HDLC Overrun with Chan SS7

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I’m running an 8E1 setup to an SS7 carrier. The setup works but when we
start hitting the 80 active calls mark the link became unstable.

I found a lot of the following messages afecting my d channel

Jun 25 15:49:55 ostional kernel: [385661.368857] dahdi: HDLC Receiver
overrun on channel TE4/0/1/31 (master=TE4/0/1/31)

Im using TE410P