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- Description
- Specifications
The PA-4E1G/120 is a Cisco 4-port E1 G.703 serial port adapter for balanced 120-ohm twisted-pair cable. It gives up to four E1 synchronous serial interfaces specified by G.703/G.704, each full-duplex at 2.048 Mbps, on 15-pin D-shell (DB-15) receptacles. Its spare number is PA-4E1G/120=.
Each port gives framed and unframed service with HDB3 line coding and 4-bit CRC (CRC4). G.704 framing covers n x 64-kbps service with n from 1 to 31, and a data stream can be fractionalized into a single channel from 64 to 1984 kbps. Local and remote loopback testing are available. The default clock is recovered from the line; an internal clock generated on the adapter can be used instead.
The adapter removes the need for a separate external data termination unit when converting a serial interface such as V.35 to E1. It works in Cisco 7204VXR and 7206VXR routers (NPE-225, NPE-400 and NPE-G1), the 7301, the 7304, the 7500 with VIP, and the 7600 with FlexWAN or Enhanced FlexWAN. See the Cisco interface card category for more WAN adapters.
| Part number | PA-4E1G/120 |
| Spare number | PA-4E1G/120= |
| Type | 4-port E1 G.703/G.704 serial port adapter, 120-ohm balanced |
| Ports | 4 x E1, DB-15 receptacle |
| Line rate | 2.048 Mbps per port, full-duplex |
| Line coding | HDB3, CRC4 |
| Framing | G.704, n x 64 kbps (n = 1 to 31) |
| Fractional rate | 64 to 1984 kbps |
| Clock | line-recovered (default) or internal |
| Compatible with | Cisco 7204VXR, 7206VXR, 7301, 7304, 7500 (VIP) and 7600 (FlexWAN, Enhanced FlexWAN) |