Why the same codec g711ulaw use different amount DSP resource in the Voice gateway?

[kevintang]

From this out put, you can see one g711ulaw call use 15 credits, but other 2 calls use 22 credits, why?

router1#sh voice dsp group all

DSP groups on slot 0:

dsp 1:

State: UP, firmware: 26.8.0

Max signal/voice channel: 32/32

Max credits: 480

num_of_sig_chnls_allocated: 32

Transcoding channels allocated: 0

Group: FLEX_GROUP_VOICE, complexity: FLEX

   Shared credits: 190, reserved credits: 0

   Signaling channels allocated: 32

   Voice channels allocated: 13

   Credits used (rounded-up): 290

   Voice channels:

     Ch01: voice port: 0/1/0:15.29, codec: g711ulaw, credits allocated: 15

    Ch02: voice port: 0/1/0:15.31, codec: g711ulaw, credits allocated: 22

     Ch03: voice port: 0/0/0:15.1, codec: g729br8, credits allocated: 22

     Ch04: voice port: 0/0/0:15.3, codec: g729br8, credits allocated: 22

     Ch05: voice port: 0/0/0:15.4, codec: g729br8, credits allocated: 22

     Ch06: voice port: 0/0/0:15.6, codec: g729br8, credits allocated: 22

     Ch07: voice port: 0/0/0:15.5, codec: g729br8, credits allocated: 22

     Ch08: voice port: 0/0/0:15.7, codec: g729br8, credits allocated: 22

     Ch09: voice port: 0/1/0:15.28, codec: g729br8, credits allocated: 22

     Ch10: voice port: 0/0/0:15.9, codec: g729br8, credits allocated: 22

     Ch11: voice port: 0/0/0:15.2, codec: g729br8, credits allocated: 22

     Ch13: voice port: 0/1/0:15.30, codec: g729r8, credits allocated: 22

     Ch14: voice port: 0/1/0:15.27, codec: g711ulaw, credits allocated: 22

Slot: 0

Device idx: 0

PVDM Slot: 0

Dsp Type: SP2600

[testeven]

Hi,

Are therew any fax relay calls involved? The reason to have more credits (22) assigned per channel is that the router keeps the highest resource consuming call and memorizes the value of the credits. If you reload the routeryou should get the credit values back to 15.

Regards,

Tere.

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