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6-2
PORT TYPES/INSTALLATION COMPATIBILITIES
Generic 1, Generic 2, CEM, or D4-channel bank). The other line-interface unit connects to the
NCTE and T1 facility.
Dedicated data applications, both point-to-point and multipoint, can be connected to the CDM and
inserted in selected channels. At the receive end, particular channels may be dropped from a DS1 or
T1 facility by another CDM, or routed through a dedicated switch connection (DSC) as required.
TABLE 6-1. Supported Digital Facilities
DS1/DMI/ISDN-PRI Circuit-Pack Suffix Compatibility Matrix
Signaling
System 85 R2 and G2 System 75 R1 and G1
Type
Switch
TN380_
ANN11_
ANN35_
TN555 TN767 Switch TN722_ TN767
Version
(Note 1) (G2 Only)
(G2 Only)
Version
E&M V1-V4,G2 B, C, D B, C, D, E
N/A
N/A
all
V2,V3,G1
all all
Signaling
(Note 2) (Notes 2&3)
Ground Start
V3,V4,G2 C, D C, D, E N/A
N/A
all G1
N/A
all
(CO, FX, WATS, RA,
(Note 4)
Plus DID)
Loop Start
V3,V4,G2 C, D C, D, E
N/A N/A
all G1
N/A
all
(CO, FX, WATS, RA)
(Note 4)
OPS Line (Note 5)
V3,V4,G2 C, D
C, D, E
N/A N/A
all G1
N/A
all
DMI-BOS (Note 3) V3,V4,G2 C, D D, E
N/A N/A
all
V2,V3,G1
B
all
DSC (analog data)
V3,V4,G2 C, D
C, D, E
all
N/A
all
N/A N/A N/A
(Note 6)
DMI-MOS and ISDN V4,G2 D N/A
all
N/A
all G1
N/A
all
(Note 7)
(Note 8)
Proprietary V1-V4,G2 B,C,D C,D,E
N/A N/A
all
V2,V3,G1
all all
(Note 2)
NOTES:
1.
The ANN11E and ANN11C have similar functions with one exception: the ANN11E supports the DMI-BOS 24th-channel-signaling
format and the ANN11C does not. The DMI-BOS format was added in addition to the proprietary 24th-channel and robbed-bit
formats supported by ANN11C. The applications of these formats are summarized below in a feature comparison. The ANN11C
and ANN11E are compatible with respect to all other options not listed in this table (including robbed-bit (RB) signaling, D4/ESF
framing, and ZCS/B8ZS line coding).
SIG. TYPE ANN11 REQ
APPLICATIONS SUPPORTED
Robbed Bit C or E
Voice-grade tie, DID, & CO trunks, OPS lines, connections to D4-channel banks, DSCs, ACCUNET
®
switched digital
Proprietary C or E
AVD-tie trunks between System 85s and between System 85 and System 75
24th Chan.
DMI-BOS E
Proprietary 24th-channel format applications plus connections to any endpoint conforming to the
24th Chan. “AT&T Digital Multiplexed Interface Technical Specification”. Examples include 3B5 hosts, HP3000
hosts, and IBM
®
IDNX multiplexers. These endpoints are called “DMI-BOS endpoints” in these
notes. Other vendor equipment is certified by AT&T for this connectivity. Certified equipment
requires an ANN11E at the System 85 end.