

Regards,
--
dp

telnet://bbs.roonsbbs.hu:1212 <<=-

... Uptime: 2d 17h 26m 33s
--- GoldED/2 1.1.4.7+EMX
* Origin: Roon's BBS - Budapest, HUNGARY (21:4/148)

Roon wrote (2023-05-04):

Hello Tracker1,

02 May 23 00:22, you wrote to Blue White:

So voip.ms works well with modems? Some VOIP providers do not
work so well, especially at higher speeds (2400 or 9600+). Also
if you have a voip service, what is the Cisco hardware for?

Some voip providers offer support for "Fax" service, in the case of
voip.ms you have to request it... usually this means you should be
able to get 9600-14.4 give or take without much issue. You should do
some testing and configure your modem not to negotiate at higher than
14.4 or 19.2k connections.

The cisco box connects to a VOIP line over ethernet/internet and will
provide line service for a POTS device (such as a standard modem).

which codec do you recommend for modem communications?

G.711 aka ulaw / alaw. It's the same codec that ISDN uses and that was used when POTS moved from analog to digital infrastructure.

⁂

---
* Origin: This site requires JavaScript (21:3/102)

On 27 Apr 2023, Warpslide said the following...

I'm using voip.ms with a Cisco SPA112 ATA. The ATA is connected to a USR Sportster 56k modem which is connected to a USB to serial adapter.

* Cisco phone adapters vulnerable to RCE attacks, no fix available *

Cisco has disclosed a vulnerability in the web-based management interface of Cisco SPA112 2-Port Phone Adapters, allowing an unauthenticated, remote attacker to execute arbitrary code on the devices.

Tracked as CVE-2023-20126 and having a "critical" CVSS score of 9.8, this vulnerability is caused by a missing authentication process within the firmware upgrade function.
[...]
While these adapters may be used in many organizations, they are likely not exposed to the Internet, making these flaws mostly exploitable from the local network.
[...]
Since Cisco SPA112 has reached the end of its life, it is no longer supported by the vendor and will not receive a security update. Also, Cisco has provided no mitigations for CVE-2023-20136.

https://www.bleepingcomputer.com/news/security/cisco-phone-adapters-vulnerable- to-rce-attacks-no-fix-available/



Always fun to know. Luckily mine isn't exposed to the open internet.


Jay

... A gathering of optometrists is called a focus group

--- Mystic BBS v1.12 A49 2023/04/30 (Linux/64)
* Origin: Northern Realms (21:3/110)

which codec do you recommend for modem communications?

Not sure, been better part of a couple decades since the last time I played with a modem or fax over a voip service...


--
Michael J. Ryan
+o roughneckbbs.com
tracker1@roughneckbbs.com
--- SBBSecho 3.15-Linux
* Origin: Roughneck BBS - roughneckbbs.com (21:3/149)