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Bad Voice quality

santiago_figueroa
Level 4
Level 4

‎07-09-2009 10:23 PM - edited ‎03-15-2019 06:54 PM

We had the following connection:

IPHone--Gw--WAN--GW(PSTN)-CCM

For outgoing call from IP Phone to PSTN , the ipphone heard very good but the PSTN heard very bad. The calls is connected in g729r8.

The calls iphone--CCM--GW---WAN---GW---Ipphone is g729 and the both heard very good.

anyone can help me?

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3 Replies 3

KonradStepniewski
Level 3
Level 3

‎07-10-2009 02:29 AM

Did you try to use G711 with calls to PSTN?

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santiago_figueroa
Level 4
Level 4
In response to KonradStepniewski

‎07-10-2009 07:48 AM

Yes, I made the test and I don't work

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husali
Cisco Employee
Cisco Employee
In response to santiago_figueroa

‎08-18-2010 11:36 PM

How are you connected to the PSTN? PRI, CAS, E1 R2, or FXO?

When you say bad voice quality, what exactly is the symptom? Choppy audio, echo, static, etc.The following document has samples of various bad audio quality symptoms and they can help you identify exactly what are you experiencing.

Recognizing and Categorizing Symptoms of Voice Quality Problems.

http://www.cisco.com/en/US/tech/tk652/tk698/technologies_white_paper09186a00801545e4.shtml



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