Module labelSRP IOA
IOA label
  • Not applicable
Number of IOA ports
  • 3
Software release
  • First supported: 7.0.1
  • 15 W maximum
  • Pairs with SRP module
  • Interfaces with the SRP modules through the system's midplane.
  • Ethernet (IEEE 802.3)
  • 10/100Base-T
  • RS-232
  • Auxiliary port allows access to debug ports on a specific processor (SRP module, LM).
  • External clock input accepts T1 or E1 signaling. You must configure the interface for T1 or E1. No additional configuration for a specific framing mode is required (for example, SF/ESF).
  • The BNC connector has a 75–Ohm load impedance.
  • T1 inputs must be converted from a balanced 100–Ohm signal to an unbalanced 75–Ohm signal by using a balun.
  • The minimum signal amplitude at the BNC connector is 400mV peak.
Software features
  • Not applicable
Model compatibility
  • E320 router
  • E120 router
Line module compatibility
  • Not applicable
SRP module compatibility
  • SRP-100
  • SRP-120
  • SRP-320
Port redundancy support
  • Not applicable
Cables and connectors
  • Terminal blocks
  • Two dual-purpose BNC connectors (primary and secondary) for BITS timing clock sources (E1 or T1); 75–ohm E1 2.048–Mbps/T1 1.544–Mbps inputs terminating with a 120/75 ohm or 100/75 ohm balun
  • One 10/100Base-T Ethernet management port with an RJ-45 connector
  • Two RS-232 ports with DB-9 connectors for direct command line interface (CLI) and debug access
  • See E120 and E320 Hardware Guide, Chapter 5, Cabling the Router for more information.
  • None
Alarms, errors, and events
  • See Monitoring Modules in JunosE System Basics Configuration Guide, Chapter 6, Managing Modules.