Carrier Access Access Navigator - Manual (Page 59)

Access Navigator - Release 1.8 August 2003 3-11
Access Navigator / GR-303 + Data Host
Specifications
Specifications
GR-303 Operation
l Up to 32 T1s per system
l Primary and redundant protection for EOC and TMC
l GR-303 to TR-08 translation for CA’s Access Bank I/TR-08
l GR-303 Direct Inward Dial (DID) support for Lucent 5ESS switches
l GR-303 line concentration of 4:1 TDM ISDN BRI services
l Alarm and maintenance support for DS1 terminations
l Compatible with Lucent, Nortel, and Siemens switches
l Configurable concentration ratios
l Programmable call reference values (CRVs)
l Redundancy, 1:1 controller & power conversion
Crossconnects
l DCS 1/0 interface supports crossconnects at DS0 level
l
Crossconnects up to 24 contiguous DS0s between T1s with one command
DS1 Interface
l Four T1s per line card, hot swappable
l Line rate: 1.544 Mb/s ± 32ppm
l Line code: B8ZS or AMI
l Framing: D4 (SF) or ESF
l DS1 receive sensitivity: –28dB to +1.5dB
l Line build-outs:
DSX-1 (0 to 660 ft. in 5 steps)
CSU (0 dB, –7.5 dB, –15 dB, –22.5dB)
l ANSI T1.403, Section 6 & 7 (jitter, pulse mask transmission, receive sensitivity, framing
formats)
l Built-in CSU with loopback and BERT for testing the T1s
System Clocking
l Primary and secondary sources from: DS1s, external clock source (such as BITS) or internal
clock (minimum Stratum 4)
l Automatic clock switching and holdover