SBS signaling calls can tandem through intervening nodes but those nodes must be Communication Manager systems, equipped with release 1.3 or later. Unlike SBS bearer calls, tandem SBS signaling calls must be carried on SBS trunks for all segments of the call. For more information, see Typical SBS call connection examples.

You must administer appropriate steering of extension numbers at intervening nodes to insure proper routing of tandem bearer calls.