The expected throughput data rate on an SS7 link configured to run at 64 kbps should be approximately 53 kpbs, allowing for link overhead such as flags, bit stuffing, and sequence numbering. However, when using a 64 kpbs link on the IT Telekommunikations AG (ITK, now Digi International AG) cards, the uplink data rate is approximately 40 kbps and the downlink data rate is approximately 52 kbps
