IP Telephony and Phones

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14400 fax speed limit using modem passthrough on VG204XM and 2921 voice router

Hello, I am attempting to achieve faster faxing, while also allowing credit card machines (modem based) to work using the same equipment and configuration. Fax passthrough, T.38, etc seems to break the credit card machines. Modem passthrough works fo...

CUCM Publisher Migration

We are planning to migrate our CUCM Publisher from our main site to a new location; the new location already has a 1Gbps link to our main site.  We are running CUCM 8.6.2a and have a 5 node cluster with 2 subscribers in each location; all CUCM server...

Analog PSTN Lines

HiI have 3 Analog PSTN Lines with 3 different No., and Line one is primary No. which publish to customers and have Auto-Attend but the problem i faced is when someone call Line one, and get another call on same Line be busy How I can let second call ...

Toss Leey by Beginner
  • 2 replies
  • 0 Helpful votes

pcm_tx vs. pcm_rx

Hello, I've captured PCM stream off an FXO port I'm having voice quality issues with and the process creates two files. The files name formats are hostname_pcm.pcm_rx_0_1_0 and hostname_pcm.pcm_tx_0_1_0. When I play the files back the rx file seems t...