Vodavi Triad 1/2/3 Product Description Manual

11-1 4 Peripheral B oards
Ground Start (GCOB) Trunk Board
The GCOB board provides the interface to eight CO, FX, or WATS trunks.
†Each trunk circuit contains a hybrid, 2-wire interface circuit a nd
control circuitry.
†TheoperationforPulseDialingorDTMFsignalingcanbedoneona
per circuit basis.
†Each circuit has an LED indicator that gives trunk status.
†Each trunk circuit can be disab led as well as the card.
†A Normal/S erv ice switch loca ted toward the top of the card a llows...

Pe rip hera l Bo ards 11-15
Figure 1 1 -6: GCOB (CO/F X/WA TS T runk Board) 

11-1 6 Peripheral B oards
DI D Tru nk B o a rd ( D I DB )
The DIDB board p rov ides the interf ace to eight (8) loop D irect Inward
Di al ing (DI D) t r unks.
†Each of the trunk circuits conta in a hyb rid, 2-wire interface circuit,
and control circuitry.
†TheoperationforPulseDialingorDTMFsignalingcanbedoneona
per circuit basis.
†Each CO Li ne ci rcui t has an LED i ndica tor t hat gi ves t run k st at us.
†A Normal/S erv ice switch loca ted toward the top of the card a llows...

Pe rip hera l Bo ards 11-17
Figure 11-7: DIDB (Direct Inwa rd Dialing Boa rd) 

11-1 8 Peripheral B oards
T- 1 In t e r f a c e B o a r d ( T 1 I B )
The T 1I B boa rd al lows t he net wor k c onne c ti on t o a T- 1 1. 54 4 MB dig it al
int e rfa c e.
†Thi s b oar d su ppor t s s ta ndar d D4 f ram ing for mat wi th rob bed bi t
si gnal ing. Ex te nded Sup er fr ame (E SF) for mat i s a ls o sup por te d.
†The boa rd can s upport T IE , Loop and Groun d start s igna ling
emul at io n pe r c hanne l.
†The bo a rd re qu i re s a n ex te rna l CSU u ni t.
†The board ha s a 15-pin D...

Pe rip hera l Bo ards 11-19
Figure 11-8: T1IB (T-1 Trunk Board) 

11-2 0 Peripheral B oards
Primary Rate Interface Board (PRIB)
The PRIB allows the network connection to a Primary Rate ISDN digital
int e rfa c e.
†ThisboardsupportsExtendedSuperframe(ESF)formatandB8ZS
li ne c odin g.
†The boa rd can s upport T IE , Loop and Groun d Start s igna ling
emul at io n pe r c hanne l.
†The bo a rd re qu i re s a n ex te rna l CSU u ni t.
†The board ha s a 15-pin D -Sub connec tor for connection to a CS U unit.
†A Normal/S erv ice switch loca ted toward the top of the card a...

Pe rip hera l Bo ards 11-21
Figure 11-9: PRIB (PRI Trunk Board) 

11-2 2 Peripheral B oards
Basic Rate Interface Board (BRIB)
The BRIB allows the network connection to a Basic Rate ISDN digital
int e rfa c e.
†The boa rd can s upport T IE , Loop and Groun d Start s igna ling
emul at io n pe r c hanne l.
†TheboardusestheUinterfaceoftheBRIstandard.
†Conne ction to the ne twork is made via RJ 45 conne ctors on the fron t
edg e of the board. No NT1 d evice is required to connect to th e
cent ra l offi ce .
†A Normal/S erv ice switch loca ted toward the top of the card a...

Pe rip hera l Bo ards 11-23
Figure 11-10: BRIB ( BRI Trunk Board)