# COMAR Title 12 — Department of Public Safety and Correctional Services

## Subtitle 11 — Office of the Secretary

### Chapter 03 — 9-1-1 Emergency Telephone System

#### Regulation .06 Minimum Enhanced 9-1-1 System Requirements.

*COMAR 12.11.03.06*

At a minimum, an enhanced 9-1-1 system implemented in Maryland shall include:

A. Sufficient incoming 9-1-1 lines for each telephone central office to ensure that not more than one in 100 call attempts during the average busy hour is blocked;

B. Connections to all public safety agencies covered by the system;

C. 24 hour, 7 day operation of the public safety answering point staffed with personnel trained as required under this chapter;

D. First priority to answering 9-1-1 calls;

E. Electronic recording of all 9-1-1 calls;

F. Playback capability of all 9-1-1 calls;

G. Connection to adjacent public safety answering points by private lines when there is a telephone exchange and jurisdictional boundary not covered by selective routing;

H. Security measures sufficient to minimize intentional disruption of the operation;

I. Standby emergency electrical power to keep the public safety answering point operating when commercial power fails;

J. At least one administrative line for nonemergency calls;

K. Written operational procedures;

L. Automatic location identification (ALI), which displays, at the public safety answering point, the address or location of the calling instrument;

M. Automatic number identification (ANI), which displays, at the public safety answering point, the calling telephone number;

N. Central office identification used to identify dedicated lines or trunks from a central office when a public safety answering point serves more than one central office;

O. A distinct tone, visible signal, or other process for:

  (1) Alerting the call taker that an incoming 9-1-1 call was disconnected; and

  (2) Receiving and displaying the telephone number with ANI and ALI information for a disconnected 9-1-1 call, when available;

P. Providing access to services for an individual:

  (1) With a speech or hearing disability; or

  (2) Who does not speak or understand the English language; and

Q. Other technical advances approved by the Board.