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lists at darl.com
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 Posted: Fri May 30, 2008 11:38 am Post subject: [asterisk-users] CDMA Phones |
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Robor Oghene wrote:
| Quote: | Hi,
Do CDMA phones use the gsm codec?
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Nope.
CDMA uses the EVRC codec, which is better at filtering out background
noise than the GSM codec. EVRC sounds better than that farty sounding
codec CDMA used to use, which again wasn't the same as GSM.
-Ron |
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joakimsen at gmail.com
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| Posted: Fri May 30, 2008 11:44 am Post subject: [asterisk-users] CDMA Phones |
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NO!
See: http://en.wikipedia.org/wiki/EVRC
On Fri, May 30, 2008 at 11:21 AM, Robor Oghene <oghenerobor at gmail.com> wrote:
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steveu at coppice.org
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| Posted: Fri May 30, 2008 2:03 pm Post subject: [asterisk-users] CDMA Phones |
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Robor Oghene wrote:
| Quote: | Hi,
Do CDMA phones use the gsm codec?
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Even GSM phones rarely use the GSM 06.10 codec that is in Asterisk these
days. CDMA never did.
Steve |
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jarruda-asterisk at ja...
Guest
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| Posted: Fri May 30, 2008 2:10 pm Post subject: [asterisk-users] CDMA Phones |
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Steve Underwood wrote:
| Quote: | Robor Oghene wrote:
| Quote: | Hi,
Do CDMA phones use the gsm codec?
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Even GSM phones rarely use the GSM 06.10 codec that is in Asterisk these
days. CDMA never did.
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Isn't AMR supposed to be the codec used in GSM nowadays ? I remember
seeing something like this in Nortel PVG/Packet Trunking for GSM,
AMR/AMR-HR or something like that. |
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steveu at coppice.org
Guest
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| Posted: Fri May 30, 2008 2:34 pm Post subject: [asterisk-users] CDMA Phones |
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Julio Arruda wrote:
| Quote: | Steve Underwood wrote:
| Quote: | Robor Oghene wrote:
| Quote: | Hi,
Do CDMA phones use the gsm codec?
|
Even GSM phones rarely use the GSM 06.10 codec that is in Asterisk these
days. CDMA never did.
|
Isn't AMR supposed to be the codec used in GSM nowadays ? I remember
seeing something like this in Nortel PVG/Packet Trunking for GSM,
AMR/AMR-HR or something like that.
|
AMR can be used with 2G GSM, but is most commonly used with 3G UMTS
(along with AMR-WB, the wide band version). The commonest codecs for GSM
are the EFR (enhanced full rate) and HR (half rate) codecs.
Steve |
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joakimsen at gmail.com
Guest
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| Posted: Sat May 31, 2008 2:06 pm Post subject: [asterisk-users] CDMA Phones |
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ulaw... it would be as if they were calling themselves over the PSTN.
Not ideal but it works. don't try something like g723!
On Sat, May 31, 2008 at 2:53 PM, Robor Oghene <oghenerobor at gmail.com> wrote:
| Quote: | Thanks for your response
Which of the codecs supported on asterisk is best for GSM and CDMA phones
connecting over sip?
On Fri, May 30, 2008 at 8:34 PM, Steve Underwood <steveu at coppice.org> wrote:
| Quote: |
Julio Arruda wrote:
| Quote: | Steve Underwood wrote:
| Quote: | Robor Oghene wrote:
| Quote: | Hi,
Do CDMA phones use the gsm codec?
|
Even GSM phones rarely use the GSM 06.10 codec that is in Asterisk
these
days. CDMA never did.
|
Isn't AMR supposed to be the codec used in GSM nowadays ? I remember
seeing something like this in Nortel PVG/Packet Trunking for GSM,
AMR/AMR-HR or something like that.
|
AMR can be used with 2G GSM, but is most commonly used with 3G UMTS
(along with AMR-WB, the wide band version). The commonest codecs for GSM
are the EFR (enhanced full rate) and HR (half rate) codecs.
Steve
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_______________________________________________
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eric at fnords.org
Guest
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| Posted: Sat May 31, 2008 4:36 pm Post subject: [asterisk-users] CDMA Phones |
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ulaw or alaw.
Robor Oghene wrote:
| Quote: | Thanks for your response
*Which of the codecs supported on asterisk is best for GSM and CDMA phones
connecting over sip?*
On Fri, May 30, 2008 at 8:34 PM, Steve Underwood <steveu at coppice.org> wrote:
| Quote: | Julio Arruda wrote:
| Quote: | Steve Underwood wrote:
| Quote: | Robor Oghene wrote:
| Quote: | Hi,
Do CDMA phones use the gsm codec?
|
Even GSM phones rarely use the GSM 06.10 codec that is in Asterisk these
days. CDMA never did.
|
Isn't AMR supposed to be the codec used in GSM nowadays ? I remember
seeing something like this in Nortel PVG/Packet Trunking for GSM,
AMR/AMR-HR or something like that.
|
AMR can be used with 2G GSM, but is most commonly used with 3G UMTS
(along with AMR-WB, the wide band version). The commonest codecs for GSM
are the EFR (enhanced full rate) and HR (half rate) codecs.
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Consulting for Asterisk, Polycom, Sangoma, Digium, Cisco, LAN, WAN, QoS,
T-1, PRI, Frame Relay, Linux, and network design. Based near
Birmingham, AL. Now accepting clients worldwide. |
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