27 — Loopbacks
27.1 Using loopbacks
27.2 2B1Q circuit loopbacks
27.3 DNIC circuit loopbacks
27.4 Data circuit loopbacks
27.5 Primary rate circuit loopbacks
27.6 Primary rate link loopbacks
2902 MainStreet Technical Practices
May 2002
90-2906-01
27-2
27-3
27-6
27-11
27-13
27-15
27-1