# \#ua

**URL:** https://forums.digi.com/tag/ua/1432.md

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## [HDLC Link management ... (SABM & UA) ???](https://forums.digi.com/t/hdlc-link-management-sabm-ua/13175)

<div class="topic-metadata">

**Author:** [@hcyoo](https://forums.digi.com/u/hcyoo)\
**Replies:** 0\
**Last updated:** [June 20, 2014, 5:33am UTC](https://forums.digi.com/t/hdlc-link-management-sabm-ua/13175 "2014-06-20T05:33:46Z")

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i use RCM6700 for HDLC. (Serial F) between two rabbit module, hdlc working very well. but .between rabbit and another hdlc device, occur problem. the problem occur in the following flow. another hdlc device send S…