Maximum number of fax calls at the same time

[rivera]

We have an IAD model 912 (2nd Gen) with 10 fax lines configured, we are having intermittent fax issue and we like to know if there is constraint in maximum number of fax calls at the same time for this model. See below the version number and an example of the voice user configuration:

IAD1#sh version
ADTRAN, Inc. OS version A4.11.00.E
  Mainline Version: M04
  Checksum: 829316F6
  Built on: Mon Jan 23 17:04:51 2012
  Upgrade key: 88f5f8504a6bec29461a51f93ffc8696
Hardware version DSP7119-2ndGen
Boot ROM version 14.04.00
  Checksum: 8549
  Built on: Wed Apr 11 15:24:20 2007
Copyright (c) 1999-2007, ADTRAN, Inc.
Platform: Total Access 912 (2nd Gen), part number 4212912L1
Serial number CFG0721735
Flash: 33554432 bytes  DRAM: 67108863 bytes

LoosCompany_IAD1 uptime is 9 weeks, 0 days, 18 hours, 10 minutes, 24 seconds

slot 0, DSP 1
  DSP software version: G2.A4.07.04
  DSP hardware version: Freescale MSC7119
  Total channels: 30

System returned to ROM by External Hard Reset
Current system image file is "T900G2A-A4-11-00-E.biz"
Primary boot system image file is "T900G2A-A4-11-00-E.biz"
Backup boot system image file is "9212916-20A104.biz"
Primary system configuration file is "startup-config"

voice user xxxxxxxxxx

  connect fxs 0/5

  password encrypted "1a1e5b71ee92b5ed6304ce4748ac1c824558"

  sip-authentication password encrypted "1b1f258bde4c9f3b85c50fc983ce3e214e68"

  modem-passthrough

[Anonymous]

The 2nd Gen only supports four T.38 fax calls.

[rivera]

Using command "sh media-gateway summary" I can tell the code per fax call. Can I have more than 4 fax calls using g711ulaw codec? I believe using this code for the fax is like a regular phone call is that correct?

If this is the case can I have 30 fax call using codec g711ulaw?

[Anonymous]

Yes with g711u you can have up to the maximum number of calls supported by the device.

If you are sending the traffic over the public internet there is a good chance you will have issues if you don’t use T.38.