Houston ISD Trunk System                                 3/25/07
                            by Myles Barkman KG5AI
                      http://home.houston.rr.com/freqzone
                            kg5ai*at*houston.rr.com

I've compiled this information from various sources as well as from my own personal observations.
If you have any additions or corrections to this list, please email me to keep this list accurate.

EDACS 9600 baud System (Wideband) WPTN982 has I-Call capability

Williams Tower site 01 (Post Oak Rd.):
866.1875c(1)    866.2625c(2)     866.6875c(3)   867.1875(4)
868.1625(5)    868.4375(6)     868.700(7)

Downtown Houston site 02 (600 Travis):
866.2875c(1)    866.6625c(2)     866.9125(3)    867.1625c(4)

Missouri City site 03 (McHard Rd.):
867.4125c(1)   867.6875c(2)     868.1875c(3)   868.4125(4)

  AFS /DEC  Use
02-021/273  HISD PD Ch.1 Dispatch (heard on downtown site)
02-022/274  HISD PD Ch.2 Secondary
02-023/275  HISD PD Ch.3 Campus Security link to 452.050 MHz (now using 02-067)
02-024/276  HISD PD Ch.4 Talk-around
02-025/277  HISD PD Ch.5 (not heard)
02-026/278  HISD PD TAC 1
02-027/279  HISD PD TAC 2

02-030/280  HISD PD link to Houston PD Citywide Ch.A5 (460.425 MHz)-not always activated
02-031/281  (not heard)
02-036/286  HISD PD TAC-3?
02-037/287  HISD Alarm Maint.?

02-041/289  Central Bus Motor Pool (NE)
02-042/290  Butler Bus Motor Pool (SW)
02-043/291  Delmar Bus Motor Pool (NW)
02-044/292  Barnett Bus Motor Pool (SE)
02-045/293  Student Safety
02-046/294  Bus Maintenance
02-047/295  Transportation Services-talkaround

02-061/305  Maintenance Area 1 (Central/Northeast)
02-062/306  Maintenance Area 2 (Nothwest/North Central)
02-063/307  Maintenance Area 3 (West/Southwest)
02-064/308  Maintenance Area 4 (South central/east)
02-065/309  Maintenance Area 5 (South/Southeast)
02-066/310  Maintenance Area 6 (North)
02-067/311  HISD Campus Security (6xx units) (heard on downtown site)

02-070/312  Operations Services-Grounds
02-071/313  Operations Services-Chemicals
02-072/314  Food Services-Repair/Maintenance
02-073/315  Truck Service Center
02-075/317 

02-101/337  Radio Shop
02-102/338  "623,600" "route"  communications or IT? (heard on downtown site)
02-104/340  ?
02-105/341  ?

02-126/358  "water not working in bathroom"

02-141/369  electrical? alarm installation?

03-003/387  PD Investigators?
03-006/390  crossing guards supervisors

12-081/1601 Public Safety Area Wide 1
12-082/1602 Public Safety Area Wide 2
12-083/1603 Public Safety Area Wide 3
12-084/1604 Public Safety Area Wide 4
12-085/1605 Montgomery County Hospital District EMS Med TAC 5 (during Hurricane Rita)-linked to Mont Co system
12-086/1606 Montgomery County Hospital District EMS Med TAC 6-linked to Mont Co system

12-091/1609 PHI "Texas Ops 1" linked to 159.900 MHz
12-092/1610 PHI

13-031/1689 PHI

Also check Eric Carlson's HISD List